Bokeh Rival 1X £2,795.00

Size

Colour

  1. Element Grey
  2. Flare Orange

700C or 650B

  1. THIS BUILD WITH 650B
  2. THIS BUILD WITH 700C
Pre-order for January '18

Bokeh Rival 1X

 

"Supreme on and off-road ability...it's easy to see where the extra money goes. The whole bike has been extremely well thought out and is sensational to ride."

"Using custom-formed and triple-butted Dedacciai aluminium tubing, the Bokeh presents an incredible ride that feels light enough to tackle the biggest hills and mountains around, but solid enough to be stable when loaded up."

BikesEtc. | November 2017.

Features

  • This bike is available with the Specially developed Mason x Hunt 650B AdventureSport wheelset as shown, or the tough and lightweight HUNT 700c GravelDisc wheels.
  • Fast rolling 700C x 35mm Panaracer GravelKing SK with a unique, advanced tread design, or large volume Panaracer Comet Hardpack 650B x 50mm tyres [depending on wheelsize ordered].
  • Dedacciai, custom formed, triple-butted performance Aluminium frame with Mason Parallax full carbon Thru-Axle fork.
  • Unique Mason MultiPort adaptable internal routing.
  • Mason 'ThruBB' 50Ømm, internally routed bottom bracket shell.
  • Complete SRAM Rival 1x HRD groupset
  • Clutched rear mech provides smooth, reliable shifting action in any situation.
  • Light and durable super wide 10-42t cassette.
  • High peformance F160/R160 2-piece centrelock floating rotors.
  • Triangulated Deda Zero1 stem with lightweight alloy Zero1 handlebar.
  • Mason x Fabric exclusive, UK designed, Alloy rail Fabric Scoop Elite saddle with colour matched saddle base.
  • Carbon Mason Penta microadjust post and Mason Macro clamp.
  • Fully and discretely eyeletted for rack and ‘guards.
  • Integrated Parallax fork-crown boss for fixed light set-ups.
  • Clearance for full mudguards.
  • 3rd Bottle cage bosses on the underside of the down tube designed to work seamlessly with Fabric bottles and tool kegs.

Details

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, but we can sometimes make sizing adjustments at your request.

See full geometry chart for details.

Order this bike Or ask us a question

Technical info

Select size
 

Dimensions
(mm unless specified)
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 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
Dimensions
(mm unless specified)
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 72
L > FORK CROWN HEIGHT 398
M > HEAD ANGLE 70.5
N > HEAD TUBE LENGTH 130
O > SEAT TUBE ANGLE 74
P > WHEELBASE 1021.8
Dimensions
(mm unless specified)
A > SEAT TUBE C/T 540
B > SEAT TUBE C/C 493.5
C > BB DROP 75
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 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
Dimensions
(mm unless specified)
A > SEAT TUBE C/T 560
B > SEAT TUBE C/C 513.7
C > BB DROP 75
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 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
Dimensions
(mm unless specified)
A > SEAT TUBE C/T 580
B > SEAT TUBE C/C 534.1
C > BB DROP 75
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 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
Dimensions
(mm unless specified)
A > SEAT TUBE C/T 60
B > SEAT TUBE C/C 554.2
C > BB DROP 75
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 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

This page gives you some guidelines based on height, but these are only a starting point for a proper bike fitting. The dimensions show the extremes of useable frame size based on height.

Sizing 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 even skill level are very different. This means that there will invariably be different frame size requirements, even for people of the same height and inseam.

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 I would always recommend having a proper bike fit done before committing, especially if you feel like you may be between sizes.

We have specified bar width, stem length, and crank length to be the best fit for the majority of riders on each frame size, but we can sometimes make adjustments to this at your request. Please contact us for advice, or just let us know your sizing requirements in the comments box at the checkout page.

If you are between 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.

Multiport

Unique to MASON. 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 are the first to bring this type of system to a performance steel frame. Interchangeable alloy parts allow five options:

1. Full cable outer. 2. Hydraulic Hose. 3. Split outer. 4. Electronic cable [e.g. Shimano Di2]. 5. 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.

ThruBB

'ThruBB' is unique to MASON. The large 50mmØ 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.

NOTE: This BB shell design requires the use of a bottom bracket with a 'sleeved' axle. Please contact us if you would like advice.

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.

F-Stop Axle System: Bokeh

The Mason F-Stop Axle System was developed for our exclusive Aperture2 fork and we now use the special axle for the Mason Parallax fork on the Bokeh and BokehTi.
The axle uses a positive-closure release lever, ensuring that the wheel is always securely and firmly mounted with the added advantage of a visual check for the lever closure and orientation.

The F-Stop system also includes a ‘clockable’ thread on the axle, meaning you can always position the release lever exactly where you want it.

Dedacciai Tubing

This frame 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 and stress relieved after welding.

27.2 Seat Post

Our oversize seat tubes don't house oversize seat posts. The large diameter seat tube helps the 'core-stability' of the frame but large, stiff seat posts don't help rider comfort. A 27.2mm post helps to dial out road-buzz and the smoother ride means you stay fresher for longer.

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.

Internal Routing

The cables, hoses and electronic shift control wires run through the frame tubes, 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 advatage 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 it's 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 is optimsed for large-volume treaded tyres, and is designed for 650B and 700C wheel sizes. Using the smaller 650B wheel means that you can fit a larger-volume treaded tyre, but with the same rolling radius as a 700C x 28mm wheel/tyre.

We've worked together with HUNT Bike Wheels to develop the tubeless-ready, extra-wide, 650B 'AdventureSport' wheelset: replaceable catridge 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. Designed for low-mount Fabric 'cageless' bottles and kegs (but of course suitable for traditional bottles and cages too), 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.

 

DForm Downtube

We worked with Dedacciai to design and tool for the exclusive Mason ‘DForm’ Ti down tube. 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 aluminium 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 a properly designed carbon-monocoque fork like the Parallax, the contemporary Aluminium frame is a formidable piece of kit.

Parallax Thru-Axle Fork

Unique to MASON. This frame is fitted with our ‘Parallax’ 465g, Ø12mm thru-axle/flat-mount, monocoque carbon fork. We develop our own custom tubing and wheels, so when it comes to the forks for our bicycles it makes total sense for us to design and tool up for our own fork too. We don’t want to compromise ride-feel, balance and performance by using an ‘off-the-shelf’ and generic product.
Features: Custom layup UD carbon construction, Mason F-Stop axle with clockable axle, allowing you to re-position the release lever as things bed in. TrueTaper steerer, sealed Internal Routing, dynamo light eyelet on crown, discrete eyelets for mudguard mounting. Huge clearance with full mudguard clearance even when using the largest tyres.

Recommended tyre sizing: 700c x 40mm [45mm Max.] 650b x 50mm/2” [2.1” Max.]

Essental Dimensions: Bokeh

BRAKING

Rotor Size: The fork can take a 140 or 160mm rotor [using adaptor]. We recommend no smaller than 160mm up front if you are using cable braking. 160mm is the maximum recommended diameter for the rear and the native rotor size is 140mm.

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.

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.

WHEELS + AXLE SPACING

12x100mm Thru-axle Front / 12x142mm Thru-axle rear.

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 'guards:

700C x 41mm | 650B x 50mm.

SEAT POST

27.2mm. / 31.6mm BokehTi

SEAT CLAMP

31.8mm. / 34.9mm BokehTi

FRONT MECH

31.8mm / 34.9mm BokehTi

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 Dedacciai custom-shaped performance Aluminium.
Fork Mason Parallax full carbon Thru-Axle fork.
Headset DEDA Low profile, integrated headset.
Colours Element Grey. Flare Orange.
Bike Weight 54cm 9.6kg
Sizes 50, 52, 54, 56, 58, 60.
Clamp MASON Macro alloy ultralight.
Seatpost MASON Penta carbon, microadjust.
Shifting SRAM Rival 1X.
Chainset SRAM Rival 1X 42T.
Cassette SRAM XG-1150.
Chain SRAM PC1130.
Braking SRAM Rival Flat-Mount Hydro.
Tyres 700C x 35mm Panaracer GravelKing SK / Panaracer Comet Hardpack 650B x 50mm.
Wheels HUNT Four Season Gravel Disc / Mason X HUNT 650B AdventureSport Disc.
Handlebar Deda Zero1.
Saddle Fabric Scoop, Bokeh Custom, Shallow, Elite Alloy. 260g.
Bar Tape Fabric Hex Tape, Black.
Stem Deda Zero1.