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1

Measure the inner diameter of the headtube, both upper and lower. These are the key measures in combination with the fork dimensions. You probably want to confirm that the angle of the inner chamfer angles are 45 degrees (and not 36) as well. Once you have those measurements you can start searching. Note that it says "integrated" (= IS) on the Aventon page, ...


2

I'm pretty sure that the stress of changing worn-out press-fit cups does more damage to a head tube than the drop-in integrated variety. Changing a set of cups on a frame is a high-stress, creaking, cracking job requiring dedicated tools with lots of mechanical advantage. If you don't use the right tools you need to use a hammering action, which is even ...



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