S-Works Future Stem Size:31.8X70-6D precision engineered steel cogs permanently

precision engineered steel cogs permanently connected with high-strength stainless steel pins

it has performance characteristics that far exceed many competitor's race tires

Making its debut on the all-new Roubaix

Riders have been asking for a tire that can enhance speed

you know you’ll find your perfect fit

S-Works Future Stem Size:31.8X70-6D precision engineered steel cogs permanentlyMaking its debut on the all new Roubaix, the S Works Future stem is the stiff, lightweight upgrade that your Roubaix has been waiting for. Its compatible with all Future Shocks and our Specialized accessory mount, and its sleek design will create a seamless integration.