MR Grease Kids These cassettes are optimized for

These cassettes are optimized for off-road and feature PowerGlide II shift technology for smooth and positive shift performance with minimal additional weight

Shimano's Ultegra bottom bracket uses Pro Tour-proven technology for lighter weight and super smooth spinning

Cassette Cogs:11-13-15-17-19-21-24-27-31-35-40

machined brake surface Spokes: 14G Stainless steel Hubs: Alloy hub with bolt-on axle Weight: 32 lbs

Its compact shape is designed to be used on bikes with wide tires and steep chainstay angles so you get awesome shifting with less chain drag

MR Grease Kids These cassettes are optimized for(MR) Micro Resistance Polymer Technology is the ultimate in protection & performance for cup and cone bearings, head set bearings, suspension forks & shocks. With several compound used in aerospace, the new and improvedPRO Xformula is lighter viscosity while maintaining higher protection then other greases. PRO X MR Grease has less than 3% VOCs. PRO X MR Greaseuses polymerization to create a barrier of grease at the contact points which reduces wear,