Profile 19mm Hop-Up American Bottom Bracket Set - Purple Anodized - USA Made 31.6mm They also have unique undercut

They also have unique undercut pads that give a slim comfortable feel with the ultimate amount of grip

This is made to fit Schwinn S5 and S6 26x1-1/4" (597mm) rims ONLY

Pressure Rating: 45-80 psi

The Kink Sever Tire (tread pattern IA-1176) features a simple

Profile 19mm Hop-Up American Bottom Bracket Set - Purple Anodized - USA Made 31.6mm They also have unique undercutFor frames with American BB shells, this Profile Hop Up Kit offers a finished look while providing cups, sealed bearings, a tube spacer, cone washers, and flat washers. The spacers and cups have an anodized finish. This bottom bracket will fit many popular 19mm cranks such as Profile Race, Redline Flight, Fit, DK Social and most any other 19mm crank. Formerly known as the American Bottom Bracket Kit with Hop Up. Color: Purple Manufacturer's Note: This