The third generation U.P. & U.P.P.E.R. frames are lighter, nimbler and more fun than ever. They also still pass our ultimate test: We only offer frames we want to ride ourselves. -With road tires, it is a very fast road bike -With big road/cross/gravel tires (32-40mm), it’s a go-anywhere bike perfect for mixed surface rides and most gravel routes With 650b mountain bike tires, it's unstoppable on very tough terrain yet much faster on pavement than you'd expect thanks to the road position Chainring(s), frame and tire all fight for space just behind the bottom bracket. Mountain (and some gravel) bikes solve this with a wider crank, but that hurts your pedal stance (Q-factor) and thus your pedaling efficiency. Instead we drop the right chainstay to move it out of this crowded area, allowing it to be wider and therefore stiffer (twice the width will give you eight times the stiffness!) -- Probably the most copied feature of the original U.P., but still few fully understand why and how to optimize this.
MONSTER TIRES, NIMBLE RIDE The OPEN U.P. inspired a generation of gravel bikes that could fit up to 2.1” tires. The WI.DE. (Winding Detours) can run even bigger tires while still fitting road cranks! The monster tires help you conquer the most extreme terrain, the performance geometry & narrow Q-factor keep you efficient while the steering geometry keeps you nimble. WHAT IS THE WI.DE.? --With 650b gravel or mountain bike tires up to 2.4”(61mm), rutted singletrack, slippery roots and loose rocks are no match --With 700c gravel tires up to 46mm, even the toughest gravel roads are tackled at lightning speed --With 700c road tires (we recommend 35-40mm wide), you have the most comfortable road bike ever invented
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