OUR ALUMINIUM FAST FAR ENDURANCE MACHINE
Our Italian-made Dedacciai aluminium endurance road bicycle tackles the most variable and unpredictable surfaces with confidence and poise.
Select the tried-and-tested Definition3 or the new Definition Integrale, with clean, integrated routing and reworked, progressive geometry, for a fast attacking ride feel that doesn't compromise on long-distance comfort.
The way this thing rides is a masterclass in bike design and engineering
– road.cc ROAD BIKE OF THE YEAR & BIKE OF THE YEAR FINALIST 2024/25
RIDE-DRIVEN DESIGN
The MASON Definition is the fast-riding aluminium bicycle that epitomises our Fast Far ideology. Pushing at the outer limits of the ‘all-road’ category, the Definition shows how custom Dedacciai aluminium truly deserves its place in the realm of high performance endurance bicycles – traversing long distances on variable surfaces at high speed.
Race-proven, refined and improved over 10 years, the Definition has once again been reinvented. Redefined.
For the first time ever, the MASON Definition is now offered in two distinct versions, each with its subtle differences. Both Definitions offer the same vision of all-season performance, but tailored for you, whether you prioritise speedy handling or endurance-focussed versatility.
Definition Integrale
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Revised geomentry for a sportier, more attacking feel
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Fully integrated routing, giving the sleekest, cleanest lines, with no visible cables
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MASON x Deda AR carbon fork with the Deda DCR system
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Streamlined eyelets and fittings, retaining bottle and mudguard mounts
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Optimised for electronic shifting
Definition3
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Conventional internal routing
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MASON Aperture2 carbon fork
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Full range of eyelets and fittings, including rack and rear dynamo routing
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Compatible with all groupset options – electronic or mechanical
The Definition draws on the same dual-design approach as the titanium Aspect – expressing this same attention to multiple details, but crafted in aluminium. And the versatile Resolution remains the Definition’s steel sibling on the roads of the real world.
DEFINITION INTEGRALE: FIRST LOOK
DEFINITION3: A CLOSER LOOK