Our first spin on the Mason Definition II towards the end of last year left such a strong impression that, as soon as we got back to the office, it was very quickly pencilled in for the RCUK 100. It’s rare for a fledgling company to produce such a sublime ride after only three years, but then the Sussex-based brand is not your standard upstart and we've quickly become used to quality from Mason Cycles.

RCUK100 | 2018

3 in 3 - every model shortlisted! We're HONOURED to announce that our updated Definition2 model has cemented its place in history and proven its class-leading credentials by featuring in the 2018 edition of the prestigious RCUK100.

The first MASON to feature in this shortlist was back in 2016 - our award-winning Resolution. Last year our ground-breaking Bokeh stood out against the rest, and now our ultra-race-winning, all-season Dedacciai tubed Definition2 has earned its place.

Every single product to feature in the RCUK100 shortlist is handpicked by the passionate team behind RCUK, so we're honoured to be picked and to stand with strong company from the biggest names in the industry.


Pictured here in the range-topping SRAM Red eTap build, with the optional HUNT 30 CarbonAeroDisc wheelset.

More details on this model here.

The Definition II is available as a frame only or can come fully-built with an array of high-end components, allowing you to put together your dream build, like the SRAM Red eTap-equipped machine we've got here.

However the Mason Definition II is set up, one thing’s for sure - you’re left with a great all rounder that can be relied upon whatever the adventure.

Check out the full RCUK100 article here.

Demand for the Definition2 is going off right now, with sales and interest coming in internationally. Stay tuned to our social media channels to see the #FastFar adventures that Definitions are carrying people on across the world.

Thanks again RCUK for this inclusion and for the quality images.