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Genuine replacement parts

Get back on your bike with these replacement Bosch crank arms.

Product details

  1. Generation 2 Bosch systems use small (15-22t) chainrings without spiders
  2. Equipped with a chain ring guard for use without a frame mounted chain guard

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Size 170mm, No ring 175mm, No ring
Length 170mm 175mm
Teeth No ring No ring
Speed No ring No ring
BCD Direct Mount Direct Mount
Offset Standard Standard
Crank type ISIS ISIS
Threading 9/16"(15mm) 9/16"(15mm)
Material Aluminum Aluminum
Weight 250g 250g
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, and materials.
Weights are based off Trek pre-production products at time of publication. Weights may vary in final production.

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