Maximum Sprocket: 42T

Plus it is ponytail compatible

Stanchion diameter: 30mm

Flat-locked seams to minimize chafing and increase comfort

These are the same as the orignal jockey wheels found on 9000 or 9020 series derailleurs

Sun Ringle Duroc SD37 Rim - Black - 32 Hole - 27.5 Inch Envelope Shipping Maximum Sprocket: 42TReal world riders need wheels that roll fast and are durable enough to sustain years of abuse, without costing more than the rest of the bike. SUNRingl Droc SD rims do just that. The Droc SD series is the result of real world EWS racing and good ol' fashioned downhill thrash testing. Built to last with double wall construction and welded seams, there is a tubeless ready Droc rim to suit your wheel building needs. Who's this item for: Suitable for