Bontrager Backrack Seatpost

Bontrager Backrack Seatpost


No Eyelets? No problem. Bolts to seatpost for quick set-up and secure cargo.


Quick-install rack

The perfect choice for frames without built-in eyelets, the versatile Bontrager Seatpost rear rack quickly attaches to your (non-carbon) post with an easy-to-use four-bolt design. Compatibility with Trek's Interchange System means it mates seamlessly with a variety of Interchange bags designed to install fast and securely.

Product details

  1. Designed to carry up to 20 lbs. (9kg)
  2. Compatible with Trek and Bontrager Interchange trunk hardware
  3. Fits both 27.2mm and 31.6mm seatposts
  4. Not compatible with carbon seatposts
  5. Not intended for use with child carriers



Compatible bike size 27.2/31.6mm
Rack type Rear racks
Attachment Interchange
Disc compatible Yes
Includes light mount No
Weight capacity 20 lbs (9 kg)
Material Aluminum
Weight 0.74kg


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**Weights are based off pre-production products at time of publication. Weights may vary in final production.