Zipp today has officially announced the release of its new disc brake-specific 303 Firecrest Disc and 202 Firecrest Disc road wheelsets. Both use the same stability-focused aero rim shapes as their rim brake cousins but with all-new hubsets that can be used on both quick-release and thru-axle road frames.
Claimed weight for the new 45mm-deep 303 Firecrest Disc Carbon Clincher is 1,645g, or 1,400g for the tubular version. For the shallower 32mm-deep 202 Firecrest Carbon Clincher it's 1,530g.
All three wheelsets spin on Zipp’s new 77-177D hubs, which mark a major departure for the company in terms of aesthetics and internal design. Instead of the smooth profile of other Zipp hubs, the 77-177D spoke flanges’ dramatic-looking star shape effectively increases their diameter to better transfer drive and brake torque. Inside, the design is decidedly conventional with two radial cartridge bearings up front and four out back, oversized aluminium axles, and tool-free interchangeable end caps to accommodate both quick-release and the majority of thru-axle frames.
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Claimed weight on the new Zipp 202 Firecrest Disc carbon clinchers is 1,530g per set
Gone is the threaded bearing preload system used on Zipp’s rim brake wheels in favour of a fixed adjustment.
You can read more at BikeRadar.com
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