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Drilled cogs provide weight savings
In order to minimize weight and reduce rolling resistance the Pro One TT runs without a puncture guard
} Center Lock lockring only
41 Spindle Interface Type RaceFace EXI Spindle Interface Type Shimano Hollowtech II Spindle Interface Type FSA MegaExo Spindle Interface Type FSA MegaExo Light BB Shell Width (mm) 107 BB/Frame Interface BB107
Wheels Manufacturing Derailleur Hanger - 252 MPFN-KID633.O Drilled cogs provide weight savingsWheels Manufacturing Derailleur Hanger 252. Wheels Manufacturing hangers are stiffer than almost any OEM hanger which improves durability and shifting performance. OEM hangers are only produced by a handful of manufacturers mostly in Taiwan and China. As a result you will see many bikes with exactly the same hanger. Bicycle manufacturers may make mid year changes. Please use the hanger photos to select the proper hanger for your application. CNC
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