From the manufacturer
 
The Alternator Rack 170/177 is the rear rack solution for all Salsa bicycles with 170/177mm - spaced Alternator dropout-equipped frames. Load up your panniers, get off the beaten track, and start exploring!
- NOTE: You will also need the Salsa Rack-Lock for frames without upper seatstay mount
 
- NOTE: Deck requires a minimum of 320mm clearance from seatstay mounting points
 
- Designed as a rear rack solution for Salsa frames that feature 170/177mm - spaced Alternator dropouts – mounts to the upper pivot bolt
 
- Compatible with Alternator 1.0 and 2.0 dropouts. Also fits Beargrease frames (Salsa Rack-Lock seatpost collar required)
 
- Tubular AL-6061-T6 construction
 
- 135 x 325mm cupped deck
 
- Extra-long struts for improved range of fit. Straight and shaped (kinked) struts included
 
- Large pannier hook stops
 
- Black powdercoat finish
 
- 59.5 lbs/27 kg maximum recommended load
 
- Mounting kit included
 
- 765g