Your Bokeh Shimano
THE LATEST EVOLUTION OF OUR UNIQUE MASON BOKEH, WITH CONFIGURABLE SHIMANO BUILD OPTIONS
Introducing the latest evolution of our iconic Bokeh gravel bike. Building on the success of its predecessor, we've made intelligent and informed changes to enhance the riding experience while staying true to our philosophy of #RideDrivenDesign.
The Bokeh is our multi-award winning, Italian crafted, custom tubed, premium Dedacciai aluminium framed 'AdventureSport' machines for fast ‘Continent Crushing’ rides and they can use either 650b x 55mm or 700c, with up to 45mm tyres. Many customers specify 2 sets of wheels, and a quick swap dials the Bokeh perfectly to your chosen terrain or adventure.
GRX is Shimano's adventure-riding specific groupset. Designed with a range of unique performance features and ergonomics developed over several years to make adventure riding as fast and comfortable as possible.
There's so much thinking and neat detailing in our products that it's really impossible to tell you all about it here. There's further information, including sizing advice, in the 'TECHNICAL INFO' section below, or If you would like to find out more, or book a test-ride, please CONTACT US HERE.
You can read the Bokeh3 Bike Perfect 5 STAR Review HERE.
Features
- Select From: Shimano GRX mechanical 11 speed / GRX Di2 11 speed / GRX mechanical 12 speed / 1x or 2x
- Revised and refined hose and cable routing, using our MASON MultiPort adaptable internal routing
- Dedicated internal dynamo routing through top tube and fork. Light-mount on fork crown.
- Fully and discretely eyeletted, with clearance for full mudguards and large volume tyres. Dedicated rack-mounts.
- Full set of high-grade, stainless steel accessory mounting screws and small parts, including cable routing parts and MASON Multiport inserts, supplied with frameset.
- Available with a choice of HUNT, DT Swiss and Campagnolo wheelsets in 700c or 650b. Other options available on request.
- Carbon MASON Penta microadjust seatpost and MASON Macro seatclamp.
- Increased clearance for 650b x 55 [2.1”] or 700c x 45 wheel/tyre sizes.
- Mason 'ThruBB' 56Ømm, internally routed bottom bracket shell.
- This bike can be fitted with the Mason Luminance Upgrade. The ultimate dynamo + lighting set-up for all-terrain and multi-surface adventures. See 'Accessories + Upgrades' for details.
- A choice of finishing kit from Deda and Ritchey
- Available with a choice of the best 650B and 700C tyres from Panaracer, WTB, Rene Herse and Schwalbe.
- Dedacciai, custom formed, triple-butted performance Aluminium frame with Mason RangeFinder AS full carbon Thru-Axle fork.
- Cutting edge anodised aluminium pre-paint treatment.
Details
A DECADE OF DETAILS
With 10 years of perfecting & optimising every detail in our MASON range, along with over 25 years of metal frame design experience, we feel confident that all the features you'll ever need, along with some that you hadn't thought of, are lovingly and meticulously included in your frameset and finished bicycle.
We actively support some of the most experienced adventure and endurance riders, listen to our customers and work closely with experienced and passionate frame makers. Because of this rich mix, we are able to offer what we believe to be the most carefully designed, obsessively detailed and lovingly made framesets and bicycles in the world.
MASON MAKERS
BUILT WITH CARE AND ABSOLUTE ATTENTION TO DETAIL
We’re proud to collaborate with independent, bespoke frame makers who are at the pinnacle of their craft. This is something we care about a lot and we feel honoured to be working with small makers in Italy for most of our models, some who have been dedicated to the art of metal frame production for nearly 75 years.
Technical info
Select size
(mm unless specified) |
Dimensions ||
---|---|---|
A > | SEAT TUBE C/T | 480 |
B > | SEAT TUBE C/C | 432.2 |
C > | BB DROP | 77 |
D > | REAR CENTRE | 435 |
E > | TT EFFECTIVE | 515.9 |
F > | TT ACTUAL | 497.8 |
G > | STACK | 536.1 |
H > | REACH | 359.9 |
I > | STAND-OVER | 741 |
J > | OFFSET | 50 |
K > | TRAIL Trail data for more wheel/tyres in full geo. chart (where applicable) |
74.7 |
L > | FORK CROWN HEIGHT | 398 |
M > | HEAD ANGLE | 69.5 |
N > | HEAD TUBE LENGTH | 100 |
O > | SEAT TUBE ANGLE | 74 |
P > | WHEELBASE | 1013 |
Q > | HANDLEBAR (OUTSIDE DIMENSION) | 40 |
(mm unless specified) |
Dimensions ||
---|---|---|
A > | SEAT TUBE C/T | 500 |
B > | SEAT TUBE C/C | 453 |
C > | BB DROP | 75 |
D > | REAR CENTRE | 435 |
E > | TT EFFECTIVE | 519.9 |
F > | TT ACTUAL | 503.9 |
G > | STACK | 537.9 |
H > | REACH | 363.5 |
I > | STAND-OVER | 764.1 |
J > | OFFSET | 50 |
K > | TRAIL Trail data for more wheel/tyres in full geo. chart (where applicable) |
75.3 |
L > | FORK CROWN HEIGHT | 398 |
M > | HEAD ANGLE | 70 |
N > | HEAD TUBE LENGTH | 115 |
O > | SEAT TUBE ANGLE | 74 |
P > | WHEELBASE | 1013.7 |
Q > | HANDLEBAR (OUTSIDE DIMENSION) | 42 |
(mm unless specified) |
Dimensions ||
---|---|---|
A > | SEAT TUBE C/T | 520 |
B > | SEAT TUBE C/C | 473.0 |
C > | BB DROP | 75 |
D > | REAR CENTRE | 435 |
E > | TT EFFECTIVE | 535.9 |
F > | TT ACTUAL | 520.3 |
G > | STACK | 554 |
H > | REACH | 374.0 |
I > | STAND-OVER | 781.8 |
J > | OFFSET | 50 |
K > | TRAIL Trail data for more wheel/tyres in full geo. chart (where applicable) |
72.0 |
L > | FORK CROWN HEIGHT | 398 |
M > | HEAD ANGLE | 70.5 |
N > | HEAD TUBE LENGTH | 130 |
O > | SEAT TUBE ANGLE | 74 |
P > | WHEELBASE | 1021.8 |
Q > | HANDLEBAR (OUTSIDE DIMENSION) | 42 |
(mm unless specified) |
Dimensions ||
---|---|---|
A > | SEAT TUBE C/T | 540 |
B > | SEAT TUBE C/C | 493.5 |
C > | BB DROP | 73 |
D > | REAR CENTRE | 435 |
E > | TT EFFECTIVE | 551 |
F > | TT ACTUAL | 534.4 |
G > | STACK | 568.1 |
H > | REACH | 376.2 |
I > | STAND-OVER | 799.4 |
J > | OFFSET | 50 |
K > | TRAIL Trail data for more wheel/tyres in full geo. chart (where applicable) |
68.7 |
L > | FORK CROWN HEIGHT | 398 |
M > | HEAD ANGLE | 71.0 |
N > | HEAD TUBE LENGTH | 145 |
O > | SEAT TUBE ANGLE | 73 |
P > | WHEELBASE | 1028.4 |
Q > | HANDLEBAR (OUTSIDE DIMENSION) | 44 |
(mm unless specified) |
Dimensions ||
---|---|---|
A > | SEAT TUBE C/T | 560 |
B > | SEAT TUBE C/C | 513.7 |
C > | BB DROP | 73 |
D > | REAR CENTRE | 435 |
E > | TT EFFECTIVE | 561.4 |
F > | TT ACTUAL | 546.3 |
G > | STACK | 579.5 |
H > | REACH | 383.4 |
I > | STAND-OVER | 814.8 |
J > | OFFSET | 50 |
K > | TRAIL Trail data for more wheel/tyres in full geo. chart (where applicable) |
65.4 |
L > | FORK CROWN HEIGHT | 398 |
M > | HEAD ANGLE | 71.5 |
N > | HEAD TUBE LENGTH | 155 |
O > | SEAT TUBE ANGLE | 73 |
P > | WHEELBASE | 1034.4 |
Q > | HANDLEBAR (OUTSIDE DIMENSION) | 44 |
(mm unless specified) |
Dimensions ||
---|---|---|
A > | SEAT TUBE C/T | 580 |
B > | SEAT TUBE C/C | 534.1 |
C > | BB DROP | 70 |
D > | REAR CENTRE | 435 |
E > | TT EFFECTIVE | 580.8 |
F > | TT ACTUAL | 567.2 |
G > | STACK | 587.9 |
H > | REACH | 395.2 |
I > | STAND-OVER | 831.0 |
J > | OFFSET | 50 |
K > | TRAIL Trail data for more wheel/tyres in full geo. chart (where applicable) |
62.1 |
L > | FORK CROWN HEIGHT | 398 |
M > | HEAD ANGLE | 72 |
N > | HEAD TUBE LENGTH | 165 |
O > | SEAT TUBE ANGLE | 72.5 |
P > | WHEELBASE | 1045.4 |
Q > | HANDLEBAR (OUTSIDE DIMENSION) | 46 |
(mm unless specified) |
Dimensions ||
---|---|---|
A > | SEAT TUBE C/T | 60 |
B > | SEAT TUBE C/C | 554.2 |
C > | BB DROP | 70 |
D > | REAR CENTRE | 435 |
E > | TT EFFECTIVE | 590.7 |
F > | TT ACTUAL | 577.1 |
G > | STACK | 607.0 |
H > | REACH | 399.1 |
I > | STAND-OVER | 850.0 |
J > | OFFSET | 50 |
K > | TRAIL Trail data for more wheel/tyres in full geo. chart (where applicable) |
62.1 |
L > | FORK CROWN HEIGHT | 398 |
M > | HEAD ANGLE | 72 |
N > | HEAD TUBE LENGTH | 185 |
O > | SEAT TUBE ANGLE | 72.5 |
P > | WHEELBASE | 1055.4 |
Q > | HANDLEBAR (OUTSIDE DIMENSION) | 46 |
(mm unless specified) |
Dimensions ||
---|---|---|
A > | SEAT TUBE C/T | 620 |
B > | SEAT TUBE C/C | 574.7 |
C > | BB DROP | 70.0 |
D > | REAR CENTRE | 435 |
E > | TT EFFECTIVE | 600.5 |
F > | TT ACTUAL | 585.8 |
G > | STACK | 630.7 |
H > | REACH | 401.4 |
I > | STAND-OVER | 871.7 |
J > | OFFSET | 50 |
K > | TRAIL Trail data for more wheel/tyres in full geo. chart (where applicable) |
62.1 |
L > | FORK CROWN HEIGHT | 398 |
M > | HEAD ANGLE | 72 |
N > | HEAD TUBE LENGTH | 210 |
O > | SEAT TUBE ANGLE | 72.5 |
P > | WHEELBASE | 1065.5 |
Q > | HANDLEBAR (OUTSIDE DIMENSION) | 46 |
This page gives you some guidelines based on rider height, but these are only a starting point for a proper bike fitting. There are of course many other factors to consider when choosing the right size for you and sizing advice will vary depending on your choice of model from the Mason range and the way that you intend to ride it. We're always here to help of course and would always recommend a professional bike fitting and visiting us for a ride on the Mason Cycles riverside gravel/country lanes test-loop if you can. There is further advice, based on specific models, below the height chart.
Fitting a bike to a rider is an important process, this information is a start to the process but it’s not really possible to give 100% accurate fitting instructions online.
Humans are odd shapes, each person’s physical dimensions: arm, torso, femur length, level of flexibility, skill level and intended model usage are very different. This means that there will invariably be different frame size requirements, even for people of the same height and inseam.
SIZING ADVICE BASED ON MASON MODELS
ROAD, ALL-ROAD & GRAVEL - Aspect | Resolution | Definition | SLR | BokehTi | Bokeh | Exposure: Size range is 48cm to 62cm depending on specific model. The chart dimensions show the extremes of useable frame size based on height and the rider size range is very similar for all our frames with 6 or 8 standard sizes.
ULTIMATE ADVENTURE - InSearchOf: Size range is 42cm to 58cm [5 sizes]. As a start point, we would recommend selecting one size down from your normal 'road' frame size. For example, if you would normally ride a 54cm then a 50cm InSearchOf is probably best for you.
MTB, TRAIL/TRAVEL - RAW: Size range is Sml to XL [4 sizes]. With the advent of modern, more progressive mountain bike geometry, the sizing process is even more fluid. The Mason RAW is no different: seat tube lengths are kept deliberately low so riders have a certain amount of flexibility in choosing size based on their preferred reach, wheelbase, handling characteristics and intended use. For instance, for high speed and loaded up stability you may prefer a larger frame that will also provide more pack space in the front triangle. Or, if you are spending most of your time on twisty woodland singletrack, you’d benefit from the shorter wheelbase and extra response of the smaller frame.
We are experienced in sizing and geometry, so of course we will be on the end of the phone or email to help and advise, but we would always recommend having a proper bike fit done before committing, especially if you feel like you may be between sizes. If you do fall between our frame sizes, it’s probably best to go with the smaller size. It’s easier to make a smaller frame fit a little larger than vice versa.
CONFIGURATION: With all models, you can use our drop down menus to configure your finishing kit to suit your needs, including which brake lever operates front/rear wheel and for MTB we’re happy to cut down the handlebar to your desired width.
Please email us here or call 01273 463000 if you have further requirements that you would like to discuss, we are always happy to help.
InBoard Disc-Mount
The calliper is mounted on the chain stay, this allows us to use lighter more comfortable seat-stays and gives a flex free mounting for the post-mount components to be welded to. Mounting the brake on the chain stay also keeps it cleanly out of the way of rack and ‘guard stays.
Multiport
Our frames use an adaptable, internal cable routing system. Developed by us to allow your Mason frame to be used with a combination of control systems and adapt and evolve with your requirements and riding styles. We were the first to bring this type of system to a performance steel frame and now use this system across our range. Interchangeable alloy parts allow five options:
1. Full cable outer. 2. Hydraulic Hose. 3. Split outer. 4. Electronic cable [e.g. Shimano Di2]. 5. 2 x Hose/cable or Hose/Dynamo wire 6. Blank.
Taper Head Tubes
Our frames use modern 1-1/8” - 1.5” taper head tubes. Pioneered by composite frames, the taper head tube makes huge sense for metal frames too;
The large overall diameter provides a useful weld area. The fully integrated headset is light and has a very low stack-height. Large 1.5” lower bearing, mated to a tapered carbon fork steerer, spreads the load and gives flex-free braking and instant response to steering input.
Threaded Bottom Brackets
We choose a more traditional 68mm, BSA, threaded standard for our AdventureSport frames because we believe it gives greater durability and creak-free reliability over many miles. The threaded BB is easier to service using standard tools and you are more likely to find a replacement when adventuring far from home. A properly lubricated, threaded BB is also an ideal interface with a metal BB shell.
Thru-BB
'Thru-BB' is unique to MASON aluminium frames. The large 56mmØ presents a large weld area to the base of the down tube and then steps down to the 68mm width threaded seats. This step-down provides plenty of space around the outside of the bottom-bracket bearings to allow the control cable and hose to pass through on the way to the chain stays and out to the brake and rear mech.
IMPORTANT: This BB shell design requires the use of a bottom bracket with a 24mm or 30mm 'sleeved' axle like most Shimano or SRAM DUB, because the hose/cables run through the shell and under the axle. DO NOT use a bottom bracket type without a sleeve. Campagnolo sleeves are available on the site HERE. Please contact us if you would like advice on compataible cranksets/BB types.
Hourglass Stays
We tried many shapes before settling on this one, the wall thickness tapers from top to base and the perfect ‘hourglass’ profile gives a sublime, smooth ride with the added spring of steel keeping things lively. We add a custom bend at the base to work with the disc-rotor and calliper.
BoatTail Stays
Unique to MASON. The seat stays flow out of the ovalised top tube and then curve and taper down to meet the chain stays which curve up towards the axle. We call this ‘BoatTail’, a custom bend giving disc-rotor and calliper clearance, helping to avoid chain-slap on the rough stuff and allowing a little compliance to help smooth the ride.
Aluminium Dedacciai Tubing
The entire tubeset was developed in conjunction with Italian, metal tubing gurus Dedacciai. The Definition is constructed from Triple Butted, Hand Selected, custom shaped, 7000 series, Dedacciai Alu tubes and tig welded by hand with beautiful Smooth weld beads. The welds require no after sanding or finishing, so there is no thinning and weakening of the tubes at crucial areas. The frame is fully heat treated, stress relieved and anti-corrosion treated after welding.
Disc Brakes
This frame is designed for disc brakes. They work consistently in all conditions, pull up quicker in the wet, they don't grind your expensive rims into black sludge and in my experience they change the whole riding experience for the better, especially when coupled with modern disc-specific wheels and high-volume tyres. You’ll find yourself riding in a more confident, controlled, fluid and ultimately more efficient way.
Internal Routing
We route the hoses and cables internally where practical, keeping the 'adventure nature' of our bicycles firmly in mind. For smoother runs and a cleaner aesthetic, all control cables, hoses and electronic shift control wires now run through the down tube, via the special BB shell and out through the chainstays, guided by our Mason 'MultiPort' adaptable inserts. Interchangeable Internal routing keeps the control cabling away from road dirt and grime, helps avoid accidental damage, makes cleaning easy, de-clutters your bike and means you can adapt your bike easily to work with various shifting and braking methods. For adventure and endurance riding, internal routing also has the advantage that it is easy to strap frame packs to the frame tubes without being hindered by external cabling and hoses.
Integrated Headset
Integrated, 41.8ø upper, 51.8ø lower, for taper head tube. Both bearings are ‘ACB’, meaning ‘Angular Contact Bearings’. The head-tube seat angle is 45º.
The headset drops into a tapered seat in the head tube and is tensioned using a headset tensioner within the fork steerer. Tensioning the headset centres it on the taper and prevents any play. The larger lower bearing allows a tapered steerer and larger crown. This gives sharper response, helps reduce flex under braking and spreads bearing load.
1x Drivetrain
'1x' is a multi-terrain performance drivetrain with maximum chain security thanks to the narrow-wide chainring and jockey wheels and 'clutched' rear-mech. The range of gears is equivalent to a 2x compact drivetrain, but with the elimination of doubled-up crossover gears. '1x' are lighter, quieter, and more secure.
ISO Testing
All our frames complete the intensive strength and fatigue testing to fully comply with ISO standards. The AdventureSport range of frames are put through the tough road race ISO testing, with its brutal Horizontal Fatigue test. The Parallax fork goes through the MTB test with its even tougher 'Drop Testing' standards. Because of this we are confident that these frames will last you a lifetime of hard riding.
It's not law that frames and forks have to be tested to their limits like this, but our frames will always be tested in this way, so you can be sure that your MASON frame not only looks beautiful with a ride quality to match, but it is tough, safe and dependable too.
650B/700C
The Bokeh and Exposure are optimised for large-volume treaded tyres, and are designed for 650B and 700C wheel sizes. Using the smaller 650B wheel means that you can fit a larger-volume treaded tyre for off-road applications, or use a 700C wheel with a tyre of less volume, but with the same rolling radius, when prioritising rolling speed.
We've worked together with HUNT Bike Wheels to develop the tubeless-ready, extra-wide, 650B 'AdventureSport' wheelset: replaceable cartridge bearings; traditional J-bend spokes; easy strip down of the hub system requiring traditional tools only.
Bottle #3
A third bottle cage mount at the base of the down-tube to allow for an additional bottle or tool keg to be fitted. The third bosses are positioned close to the BB to maximise tyre clearance and keep the centre of gravity low.
FlatMount Brake Calipers
Flat mount disc-brake callipers are lighter, neater, and open up more space within the dropout area for racks and ‘guards. The calliper is mounted to the dropout, allowing us to use a lighter, more comfortable seat-stay. Up front, the calliper is mounted directly to the fork [via the brake manufacturers adaptor] and offers a cleaner and more minimalist appearance and also provides a compact packaging of the brake caliper.
D-Form Downtube
The DForm down tube is designed by us and tooled exclusively for MASON by Dedacciai in Italy. It is not a simple ‘D’ section and varies in shape from being taller/narrower at the head tube to being wider and lower in section where it meets the BB shell. This shape allows a very wide weld where the tube meets the BB, giving it great stability and ensuring that the weld doesn’t excessively overlap onto the base of the seat tube.
Custom Tubeset
We choose each tube individually, considering the influence that it will have on ride quality and overall performance. We will use a blend of tubing types, custom shapes and bends to help us achieve this goal.
Modern metal frames draw on many of the design influences learnt from composite frames, such as oversized BB’s, taper head tubes and switchable internal routing. Teamed with our properly designed carbon-monocoque forks, the contemporary Aluminium, steel or Titanium frame is a formidable piece of kit.
Switchlever
This model uses SwitchLever Thru-Axles front and rear. This high quality axle system features a removable lever to be used with both axles. Store the lever in the front axle for quick use or remove completely for extra security and a clean, low-profile look.
Optimised Seat tube size
Our smaller frames sizes, from 48 to 58cm use a 31.8mm seat tube and 27.2mm seatpost. Smaller lighter riders don't require large, stiff seatposts and the smaller diameter post and tube help dial out some road-buzz and add long distance comfort.
The larger frame sizes - 60 and 62cm, use oversize 34.9mm seat tubes and 31.6mm seatposts. The larger diameter seat tube adds 'core-stability' to the larger frames and enhances power transfer for larger more powerful riders, with the larger 31.6mm post adding more support.
6 x Accessory Mounts: Bokeh3
The Bokeh is designed for long-distance bikepacking and gravel racing, so the frame and fork are fitted with plenty of bottle and accessory mounts. There are 2 x bottle/accessory mounts on the RangeFinder•AS fork, as well as traditional pannier rack mounts.
Standard frame mount bosses: x2 down tube (top side); x2 down tube (underneath); x2 seat tube; x2 top tube for securing a top tube pack. All eyelet positions are optimised, meaning fluid carrying and bag space are maximised within the frame. The 4th accessory/tool-keg/fluid mount, is now mounted as low as possible under the down-tube, giving space for a larger bottle or bag, whilst still maintaining clearance for larger wheerls/tyres.
RangeFinder•AS
We have developed and tooled for the entirely new ‘RangeFinder•AS’ fork which is custom-tuned for the Exposure and Bokeh3 models. Featuring pannier & ‘rando’ style rack mounts, triple ‘anything-cage’ style accessory mounts, Ø12mm Thru-axle, 160/180mm flat-mount, and huge 27.5 x 2.35” | 700C x 50mm (with a 62mm fender) tyre clearance. The carbon lay-up of this fork has been optimised for this frame’s usage. Additionally featuring sealed internal brake and dynamo light cable routing and our unique Mason 'F-Stop' axle system, with Mason developed SwitchLever axle and replaceable fork inserts.
160/180 Flat-Mount
Our HotShoe [InSearchOf] and RangeFinder [SLR, Exposure, Bokeh3] forks, are amongst the first carbon forks to have Flat-Mount capability for 160 and 180mm rotors. This allows for controllable, dependable stopping power when riding loaded and in steep, rough conditions.
Essental Dimensions: Bokeh 3
BRAKING
Rotor Size: The RangeFinder fork is designed for 160 or 180mm rotor [using flat-mount adaptor]. 160mm is the maximum recommended diameter for the rear, 140mm minimum.
Calliper Type: These frames are designed for flat-mount calipers. It's possible to fit post-mount calipers front and rear with the use of a flat > post-mount adapter.
Bokeh Flat-Mount Mounting Bolt Lengths: FRONT - 15mm. REAR - SRAM: 22mm. Shimano: 28mm.
[Bolt lengths for mounting Flat-Mount brake calipers to our frames vary across the range, because of the different dropout designs and materials used].
We always recommend using genuine hardware and consulting us directly using the 'Technical' dropdown, or using a qualified cycle mechanic if in doubt.
NOTE: This frame is compatible with most modern disc-brake systems but may not be suitable for ALL brake callipers. Please check clearance before purchasing your braking system. Please consult us re cable routing when using cable-actuated braking system.
CHAINRING SIZES
Max 1x chainring size: 42T.
Max 2x chainring size: 31/48T.
Frameset Only Customers: Contact us if you would like further advice on fitting your specific chainset.
WHEELS + AXLE SPACING
Ø12mm Thru-axle Front / Ø12mm Thru-axle rear.
Front axle spacing: 100mm. Rear axle spacing: 142mm.
Axle length/pitch: Bokeh: Front - 120mm/1.5P. Rear - 160mm/1.5P.
TYRES
The below are guides only. Fitted width may vary depending on manufacturer and rim width. Please check true dimensions of chosen components to be sure.
Bokeh:
Max tyre widths with fender:
700C x 41mm | 650b x 50mm.
Max tyre widths without fender:
700C x 45mm | 650b x 52mm [27.5 x 2.1"].
SEAT POST Ø
Frame size 48 to 58cm: 27.2mm. Frame size 60 & 62cm: 31.6mm.
SEAT CLAMP Ø
Frame size 48 to 58cm: 31.8mm. Frame size 60 & 62cm: 34.9mm.
FRONT MECH Ø
Frame size 48 to 58cm: 31.8mm. Frame size 60 & 62cm: 34.9mm.
BB TYPE
68mm shell width. BSA threaded.
RANGEFINDER FORK
Headset type: Integrated, 41.8Ø upper, 51.8Ø lower, for taper head tube. Angular Contact Bearings. The head-tube internal seat angle is 45º. The lower crown race angle is 45º. Note: New 'CarbonRace' technology used with RangeFinder forks means that the use of the lower crown race supplied with headsets is not necessary. Lower bearing seats directly on carbon taper seat.
Stack-washer maximum: 40mm below stem is max. recommended for carbon steerer. Warranty is void above this dimension.
Dimensions: Crown height - 398mm. Offset - 50mm.
Mounting Bolt Torque: 4Nm.
Accessory Cages: Max load capacity 6kg per side. Follow manufacturers installation and loading instructions.
Pannier Racks: Max total load capacity of 10kg. Follow manufacturers installation and loading instructions.
Rando Racks: Max load capacity of 2.5kg. Follow manufacturers installation and loading instructions.
Total Combined Load Capacity: 15kg.
Specifications
Our frame sets deserve the best components, so we put a great deal of thought into the mix of parts used for each bike build. Bars, stem and crankset are sized to match frame size choice. See Geometry chart for component sizing.
Frame | MASON x Dedacciai custom-shaped performance Aluminium. |
Fork | MASON RangeFinder AS carbon fork which is custom-tuned for the Bokeh. Features pannier & ‘rando’ style rack mounts, triple accessory mounts, Ø12mm Thru-axle, 160/180mm flat-mount. |
Headset | Select From: Deda & Chris King. |
Colours | Flare Orange / SensorBlue / Optic Green / Sepia. |
Bike Weight | 54cm, with GRX 810 2X - 9.2kg. |
Sizes | 8 Sizes: 48 / 50 / 52 / 54 / 56 / 58 / 60 / 62. |
Chainset 2X | 48/31. Select From: 810 GRX 11spd & 820 GRX 12spd. |
Chainset 1X | 42T. Select From: 810 GRX 11spd & 820 GRX 12spd. |
Shifting | GRX-810 11spd Mechanical / GRX-820 12spd Mechanical / GRX-815 Di2 11spd - As Selected. |
Cassette 2X | 11-34 GRX 810 / 11 - 36 OR 11-34 GRX 820 - Alternative ratios available on request. |
Cassette 1X | GRX 810 11-42 / GRX 820 10-45T. Alternative ratios available on request. |
Chain | Shimano GRX Chain. Other options available on request. |
Wheels | Select From: HUNT / DT Swiss / Campagnolo. Other options available on request. |
Tyres | 700C & 650B. Select From: Rene Herse / Schwalbe / Continental / Vittoria / WTB. |
Saddle | Choice of Fizik options. Other brands available on request. |
Seatpost | MASON Penta carbon, microadjust. |
Clamp | MASON Macro alloy. |
Handlebar | Select From: Deda & Ritchey. Other brands available on request. |
Bar Tape | MASON Contact Tape. |
Stem | Select Various Lengths. Choose From: DEDA ZER0100 or ZERO2 - Black on Black. |