e*Thirteen e*Spec Chain guide for 52mm Chain line for Bosch
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Provides confident and consistent pedaling over rough terrain.
Genuine replacement parts
The e*thirteen chain guide developed with Bosch helps keep the chain locked on the chainring when pedaling over rough terrain.
- Two-bolt nylon backplate mounts directly to Bosch motor
- 34-38 tooth compatibility
- Does not fit traditional ISCG mounts
- Designed for Trek 2020-2021 and select 2022 Rail & Powerfly models
- Included hardware is available separately to convert to 55mm chainlines (See Service Parts)