What Our Gearhead(R) Experts Are Saying:"For riders looking for the best of both worlds, the Hydra2 Grade-S MX 29/27. 5in Wheelset is the way to go. The 29in front wheel gives me smoother rolling speed and control, while the 27. 5in rear keeps handling snappy and responsive. Paired with Hydra2 hubs for instant engagement, this setup is perfect for fast, technical descents."Enduro and downhill riders looking for the ideal wheel combination will find it in the Hydra2 Grade-S MX 29/27. 5in Wheelset. The mixed-wheel setup (29in front / 27. 5in rear) offers the perfect balance of rollover speed, stability, and agility, giving us the confidence to charge into technical terrain at full speed. Hydra2 hubs provide ultra-fast 0. 41deg engagement, ensuring power transfer the moment we need it, whether sprinting out of corners or powering through rock gardens. The alloy construction delivers a balance of durability and compliance, while the 32-spoke build reinforces stiffness and strength for aggressive riding. Designed for Boost spacing (15x110mm front / 12x148mm rear) and available with an MS freehub, this wheelset is built for riders who demand the best in enduro and downhill performance.