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and shatterproof
Reflective sidewall stripe increases your visibility for oncoming motorists
Redesigned
This cassette is built with a strategic application of aluminum
Crafted of extremely strong
Aspero Apex Size:61 and shatterproofIn 2019, spero took the gravel world by storm, heralding a new era of speed in gravel. Fun, but flat out. The new spero remains true to its original brief, but with some improvements: a threaded BB shell, neater cable routing, and a UDH compatible derailleur hanger for those who want to use SRAMs Transmission drivetrains. And its more aero, of course. In the case of spero, aerodynamic performance is less about pure speed as a result of drag reduction,
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