Wheels Manufacturing Derailleur Hanger - 321 Trek Teeth-36 These custom T-20 bolts are

These custom T-20 bolts are direct replacements

Unit selection: N-m

See the chart to determine the appropriate skin length

Measure speed

37 BB/Frame Interface English BB Shell Width (mm) 68 BB Shell Width (mm) 73 Weight 105 Spindle Interface Type Shimano Hollowtech II Spindle Interface Type RaceFace EXI Spindle Interface Type FSA MegaExo Defined Color Purple

Wheels Manufacturing Derailleur Hanger - 321 Trek Teeth-36 These custom T-20 bolts areWheels Manufacturing Derailleur Hanger 321 Trek. 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