Crankbrothers Synthesis Enduro Alloy 29" Wheel Tuned for control. Built for enduro. The Crankbrothers Synthesis Enduro Alloy wheel system applies the same tuned front-and-rear concept as the Carbon version in a more accessible 6013 T6 alloy package. Each wheel is designed specifically for its position on the bike - the front rim runs a wider 31. 5mm internal width for increased tire volume, contact patch, and cornering confidence, while the rear runs a narrower 29. 5mm width for a sharper tire profile, improved rolling resistance, and better stability under load. A welded and sleeved rim joint adds strength throughout. Industry Nine 1/1 hubs with 4deg engagement and position-specific Sapim spokes complete the build. Sold individually. Features Tuned front-and-rear alloy wheel system each wheel optimized for the specific performance demands of its position on the bike Front: 31. 5mm inner rim width for increased tire volume, contact patch, and cornering grip Rear: 29. 5mm inner rim width for a narrower tire profile, sharper edge grip, and improved rolling efficiency Welded and sleeved rim joint for additional strength and long-term durability Industry Nine 1/1 hub with 4deg engagement via dual phased-pawl drive mechanism Position-specific Sapim spokes D-Light up front for compliance, Race in the rear for stiffness and support Sold individually not in sets SPECIFICATIONSCompatibility Tubeless Ready / Compatible Hub Industry Nine 1/1Hub Type6-Bolt Engagement4degETRTO584mm (27. 5), 622mm (29)Rim Material6013 T6 Alloy Inner Rim Width - Front31. 5mm Inner Rim Width - Rear29. 5mm Rim Height20mm Spoke Count - Front28Spoke Count - Rear32Spokes - Front Sapim D-Light Spokes - Rear Sapim Race Weight - Front837g (27. 5) / 865g (29)Weight - Rear1, 018g (27. 5) / 1, 048g (29)Warranty2 Years (rim only) | Crankbrothers | Enduro Alloy 29" Wheel Front 15X110 6B | Aluminum