Cross country racing, both at the highest level and at regional races, has transformed from buff tracks that favor the strong to more technical demanding courses valuing both fitness and skill. These are certainly more fun to spectate and participate but as these track have become more technical, equipment needed to evolve. Current XC bikes have headtube angles and suspension travel that wouldn't have been out of place on legit trail bikes a decade ago. During this transformation, we have seen more aggressive and wider tires to withstand the punishing terrain and faster speeds. Rims have gotten wider on the road and the trail to meet the requirements of bigger tires as we learn more about rolling resistance and tire volume. Taking what it has learned in the lab and from racer feedback, ENVE constructs the M525 27. 5in Boost Wheelset for your lightweight hardtail or short travel dually and is superior to the previous M50 Fifty in every way. Starting with weight, the new rims are on average, 20 grams lighter for lightning quick accelerations and easing the load on extended climbs that you are sure to appreciate during marathon events. This particular build is for 27. 5-inch bikes and the hoops are laced to boost spaced DT Swiss 240 hubs. What you will experience is the fastest, no-holds barred race wheelset that is durable enough to train on everyday.ENVE received valuable feedback from their World Cup races and in house rippers when it came time to redesign the already excellent M50 rims. A goal of dropping weight was a priority as well as increasing the width for the newer crop of wider tires. Naturally durability could not falter and engineers actually looked at ways to increase rim reliability and reduce the risk of cutting lightweight tires often when run at lower pressure. In doing so, World Cup racers and the weekend warrior can enjoy the benefits that come from reduced air pressure and charge harder knowing that the rim can handle the abuse. The proof is i...