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Custom Factor Bike Builds
Build your bike today!
Some brands build bikes. Factor builds obsession.
Born out of a Formula 1 engineering house in Norfolk, England, Factor brings motorsport-grade precision to every frame — designed, prototyped, and manufactured in-house, with zero compromise between speed, aerodynamics, and ride feel. At 661 Bike Service, we're proud to bring that same standard to our shop floor.
Come Ride One
Photos and spec sheets only tell half the story. Stop by the shop to see our current Factor lineup, talk through sizing and builds, and take one out for a test ride.
Why We Sell Factor
Engineering-first, always.
Factor controls every stage of production, from carbon layup to final assembly. That means faster iteration, tighter tolerances, and bikes that ride exactly as they were designed to.
Race-proven.
Factor frames have carried riders to wins at the Tour de France, Paris-Roubaix, and Unbound Gravel. This isn't marketing — it's a bike that's been tested where it matters most.
A model for every rider.
Whether you're chasing podiums or exploring backroads, there's a Factor built for how you ride:
- OSTRO: the aero road weapon, built for speed on race day
- O2: lightweight, all-around road performance for climbers and racers alike
- ONE: the do-it-all endurance road bike
- Vista: a true all-road machine for gravel, backroads, and everything in between
- Slick: nimble and quick, built for urban riding and criteriums