Your Definition Shimano
THE LATEST EVOLUTION OF OUR UNIQUE MASON DEFINITION, WITH CONFIGURABLE SHIMANO BUILD OPTIONS
Already unique, the definitive sporty, all season, AllRoad Definition, has evolved further. Previously described as 'A masterclass in bike design and engineering' and 'Phenomenal' by road.cc, the latest version is even more refined, optimised and detailed for fast, variable surface speed and travel.
The MASON Definition is a game-changing bike, that excels in sportiness, all-season use, long-distance travel, AllRoad versatility, and performance. Sharing the overall geometry of our Columbus steel Resolution, it delivers a sportier feel while maintaining MASON's renowned long-distance comfort and dependability.
Crafted from premium Dedacciai aluminium, the frame ensures efficient pedalling and power transmission, featuring a low-weight, custom-shaped MASON x Dedacciai stays, and a large-diameter down tube for a responsive ride.
Since their launch, both the Resolution and Definition have been continually refined, staying true to their geometry and purpose, creating a category of their own. The Definition, optimised for long-distance and All-Season riding, has received updates without compromising its original magic.
Key changes in Definition 3.0 include revised hose and cable routing for modern components, dedicated dynamo cable routing ports for lighting systems, and optimised seat tube sizing across the range. Improved durability is achieved through uprated tubing treatment and accessory eyelets, ensuring resistance to harsh conditions.
Offering 8 frame size options (48cm to 62cm), our small bicycle company believes in providing a broad range for an optimised fit, essential for long-distance comfort and efficiency. The Definition continues to embody the same magical, refined, and dependable qualities that made it an all-year-round favourite since its debut in 2015.
Features
- Available with a choice of the best 700C tyres from Rene Herse, Schwalbe, Continental & Vittoria.
- Custom MASON x Dedacciai performance Aluminium frame with MASON Aperture2 full carbon fork. Thru-Axle/Flat-Mount, with replaceable F-Stop fork dropouts and MASON SwitchLever axles.
- Carbon MASON Penta microadjust seatpost and MASON Macro seatclamp.
- 700c, with capacity for 35mm tyres. 32mm with full mudguards [Dependant on wheel/tyre options].
- Fully and discretely eyeletted, with clearance for full mudguards and large volume tyres. Dedicated rack-mounts.
- Updated, CNC machined, pocketed dropouts and brake-mount. Stiff and durable for maximum power transfer, with engraved MASON logo and full depth rack mount.
- Fully compatible with full-length mudguards. Choose from SKS 35mm or PDW FullMetalFender 37mm.
- Available with a choice of HUNT, DT Swiss and Campagnolo wheelsets. Other options available on request.
- 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.
- Available with 'MASON Luminance Upgrade'. The ultimate dynamo + lighting set-up for all-terrain and multi-surface adventures. Select through Configurator.
- Optimised Seat Tube Sizing: Sizes 48 - 58cm use 31.8mm seat tube and 27.2mm seatpost. 60 & 62cm use oversize 34.9mm seat tubes and 31.6mm seatposts.
- MASON 'ThruBB' Ø56mm, internally routed bottom bracket shell.
- Select From: Shimano 105 mechanical / 105 Di2 / Ultegra / Ultegra Di2 / Dura Ace Di2
- Full set of high-grade, stainless steel accessory mounting screws and small parts, including cable routing parts and MASON Multiport inserts, supplied with frameset.
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 | 43.29 |
C > | BB DROP | 73 |
D > | REAR CENTRE | 420 |
E > | TT EFFECTIVE | 519 |
F > | TT ACTUAL | 502.3 |
G > | STACK | 532.1 |
H > | REACH | 369.7 |
I > | STAND-OVER | 741.4 |
J > | OFFSET | 45 |
K > | TRAIL Trail data for more wheel/tyres in full geo. chart (where applicable) |
69.5 |
L > | FORK CROWN HEIGHT | 380 |
M > | HEAD ANGLE | 71 |
N > | HEAD TUBE LENGTH | 120 |
O > | SEAT TUBE ANGLE | 74.5 |
P > | WHEELBASE | 989 |
Q > | HANDLEBAR (OUTSIDE DIMENSION) | 40/42 |
(mm unless specified) |
Dimensions ||
---|---|---|
A > | SEAT TUBE C/T | 500 |
B > | SEAT TUBE C/C | 452.7 |
C > | BB DROP | 73 |
D > | REAR CENTRE | 420 |
E > | TT EFFECTIVE | 532.8 |
F > | TT ACTUAL | 516.8 |
G > | STACK | 543.3 |
H > | REACH | 380.6 |
I > | STAND-OVER | 756.5 |
J > | OFFSET | 45 |
K > | TRAIL Trail data for more wheel/tyres in full geo. chart (where applicable) |
66.3 |
L > | FORK CROWN HEIGHT | 380 |
M > | HEAD ANGLE | 71.5º |
N > | HEAD TUBE LENGTH | 130 |
O > | SEAT TUBE ANGLE | 74.5º |
P > | WHEELBASE | 999.1 |
Q > | HANDLEBAR (OUTSIDE DIMENSION) | 40/42 |
(mm unless specified) |
Dimensions ||
---|---|---|
A > | SEAT TUBE C/T | 520 |
B > | SEAT TUBE C/C | 473.0 |
C > | BB DROP | 73 |
D > | REAR CENTRE | 420 |
E > | TT EFFECTIVE | 537.4 |
F > | TT ACTUAL | 522.7 |
G > | STACK | 552.8 |
H > | REACH | 382.5 |
I > | STAND-OVER | 770.8 |
J > | OFFSET | 45 |
K > | TRAIL Trail data for more wheel/tyres in full geo. chart (where applicable) |
66.3 |
L > | FORK CROWN HEIGHT | 380 |
M > | HEAD ANGLE | 71.5º |
N > | HEAD TUBE LENGTH | 140 |
O > | SEAT TUBE ANGLE | 74.5º |
P > | WHEELBASE | 1004.1 |
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 | 71.5 |
D > | REAR CENTRE | 420 |
E > | TT EFFECTIVE | 551.5 |
F > | TT ACTUAL | 536.3 |
G > | STACK | 565.5 |
H > | REACH | 383.0 |
I > | STAND-OVER | 787.3 |
J > | OFFSET | 45 |
K > | TRAIL Trail data for more wheel/tyres in full geo. chart (where applicable) |
66.3 |
L > | FORK CROWN HEIGHT | 380 |
M > | HEAD ANGLE | 71.5º |
N > | HEAD TUBE LENGTH | 155 |
O > | SEAT TUBE ANGLE | 73.5º |
P > | WHEELBASE | 1009.6 |
Q > | HANDLEBAR (OUTSIDE DIMENSION) | 44 |
(mm unless specified) |
Dimensions ||
---|---|---|
A > | SEAT TUBE C/T | 560 |
B > | SEAT TUBE C/C | 513.6 |
C > | BB DROP | 71.5 |
D > | REAR CENTRE | 420 |
E > | TT EFFECTIVE | 561.1 |
F > | TT ACTUAL | 546.7 |
G > | STACK | 579.7 |
H > | REACH | 388.3 |
I > | STAND-OVER | 804 |
J > | OFFSET | 45 |
K > | TRAIL Trail data for more wheel/tyres in full geo. chart (where applicable) |
66.3 |
L > | FORK CROWN HEIGHT | 380 |
M > | HEAD ANGLE | 71.5º |
N > | HEAD TUBE LENGTH | 170 |
O > | SEAT TUBE ANGLE | 73.5º |
P > | WHEELBASE | 1019.7 |
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 | 71.5 |
D > | REAR CENTRE | 420 |
E > | TT EFFECTIVE | 581.3 |
F > | TT ACTUAL | 566.9 |
G > | STACK | 591.1 |
H > | REACH | 394.7 |
I > | STAND-OVER | 818.1 |
J > | OFFSET | 45 |
K > | TRAIL Trail data for more wheel/tyres in full geo. chart (where applicable) |
63.2 |
L > | FORK CROWN HEIGHT | 380 |
M > | HEAD ANGLE | 72º |
N > | HEAD TUBE LENGTH | 180 |
O > | SEAT TUBE ANGLE | 72.5º |
P > | WHEELBASE | 1024.7 |
Q > | HANDLEBAR (OUTSIDE DIMENSION) | 46 |
(mm unless specified) |
Dimensions ||
---|---|---|
A > | SEAT TUBE C/T | 600 |
B > | SEAT TUBE C/C | 554.0 |
C > | BB DROP | 70 |
D > | REAR CENTRE | 420 |
E > | TT EFFECTIVE | 586 |
F > | TT ACTUAL | 574.3 |
G > | STACK | 599.1 |
H > | REACH | 396.8 |
I > | STAND-OVER | 833.1 |
J > | OFFSET | 45 |
K > | TRAIL Trail data for more wheel/tyres in full geo. chart (where applicable) |
63.2 |
L > | FORK CROWN HEIGHT | 380 |
M > | HEAD ANGLE | 72º |
N > | HEAD TUBE LENGTH | 190 |
O > | SEAT TUBE ANGLE | 72.5º |
P > | WHEELBASE | 1030.2 |
Q > | HANDLEBAR (OUTSIDE DIMENSION) | 46 |
(mm unless specified) |
Dimensions ||
---|---|---|
A > | SEAT TUBE C/T | 620 |
B > | SEAT TUBE C/C | 574.3 |
C > | BB DROP | 70 |
D > | REAR CENTRE | 420 |
E > | TT EFFECTIVE | 601 |
F > | TT ACTUAL | 588.8 |
G > | STACK | 620.1 |
H > | REACH | 405.5 |
I > | STAND-OVER | 853.2 |
J > | OFFSET | 45 |
K > | TRAIL Trail data for more wheel/tyres in full geo. chart (where applicable) |
60 |
L > | FORK CROWN HEIGHT | 380 |
M > | HEAD ANGLE | 72.5 |
N > | HEAD TUBE LENGTH | 210 |
O > | SEAT TUBE ANGLE | 72.5 |
P > | WHEELBASE | 1040.2 |
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.
EN Tested
All our frames and forks complete the brutal strength and fatigue testing to comply fully with EN regulations. They are pushed, pulled, dropped and twisted over 100,000 times and must survive without any damage before they can pass.
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.
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.
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.
Aperture2 Fork
Designed and tooled for by us and unique to MASON. This frame is fitted with our beautiful 'Aperture2' 365g, Ø12mm thru-axle/flat-mount, monocoque carbon fork.
Features: Mason F-Stop axle system including replaceable axle inserts, TrueTaper steerer, Internal Routing for Dynamo and brake-hose, Full mudguard clearance, space for 32mm tyres + 'guards [up to 35mm without 'guards, depending on rim/tyre spec] Custom layup UD carbon construction, discrete eyelets.
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.
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.
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.
8 FRAME SIZES
8 frame size options are unusual for a small bicycle company like ours. We believe that a large size range helps to guarantee an optimised fit, essential for long-distance comfort and efficiency. 48cm through to 62cm, the geometry and clearances vary throughout the size range, meaning that there will be a MASON to fit you perfectly.
DEDICATED DYNAMO ROUTING
We often fit modern dynamo lighting and charging systems to our builds, so we have added dedicated dynamo cable routing ports to the top tube, using the space freed up by refining the cable routing. This important feature means that the cable is more easily routed between front and rear lights and gives alternative mounting points, either at the seatclamp or dropout, depending on rack and bag setup and requirements.
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.
Essential Dimensions: Resolution/Definition/Aspect
BRAKING
Resolution Rotor Size: The fork can take a Ø140 or Ø160mm rotor [using adaptor], if you are using Shimano IceTech rotors then Ø140mm rotors either end are fine in normal use, although Shimano recommend Ø160 both ends for larger riders or extended long descents, especially when loaded. SRAM recommend Ø160mm front/rear. A Ø160mm up front is best if you are using cable braking. The Resolution2, with Thru-Axle front & rear will now accept a Ø160mm rotor on the rear. [140mm is the maximum recommended diameter for the V1 rear].
Resolution Caliper Type: Frames are fitted with the Flat-Mount front & rear (adaptable to post-mount with correct adapter). There are no clearance issues with modern Shimano or SRAM hydraulic systems or mechanical systems such as ‘TRP Spyre’. Some bulky systems like the ‘TRP HyRd’ may have compatibility issues on smaller size frames. Please contact us for advice if you are in doubt.
Resolution Flat-Mount Mounting Bolt Lengths: FRONT - 15mm. REAR - SRAM: 17mm. Shimano: 23mm.
Definition Rotor Size: The fork can take a Ø140 or Ø160mm rotor [using adaptor], if you are using Shimano IceTech rotors then Ø140mm rotors either end are fine in normal use, although Shimano recommend Ø160 both ends for larger riders or extended long descents, especially when loaded. SRAM recommend Ø160mm front/rear. A Ø160mm up front is best if you are using cable braking. 160mm is the maximum recommended diameter for the rear.
Definition Caliper Type: Frames are fitted with the flat-mount front and flat-mount rear. There are no clearance issues with modern Shimano systems or mechanical systems such as ‘TRP Spyre’. Some bulky systems like the ‘TRP HyRd’ may have compatibility issues on smaller size frames.
Definition Flat-Mount Mounting Bolt Lengths: FRONT - 15mm. REAR - SRAM: 22mm, using 2mm spacer under bolt head. Shimano: 28mm, using 2mm spacer under bolt head. Please contact us using the 'Technical' dropdown if you require further information regarding spacers and caliper mounting.
Aspect Rotor Size: The fork can take a Ø140 or Ø160mm rotor [using adaptor], if you are using Shimano IceTech rotors then Ø140mm rotors either end are fine in normal use, although Shimano recommend Ø160 both ends for larger riders or extended long descents, especially when loaded. SRAM recommend Ø160mm front/rear. A Ø160mm up front is best if you are using cable braking.
Aspect Caliper Type: Frames are fitted with the Flat-Mount front & rear (adaptable to post-mount with correct adapter). There are no clearance issues with modern Shimano or SRAM hydraulic systems or mechanical systems such as ‘TRP Spyre’. Some bulky systems like the ‘TRP HyRd’ may have compatibility issues on smaller size frames. Please contact us for advice if you are in doubt.
Aspect Flat-Mount Mounting Bolt Lengths: FRONT - 15mm. REAR - SRAM: 27mm. Shimano: 33mm.
Bolt lengths for mounting Flat-Mount brake calipers to our frames vary because of the different dropout designs and materials used across our range.
We always recommend using genuine hardware and consulting us directly using the 'Technical' dropdown, or using a qualified cycle mechanic if in doubt.
NOTE: Our frames are compatible with most modern disc-brake systems but may not be suitable for ALL brake callipers. Please check clearance before purchasing your braking system.
WHEELS/AXLES
Resolution2:
Ø12mm Thru-axle Front / Ø12mm Thru-axle rear.
Front axle spacing: 100mm. Rear axle spacing: 142mm.
Axle length/pitch: Front - 120mm/1.5P. Rear - 166mm/1.5P.
Definition2 >:
Ø12mm Thru-axle Front / Ø12mm Thru-axle rear.
Front axle spacing: 100mm. Rear axle spacing: 142mm.
Axle length/pitch: Front - 120mm/1.5P. Rear - 160mm/1.5P.
Aspect:
Ø12mm Thru-axle Front / Ø12mm Thru-axle rear.
Front axle spacing: 100mm. Rear axle spacing: 142mm.
Axle length/pitch: Front - 120mm/1.5P. Rear - 172mm/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.
Resolution/Definition/Aspect:
Max tyre width with mudguard: 32mm [Dependant on rim/tyre/mudguard combination].
Max tyre width without mudguard: 35mm - untreaded. [Dependant on rim/tyre/mudguard combination].
Resolution/Aspect:
SEAT POST
27.2mm.
SEAT CLAMP
31.8mm.
FRONT MECH
31.8mm
Definition3:
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.
Resolution/Definition/Aspect:
CHAINRINGS
Max 2x chainring size: 52/36T
Max 1x Chainring size: 50T
BB TYPE
68mm shell width. BSA threaded.
FORK
Headset type: Integrated, 41.8Ø upper, 51.8Ø lower, for taper head tube. Angular Contact Bearings. The head-tube seat angle is 45º.
Stack-washer maximum: 40mm below stem is max. recommended for carbon steerer. Warranty is void above this dimension.
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 Aluminium. |
Fork | MASON Aperture2 full carbon fork. |
Headset | Select From: Deda & Chris King. |
Colours | SensorBlue / ShutterBlack Metallic / Vela. |
Bike Weight | 52cm, with Ultegra Di2 - 8.4kg |
Sizes | 8 Sizes: 48 / 50 / 52 / 54 / 56 / 58 / 60 / 62. |
Chainset | 50/34. Select From: 105 12spd Mechanical / 105 12spd Di2 / Ultegra 11spd / Ultegra Di2 12spd / Dura-Ace Di2 12spd. |
Shifting | Shimano 105 / Ultegra / Dura-Ace - As Selected. |
Cassette | 11-34. 105 / Ultegra / Dura-Ace - as selected. Alternative ratios available on request. |
Chain | Shimano 105 / Ultegra / Dura-Ace - as selected. Other options available on request. |
Wheels | Select From: HUNT / DT Swiss / Campagnolo. Other options available on request. |
Tyres | 700c. Select From: Rene Herse / Schwalbe / Continental / Vittoria. |
Braking | Shimano 105 / Ultegra / Dura-Ace - as selected. Other options available on request. |
Saddle | Choice of Fizik options. Other brands available on request. |
Seatpost | MASON Penta carbon, microadjust. |
Clamp | MASON Macro alloy. |
Handlebar | Choice of Deda options. Other brands available on request. |
Bar Tape | MASON Contact Tape. |
Stem | Select Various Lengths. Choose From: DEDA ZER0100 or ZERO2 - Black on Black. |