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  • Yikes. A 23mm Conti 4000 actually touches the seat tube on my Joe Waugh frame.

    Any ideas for a 20mm tyre? I’d wanted to put gumwalls on this but now looks unlikely.


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  • A 23mm Conti 4000 actually touches the seat tube on my Joe Waugh frame.

    Is the wheel all the way in the back of the dropouts? If the frame has any, perhaps remove the wheel alignment screws in the dropouts.

  • Sure that's not a classic TT frame? Angles look pretty steep.

    You might get a bit more clearance with a 19mm internal rim.

  • Any ideas for a 20mm tyre?

    GP4000S2 comes in 20mm. If you want something cheaper, I've got some spare NOS 700x22 Vittoria Diamante Pro Radiale which come up slightly under nominal size.

  • Wider rim

  • I’ve got some very skinny gumwalls you can have for free.

  • Any ideas for a 20mm tyre? I’d wanted to put gumwalls on this but now looks unlikely.

    Veloflex Master 22 for tanwall + minimal clearances? Available from Acycles. Not exactly the world's most sturdy tyre, but it'd look good.

  • They size up big, buy different tyres.

    Clement Strada 120tpi size up true to size (that’s what I’ve has to use on my road bike) also panaracers tend to come up true to size.

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