• Why would they be stuck so fast in the first place? CC website doesn't mention special tools for fitting/removal. I'm thinking ovalised HT maybe?

    Can you measure it? I have a couple of bikes with 110s and don't remember the bearings being that difficult to remove 🤔

    Is the bearing outer corroded?

  • Measure the headtube? I can and will, though the cups are installed so might not too be able to get a caliper on any rebate if there is one. Pretty sure it's 34mm nominally

    @coventry_eagle I know, which is kind of why I bought it, though I can't imagine that extends to cack handed spannering. I guess if the cups are out of tolerance that's a manufacturing fault!?

  • I'd measure the external bit of the cup where the bearing sits to see how round that is.

    The version I have looks a bit newer. The cups have an additional seal which does add some resistance compared to the 40 model.

About

Avatar for Polygon @Polygon started