Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie

What size tyre?

Options
  • 13-01-2015 3:09pm
    #1
    mathie
    Registered Users Posts: 5,093 ✭✭✭


    Hi
    My wheel says "18-622 for rims 622 x 15 - 18c/15c"

    Does that mean that I can only use 700×18C tyres?

    thanks
    m


Comments

  • Options
    #2
    quozl
    Registered Users Posts: 3,308 ✭✭✭quozl


    The 15mm is probably the internal rim diameter, so you can use something between about 23 and 32mm - http://sheldonbrown.com/tire-sizing.html#width

    Rims can support a range of tyres width depending on their internal width. There's no way you can only use 18mm width tyres. If your rim is really a 18mm internal width - that text on your wheel is really confusing! - then a tyre of 25mm+ would be needed.

    Would you not have an old tyre that came off it to check?


  • Options
    #3
    cdaly_
    Registered Users Posts: 6,440 ✭✭✭cdaly_


    I'm assuming that this is printed on the rimtape covering the spokes. The actual rim width may be printed elsewhere on the rim and will just say something like '18-622' and nothing more. You can fit tyres up to around 28mm on a 15mm rim and from around 25-40 on a 18mm rim.


  • Options
    #4
    mathie
    Registered Users Posts: 5,093 ✭✭✭mathie


    Thanks for that

    So if I get a 25c tyre what tubes do I need?
    18 - 25c?
    18 - 28c?
    Does it matter at all or does the 25 just have to be between the lower and higher value of the tube?


  • Options
    #5
    quozl
    Registered Users Posts: 3,308 ✭✭✭quozl


    Doesn't matter as long as the 25 is in the range covered. That said, I'd try to have it be at the higher end of the range covered as that'll be a smaller and lighter tube assuming the same models. So I'd prefer 23-28 to 25-32, for example.


Advertisement