• Thanks all, that's very useful advice. Will have a go at removing the fork this morning for closer inspection. If I understand @M_V's post correctly then it's likely nothing wrong with the fork, and I just need a shorter stem (or cut down the one I currently have). Definitely prefer that idea to needing to ream it or buy a new fork!

    also why cant you use the original stem, are the new bars 31.8? If the old stem is 26.0 and your new bars 25.4 can just use a coke can shim

    The bars are 25.4 so I can use a shim, but it would set the bars too low as it's not a riser stem ("drop stem"? Dunno what the word is), and my partner prefers an upright position. But I'm considering whether its easiest/safest overall to keep the OG stem and look for bars with enough rise to compensate, if they exist.

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