Skip to main content
Due to the unfortunate COVID-19 Pandemic, we are currently experiencingunprecedented volume of online orders.
As we are doing our very best to process them quickly, 
please expect to see some delays at this time.
Thank you for your understanding and patience.

Specialized Rear Rack Seat Collar

Specialized Rear Rack Seat Collar
Please select options


Add a rack to your frame, even if you don’t have rack mounts. Allows standard rack stays to be bolted directly to the seat collar, for a clean and simple look. Made from lightweight aluminum for durability, with threaded inserts to bolt the stays directly into the seat clamp.

- 35mm inner diameter fits all alloy Specialized MTB frame designs with 30.9mm posts and 35mm O.D. seat tubes.
- 37mm inner diameter fits all carbon Specialized MTB frame designs with 30.9mm posts and 37mm O.D. seat tubes.

Part Numbers

Option UPC MPN Store SKU
Black / 29.8mm 888818234660 28217-9051 654-0018+1
Black / 31.6mm 888818084173 28216-9051 654-0018+3
Black / 31.8mm 888818234677 28217-9052 654-0018+4
Black / 34.9mm 888818084791 28216-9053 654-0018+6
Black / 32.6mm 888818084951 28216-9052 654-0902