Shimano SG-3R40 Internal Assembly for hubs with 189.4mm length Axle Model=Dura-Ace Track Cog Patterned sidewall adds abrasion protection

Patterned sidewall adds abrasion protection while maintaining casing suppleness Color Black TPI 60 Weight 350 Weight (oz) 12 Defined Color Black ISO Width (mm) 44 ISO Diameter 406 / 20" BMX Tire Intended Use BMX Tire Diameter 20" Tire Bead Wire Labeled Size 20 x 1

Double locking clip for easy and safe fixation and adjustment of the binding on the IFP (Integrated Fixation Plate)

Built around 37mm stanchions and a Reverse-Arch lower leg design with the Hexlock SL2 axle Mezzer Pro is the stiffest chassis in its category

Bolts to rear of rack creating a mounting surface below the rack

Having a good time

Shimano SG-3R40 Internal Assembly for hubs with 189.4mm length Axle Model=Dura-Ace Track Cog Patterned sidewall adds abrasion protectionShimano Internally Geared Hub and Dynamo Small Parts.