This frame is incredibly versatile, and further blurs the line between road and mountain bike disciplines as a class leading cyclocross bike. The 3 members of the U.P. (Unbeaten Path) range from OPEN all combine a road riding position with clearance for mountain bike tyres. Get yourself out of town on an adventure. Leave home on asphalt, then start grinding up gravel roads or carving down some flowy singletrack. Your riding position gets you there quickly and efficiently; the big tyres give you the grip and confidence you need to feel unstoppable. Every U.P. and U.P.P.E.R. frame shares the same shape, geometry, intended use and most importantly: tyre clearance. But they differ in the layup of the carbon fibre, weight, fork, disc brake mounts, thru-axles and colour. The Classic U.P. uses post-mount disc brake mounts, whilst the New U.P. and U.P.P.E.R. use flat-mount disc brake mounts. Tyre clearance This frame fits 27.5 (650B) mountain bike tyres up to 2.1 wide. But you can also fit a 40mm cross tyre, or a 28mm road tyre, or anything else in-between (exact tyre sizes depend on manufacturing tolerances and rim width, so this is a guideline. Always make sure you have 6mm clearance between tyre and frame). So youll hardly notice a difference in geometry swapping 700c cross/road and 650b mountain bike tyres on this frame, while 29er tyres with their significantly larger radius would make a total mess of the handling. There is a second reason Open designed for 650b and not 29er tyres. They would require very long chainstays, while this frame now sports a very short 420mm rear end, enabling much quicker, more responsive handling. Most gravel and cross bikes have longer chainstays than that yet they can't fit anywhere near the same size of tyre. Crank clearance
This frame is incredibly versatile, and further blurs the line between road and mountain bike disciplines as a class leading cyclocross bike. The 3 members of the U.P. (Unbeaten Path) range from OPEN all combine a road riding position with clearance for mountain bike tyres. Get yourself out of town on an adventure. Leave home on asphalt, then start grinding up gravel roads or carving down some flowy singletrack. Your riding position gets you there quickly and efficiently; the big tyres give you the grip and confidence you need to feel unstoppable. Every U.P. and U.P.P.E.R. frame shares the same shape, geometry, intended use and most importantly: tyre clearance. But they differ in the layup of the carbon fibre, weight, fork, disc brake mounts, thru-axles and colour. The Classic U.P. uses post-mount disc brake mounts, whilst the New U.P. and U.P.P.E.R. use flat-mount disc brake mounts. Tyre clearance This frame fits 27.5 (650B) mountain bike tyres up to 2.1 wide. But you can also fit a 40mm cross tyre, or a 28mm road tyre, or anything else in-between (exact tyre sizes depend on manufacturing tolerances and rim width, so this is a guideline. Always make sure you have 6mm clearance between tyre and frame). So youll hardly notice a difference in geometry swapping 700c cross/road and 650b mountain bike tyres on this frame, while 29er tyres with their significantly larger radius would make a total mess of the handling. There is a second reason Open designed for 650b and not 29er tyres. They would require very long chainstays, while this frame now sports a very short 420mm rear end, enabling much quicker, more responsive handling. Most gravel and cross bikes have longer chainstays than that yet they can't fit anywhere near the same size of tyre. Crank clearance
Open U.P.P.E.R Frame Kit Black Medium
This frame is incredibly versatile, and further blurs the line between road and mountain bike disciplines as a class leading cyclocross bike. The 3 members of the U.P. (Unbeaten Path) range from OPEN all combine a road riding position with clearance for mountain bike tyres. Get yourself out of town on an adventure. Leave home on asphalt, then start grinding up gravel roads or carving down some flowy singletrack. Your riding position gets you there quickly and efficiently; the big tyres give you the grip and confidence you need to feel unstoppable. Every U.P. and U.P.P.E.R. frame shares the same shape, geometry, intended use and most importantly: tyre clearance. But they differ in the layup of the carbon fibre, weight, fork, disc brake mounts, thru-axles and colour. The Classic U.P. uses post-mount disc brake mounts, whilst the New U.P. and U.P.P.E.R. use flat-mount disc brake mounts. Tyre clearance This frame fits 27.5 (650B) mountain bike tyres up to 2.1 wide. But you can also fit a 40mm cross tyre, or a 28mm road tyre, or anything else in-between (exact tyre sizes depend on manufacturing tolerances and rim width, so this is a guideline. Always make sure you have 6mm clearance between tyre and frame). So youll hardly notice a difference in geometry swapping 700c cross/road and 650b mountain bike tyres on this frame, while 29er tyres with their significantly larger radius would make a total mess of the handling. There is a second reason Open designed for 650b and not 29er tyres. They would require very long chainstays, while this frame now sports a very short 420mm rear end, enabling much quicker, more responsive handling. Most gravel and cross bikes have longer chainstays than that yet they can't fit anywhere near the same size of tyre. Crank clearance
This frame is incredibly versatile, and further blurs the line between road and mountain bike disciplines as a class leading cyclocross bike. The 3 members of the U.P. (Unbeaten Path) range from OPEN all combine a road riding position with clearance for mountain bike tyres. Get yourself out of town on an adventure. Leave home on asphalt, then start grinding up gravel roads or carving down some flowy singletrack. Your riding position gets you there quickly and efficiently; the big tyres give you the grip and confidence you need to feel unstoppable. Every U.P. and U.P.P.E.R. frame shares the same shape, geometry, intended use and most importantly: tyre clearance. But they differ in the layup of the carbon fibre, weight, fork, disc brake mounts, thru-axles and colour. The Classic U.P. uses post-mount disc brake mounts, whilst the New U.P. and U.P.P.E.R. use flat-mount disc brake mounts. Tyre clearance This frame fits 27.5 (650B) mountain bike tyres up to 2.1 wide. But you can also fit a 40mm cross tyre, or a 28mm road tyre, or anything else in-between (exact tyre sizes depend on manufacturing tolerances and rim width, so this is a guideline. Always make sure you have 6mm clearance between tyre and frame). So youll hardly notice a difference in geometry swapping 700c cross/road and 650b mountain bike tyres on this frame, while 29er tyres with their significantly larger radius would make a total mess of the handling. There is a second reason Open designed for 650b and not 29er tyres. They would require very long chainstays, while this frame now sports a very short 420mm rear end, enabling much quicker, more responsive handling. Most gravel and cross bikes have longer chainstays than that yet they can't fit anywhere near the same size of tyre. Crank clearance
