Details Mountain bike's first tuned carbon wheel system for enduro riding and racing. Front and rear specific wheels tuned and optimized to address the specific performance requirements and loads of mountain bike riding. Compliant tuned front wheel improves handling and maximizes grip and control in turns. Wider inner rim width supports wider tire profile in front, increased volume and contact patch, and rounds tire profile to enhance turning. Stiff tuned rear wheel supports peak loads and enhances stability and tracking at speed. Narrower inner rim width supports narrower tire profile in rear, improves rolling resistance, and sharpens tire edge for grip. Specs engagement 17º (x6) ETRTO (27.5) 585mm ETRTO (29) 622mm hub Synthesis Standard inner rim width front 31.5mm inner rim width rear 29.5mm outer rim width front 37.5mm outer rim width rear 36.5mm rim height 18mm spoke count front 28 spoke count rear 32 spokes front Sapim D-Light spokes rear Sapim Race warranty lifetime (rim only) weight per set (27.5) 1845g weight per set (29) 1905g