The Synthesis DH11 - I9 Hydra 27.5 Pair SRAM XD by Crankbrothers is a top-quality mountain bike wheel system designed specifically for downhill riding. This innovative carbon wheel system features front and rear wheels that have been finely tuned and optimized to meet the unique performance requirements and demands of mountain biking. The front wheel is compliantly tuned to improve handling and ensure maximum grip and control when cornering. On the other hand, the rear wheel is stiffly tuned to handle peak loads and enhance stability and tracking at high speeds. With a quiet engagement of 0.52º and six pawls, you can expect smooth and reliable performance. The ETRTO measurements for the wheels are 585mm for the 27.5 size and 622mm for the 29 size. Powered by Industry Nine Hydra hubs, these wheels offer exceptional durability and performance. The inner rim width for both the front and rear wheels is 31.5mm, while the outer rim width is 38.7mm for the front and 39.5mm for the rear. The rim height is 18.75mm. The front wheel has 28 spokes, while the rear wheel has 32. These wheels feature Sapim CX-Ray spokes on the front and CX-Sprint spokes on the rear. You can rely on the lifetime warranty for the rims. In terms of weight, this set of wheels weighs 1945g for the 27.5 size and 1995g for the 29 size. Upgrade your mountain bike with the Synthesis DH11 - I9 Hydra 27.5 Pair SRAM XD by Crankbrothers for enhanced performance and an unbeatable riding experience.