Crankbrothers Synthesis Alloy Enduro 29" Ft Disc Rim 28h BlkTuned alloy rims for Enduro riding and racing Front and rear specific rims are optimized to address the specific performance requirements and loads of mountain biking Compliant tuned 28 hole front rim improves handling and maximizes grip. Wider rim width supports a wider tire profile up front for more air volume and larger contact patch Stiff tuned 32 hole rear rim supports peak loads and enhances stability at speed. Narrower rim width supports a