KTM Ultra Force 27.5 Mountain Bike - 2015. KTM isn't a brand you hear about too often on this side of the Atlantic. But the Austrian company is one of those hidden gems that occasionally emerges out of Europe to remind you why they continue to be the center of cycling. Originally (and still) a maker of high end motorsports bikes, KTM has brought its engineering prowess to bear on some of the most advanced mountain and road bikes around. Tested in the Austrian Alps, proven in racing, and ready to take your performance to the next level. . The KTM Ultra Force 27.5 mountain bike is an alloy hardtail Mountain Bike that's ready for fun, adventure, and discovering where the dirt can take you. The 6061 triple butted aluminum frame is stiff, lightweight, and highly durable--so it can take a beating on the trail and still keep going. When the trail gets tough, a RockShox 30 Gold TK 27.5 fork with 100mm of suspension travel helps smooth things out for an easier ride. Shifting duties are handled by Shimano's excellent Deore 3x10 groupset. With a crisp shifting action, legendary reliability, and excellent design, Deore has benefitted from a large flow of trickle down technology from both the pro-level XTR and competition-level XT groupsets. Braking is handed by the Deore M615 hydraulic disc brakes, which deliver smooth, powerful, easily modulated stopping power in all terrain and weather conditions. Rouding out the build are a set of premium Mavic XM319 tubeless rims laced to Shimano Deore M615 hubs, all wrapped up in Schwalbe Rocket Ron EVO 27.5x2.25 tires. Topping the bike is a KTM VL-3315 saddle, perched atop a KTM forged alloy 27.2mm seatpost.