DetailsThe Synthesis DH11 - I9 Hydra 27.5 Pair Shimano, from the brand Crankbrothers, is a mountain bike's first tuned carbon wheel system created specifically for downhill riding. These front and rear wheels are tuned and optimized to meet the unique performance requirements and loads of mountain biking.The front wheel is compliant and tuned to enhance handling, providing maximum grip and control in turns. On the other hand, the rear wheel is stiff and tuned to support peak loads, improving stability and tracking at high speeds.Specifications- Engagement: 0.52º quiet engagement / six pawls- ETRTO: 585mm (27.5), 622mm (29)- Hub: Industry Nine Hydra- Inner Rim Width: Front 31.5mm, Rear 31.5mm- Outer Rim Width: Front 38.7mm, Rear 39.5mm- Rim Height: 18.75mm- Spoke Count: Front 28, Rear 32- Spoke Type: Sapim CX-Ray (front), CX-Sprint (Rear)- Warranty: Lifetime (rim only)- Weight: 1945g per set (27.5), 1995g per set (29)