It doesn't take a Ph. D. to look at the paperwork on the 2015 Yeti ASR Carbon X01 Complete Bike with ENVE Wheels to deduce that this thing can rip apart almost any trail, and quickly. It's true that Yeti's most current reputation has been forged in the world of all-mountain big rigs and gravity riding, but be not misled. Yeti's heritage is deeply rooted in bikes that climb, too. The ASR Carbon frameset proudly continues this tradition, and pulls both new and old tricks out of its hat to put on an amazing show of technical prowess. For starters, carbon reigns supreme here. Where you won't find a fancy multi-link suspension platform, you find good reason. The single-pivot design saves major weight, and the rate-modifying link that guides the carbon "Loopstays" rear swing-arm teams up with a FOX FLOAT CTD rear shock on which Yeti worked obsessively with FOX to dial in the proper tune. Efficiency on the climbs and confidence on the descents is yours, as the linkage/shock combo make for a highly controlled but also reactive platform that feels bigger than it is. Throw a relatively low bottom bracket and a somewhat slack head tube angle into the mix with that efficiency -- nods to Yeti's downhill expertise