Last July, when Greg Martin rolled across
the finish line to win the 2009 Singlespeed World
Championships bike race in Canmore,
Alberta, one thing was missing from the rig he'd pedaled for 24 hours
straight: A bike chain.
Martin was riding a bike equipped with a
belt drive instead of a chain. As innovations in the world of cycling
go, the Carbon Drive System from Gates, a company in Denver, could be a
game changer.
The humble bike chain - greasy, gunk-prone,
finicky if not lubed and maintained - has been standard equipment for
decades. But belt drives, which employ a flexible loop of polyurethane
embedded with carbon-fiber cords, give bikers a new option.
Gates' belt drives (www.carbondrivesystems.com)
work with aluminum-alloy sprockets instead of traditional gears. It's a
setup similar to what's long been employed on motorcycles. Indeed,
Gates is a leading supplier of belts in the automotive industry, where
its products are used by companies like Harley-Davidson.
The Gates belt drive that Greg Martin used
to win is now seen on more than 40
bikes from major companies like Trek
and Raleigh to independent bike builders and custom shops. (Martin rode a
model made by Spot
Bicycles, a small company in Golden, Colo.) Gates touts advantages
that include a quieter ride, a stronger and lighter drivetrain component
set, and a maintenance-free "greaseless chain" that never requires
lube.
For the past month, I have been test
driving the belt-equipped Judan model from Norco, a company based in
Port Coquitlam, B.C. This tank of a bike includes 29-inch wheels and a
steel frame. It weighs about 25 pounds and is a single-speed model with a
front shock.
At $1,799, Norco sells the Judan
in one configuration only. Its Gates Carbon Drive System is set up with
a 46-tooth front sprocket and 28-tooth rear cog, which is about the
equivalent to a 32-tooth by 20-tooth traditional chain drive.
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