Definition Ultegra Hydro £3,130.00

Size

Colour

  1. Shutter Black
  2. Lens Blue
  3. Element Grey

Definition Ultegra Hydro

NOW WITH  'Aperture2' Thru-Axle/Flat-Mount fork and the latest Thru-Axle/Flat-Mount dropouts.

Dependable, durable and precise Ultegra R8000 drivetrain teamed with powerful hydraulic braking. The lightweight cable action of Shimano’s latest R8020 shifters is really enhanced by the carefully thought out, smooth internal cable-runs of our Definition frame. Our MultiPort adaptable routing system keeps the cables and hoses out of harms way through all seasons and makes uprating and cable changing easy. 

This is the bike for getting places fast, with the inspiring efficiency of modern braking and shifting. An addictive combination that will have you searching for new and challenging routes.

"It makes you feel special like you haven't got a care in the world" - road.cc April '15

Features

  • Dedacciai performance Aluminium frame with Mason Aperture2 full carbon Thru-Axle/Flat-Mount fork and the latest Thru-Axle/Flat-Mount dropouts.
  • Unique Mason MultiPort adaptable internal routing.
  • Mason 'ThruBB' 50Ømm, internally routed bottom bracket shell.
  • Shimano Ultegra R8000, 11speed drivetrain.
  • Precise mechanical shifting.
  • Powerful Hydraulic Disc-brakes.
  • Run-cool, Shimano IceTech rotors.
  • Lightweight alloy Deda RHM02 bars and Zero2 stem.
  • Large volume Schwalbe tyres designed for maximum speed, ride quality and all-surface control. Supplied with tubes but can be set-up tubeless.
  • UK designed, Carbon rail Fabric Scoop Pro saddle.
  • Carbon Mason Penta microadjust post and Mason Macro clamp.
  • Fully and discretely eyeletted for rack and ‘guards.
  • Clearance for full mudguards with 30mm tyres.

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. We can also supply our complete bikes with 11/32 gearing options, please contact us to discuss this.

See full geometry chart for details.

Order this bike Or ask us a question

Images may not exactly represent final bike build. See ‘Specifications’ for full listing.

Technical info

Select size
 

Dimensions
(mm unless specified)
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 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
Dimensions
(mm unless specified)
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 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
Dimensions
(mm unless specified)
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 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
Dimensions
(mm unless specified)
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 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
Dimensions
(mm unless specified)
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 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
Dimensions
(mm unless specified)
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 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

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.

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

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.

Fork

Unique to MASON. This frame is fitted with our new 'Aperture2' 365g, Ø12mm thru-axle/flat-mount, monocoque carbon fork. Features: Mason F-Stop axle system including replaceable axle inserts and clockable axle, TrueTaper steerer, Internal Routing, Full mudguard clearance, space for 30mm tyres + 'guards, Custom layup UD carbon construction, discrete eyelets.

F-Stop Axle System

The Mason F-Stop Axle System was developed for our exclusive Aperture2 fork, used on our Definition, Resolution and Aspect bicycles.

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.

The Aperture2 fork also features removable tip inserts meaning that all wearing parts are replaceable, vastly extending the life of your Mason bicycle.

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.

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.

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.

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.

 

Thru-Axle Front & Rear

This frame uses our ‘F-Stop’ thru-axles front and rear. This system is clockable to your desired position, so you have a tool-free and serviceable thru-axle with a familiar QR-style lever system. 
Rear threads are replaceable if damaged.

Essential Dimensions: Resolution/Definition

BRAKING

Resolution Rotor Size: The fork can take a 140 or 160mm rotor [using adaptor], if you are using Shimano IceTech rotors then 140mm rotors either end are fine. A 160 up front is best if you are using cable braking. 140mm is the maximum recommended diameter for the rear.

Resolution Caliper Type: Frames are fitted with the flat-mount front (adaptable to post-mount with supplied adapter) and post-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 Rotor Size: The fork can take a 140 or 160mm rotor [using an adaptor]. We recommend using 140mm front & rear when sing Shimano Ice-Tec rotors and 160mm front & rear when using SRAM. We recommend using 160mm rotors on the fron wheel 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.

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

Resolution: 12mm Thru-axle Front / 10mm QR rear.

Resolution: Rear axle spacing: 135mm.

Definition: 12mm Thru-axle Front / 12mm Thru-axle rear.

Definition: Rear axle spacing: 142mm.

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:

Max tyre width with mudguard: 30mm.

Max tyre width without mudguard: 33mm (untreaded).

SEAT POST

27.2mm.

SEAT CLAMP

31.8mm.

FRONT MECH

31.8mm

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 performance Aluminium.
Fork Mason Aperture full carbon fork.
Headset DEDA Low profile, carbon top cover, integrated headset.
Colours Lens Blue. Shutter Black. Element Grey
Bike Weight 54cm - 9.4kg
Sizes 50, 52, 54, 56, 58, 60.
Shifting Shimano Ultegra Mechanical R8020. 11spd.
Chainset Ultegra R8000 50/34.
Chain Ultegra R8000 11spd.
Cassette Ultegra R8000 11 spd 11-28.
Wheels MASON x HUNT 4Season disc wheels.
Tyres Schwalbe G-One 30mm / Pro-One 28mm
Braking Shimano BR-8070 Hydraulic with IceTech 140mm rotors.
Handlebar DEDA RHM 02 black on black. 295g.
Stem DEDA ZER02 black on black. 140g.
Bar Tape Fabric Knurl tape.
Saddle Fabric Scoop, Shallow, Pro Carbon. 189g.
Seatpost MASON Penta carbon, microadjust.
Clamp MASON Macro alloy ultralight.