Details:The Synthesis Enduro 11 - I9 Hydra 27.5 Boost Shimano Micro Spli is the first carbon wheel system designed specifically for enduro riding and racing. These wheels are finely tuned and optimized for the specific performance requirements and loads of mountain bike riding.The front wheel is compliant and tuned to improve handling, maximizing grip and control in turns. With a wider inner rim width, it supports a wider tire profile, increasing volume and contact patch, and enhancing turning capabilities.On the other hand, the rear wheel is stiff and finely tuned to support peak loads, enhancing stability and tracking at high speeds. With a narrower inner rim width, it supports a narrower tire profile, improving rolling resistance and sharpening tire edge for better grip.Specs:- Engagement: 0.52º quiet engagement / six pawls- ETRTO: 585mm (27.5), 622mm (29)- Hub: Industry Nine Hydra- Inner Rim Width: Front 31.5mm, Rear 29.5mm- Outer Rim Width: Front 37.5mm, Rear 36.5mm- Rim Height: 18mm- Spoke Count: Front 28, Rear 32- Spoke Type: Sapim CX-Ray (front), CX-Sprint (Rear)- Warranty: Lifetime (rim only)- Weight: 1760g per set (27.5), 1825g per set (29)These Synthesis Enduro 11 - I9 Hydra 27.5 Boost Shimano Micro Spli wheels from Crankbrothers are perfect for enduro riders looking for top-notch performance and reliability.