DEFINITION FRAMESET - Lightweight, Premium Dedacciai Aluminium Tubing
ESSENTIAL DIMENSIONS: RESOLUTION/DEFINITION
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.
Calliper Type: Resolution/Definition 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.
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: 12mm Thru-axle Front / 10mm QR rear / Rear axle spacing: 135mm.
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.
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.
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.
TAPER HEAD TUBE:
modern 1-1/8” - 1.5” taper head tubes with a large overall diameter for a useful weld area. The fully integrated headset with lightweight and 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.
The larger lower bearing leading to a tapered steerer and larger crown, which gives sharper response, helps reduce flex under braking and spreads bearing load.
Individually selected each tube, considering the influence that it will have on ride quality and overall performance. Use of a blend of tubing types, custom shapes and bends to help us achieve this goal.
Modern aluminium frames with 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 made in Italy.
Triple Butted, Hand Selected, custom shaped, 7000 series, Dedacciai Alu tubes and tig welded by hand with beautiful smooth weld beads without 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.
Unique to MASON. 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.
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.
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.
'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.
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:
We’ve developed a dial-able Thru axle with a familiar locking lever so you have a tool-free system for quick and easy thru axle removal. The positive locking action is a reassurance that your wheel is 100% secure and stiff enough for pin-point accuracy.
The Aperture2 fork also features replaceable inserts for the fork legs so if a thread is knackered you can replace this insert, not the fork. Anti-obsolescence is the driving theme here and durability, practicality and resilience thrive.
This frame is designed for disc brakes. They work consistently in all conditions 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.
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.
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.
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.
27.2 SEAT POST:
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.
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.
The following parts are provided with your frameset:
Deda Headset. Expander-bung for fork. M∆SON Macro clamp. Marine Grade Stainless bolts x 12. M∆SON 3D printed Structural Nylon BB guide inc screws. M∆SON 3D printed Structural Nylon mudguard mounts for fork x 2. Cable liner for front mech. Di2 rubber grommet 45º x 3. Rubber blanking grommet x 1.
MultiPort Inserts: Hose/outer x 4. Interrupted-outer x 2. Di2 x 2. Blank x 2.