Enve Twenty7.5 AM Carbon Wheelset - $2,520.00

The mid-size, 27.5in wheel is finally building steam as 2012 is quickly becoming the year of the 650b mountain bike. Not surprisingly, Enve is at the forefront of this movement with its Twenty7.5 AM Carbon Wheelset, as it shares the same rim, spoke, and hubs as its 26 and 29in stable mates. Once, aluminum matrices and titanium ruled high-end mountain bike frames. However, the advancements of carbon fiber composites, manufacturing techniques, and polymers have boosted the wonder-weave's strength and durability to levels exceeding alloys. And in the case of Enve's carbon AM rims, proprietary molding techniques create full-carbon rims with strength and stiffness that bests alloy rims every step of the way. One ride will quickly convince you that carbon fiber's heightened wheel tension and stiff platform provide the best steering precision. The AM Wheelset isn't the lightest of Enve's mountain wheelsets, but they're plenty strong for aggressive trail riding -- while rivaling the weight of some alloy XC wheelsets. That's because Enve uses a special bladder system to increase the heat and pressure while molding the rims. This packs the layers tighter, as well as improving both the internal and external rim surfaces. And a place where Enve stands nearly alone in weight reduction, is that the bladders are actually removed once the mold is set, thus shedding, literally, useless weight at the rim. The AM Rims are made with another proprietary Enve design, uninterrupted carbon filaments. How' Well, Enve's molding process is so precise that it requires no post-cure drilling, bonding, or machining processes. In fact, the spoke and valve stem holes are created in-place during the molding process. This results in a final structure with long, intact, and continuous carbon filaments that distribute stress loads over their entire length. Basically, the principle at work here is that the longer the fiber, the greater the distribution of the stress. - $2,520.00