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Genuine replacement parts

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

Product details

  1. Generation 3 Bosch systems use larger (36-38t) chainrings with spiders
  2. Includes both left and right crank arms

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Size 170mm, No ring
Length 170mm
Teeth No ring
Speed No ring
BCD Direct Mount
Offset Standard
Crank type Mini-ISIS
Threading 9/16"(15mm)
Material Aluminum
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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