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Tyres not sitting right

  • 22-01-2009 9:56pm
    #1
    cunnins4
    Closed Accounts Posts: 882 ✭✭✭


    Right, got new mtb wheels during the week, but my feckin tyres won't sit on them properly. There's a low spot on each tyre. They seem to be stuck on the rim tape at these points. I've tried to even out the rim tape so it's dead centre but no joy. I tried putting washing up liquid to allow the tyres to slip out and sit right but nothing. Tried over inflating them too to force it out onto the rim too.

    I've only cycled 25k on them so far so maybe they'll pop out with time, but if anyone has any suggestions I'm all ears.

    They're 26" wheels, 26" tyres of course. I was using the tyres on my old wheels, and they were fine. The tyres themselves only have a few hundred km on them, maybe 1000 at most.

    Cheers.


Comments

  • #2
    uberwolf
    Registered Users, Registered Users 2 Posts: 7,581 ✭✭✭uberwolf


    well first thing is wash out the washing up liquid - it will corrode.

    At a low pressure, shift the tyre over and back a few times, focusing over the trouble spot.

    Is there any prospect you've got the tube trapped (pinched)?


  • #3
    victorcarrera
    Registered Users, Registered Users 2 Posts: 1,059 ✭✭✭victorcarrera


    I have found that for every low spot there is usually a high spot. So try inflating at 10psi intervals and pressing in the high spot to allow the low to seat properly. Most tyres have beading which you should use as a guide to seat the tyre accurately. I had difficulties like this with cheaper tyres and buckled wheels that I couldnt fix and found that the tyre wear was accelerated at the high and low spots. Do you have a buckle? I have used the washing up liquid on aluminium and steel bicycle and motorcycle spoked wheels with no probs but wash the rims and tyre before riding. Check also that you havent a kink or break in the tyre's clinch wires. This might have happened when you swapped them over.


  • #4
    cunnins4
    Closed Accounts Posts: 882 ✭✭✭cunnins4


    uberwolf wrote: »
    well first thing is wash out the washing up liquid - it will corrode.

    At a low pressure, shift the tyre over and back a few times, focusing over the trouble spot.

    Is there any prospect you've got the tube trapped (pinched)?

    sh1t, got that washing up liquid idea from a mtb forum when I googled it. Thanks for the heads up.

    The tube's fine and I've tried it at loads of different pressures. I've even tried pulling up on the trouble spot as I pump it up.


  • #5
    cunnins4
    Closed Accounts Posts: 882 ✭✭✭cunnins4


    victorcarrera wrote: »
    I have found that for every low spot there is usually a high spot. So try inflating at 10psi intervals and pressing in the high spot to allow the low to seat properly. Most tyres have beading which you should use as a guide to seat the tyre accurately. I had difficulties like this with cheaper tyres and buckled wheels that I couldnt fix and found that the tyre wear was accelerated at the high and low spots. Do you have a buckle? I have used the washing up liquid on aluminium and steel bicycle and motorcycle spoked wheels with no probs but wash the rims and tyre before riding. Check also that you havent a kink or break in the tyre's clinch wires. This might have happened when you swapped them over.

    Wheels're brand new out of the box, and as straight as can be.

    Tyre wires are fine too-checked them. Tyres are Schwalbe Marathon slicks. Pretty middle of the road, not cheap or expensive. They really seem fine. I've only had one puncture on them since I got them so the tyre's only been taken off twice on the front and once on the rear. The low spot's on both tyres!

    TBH it seems the rim tape is the troublesome thing because if I move the tyre around the problem persists with whatever piece of tyre's over that part, but I can't seem to sort it out.

    Was gonna put the old rim tape on the new wheels....seems like a bit of a waste of new stuff though....


  • #6
    victorcarrera
    Registered Users, Registered Users 2 Posts: 1,059 ✭✭✭victorcarrera


    Rim tape is available in different widths. Remember it only needs to cover the spoke holes. Is yours too wide. How does it compare to the old ones.


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  • #7
    cunnins4
    Closed Accounts Posts: 882 ✭✭✭cunnins4


    victorcarrera wrote: »
    Rim tape is available in different widths. Remember it only needs to cover the spoke holes. Is yours too wide. How does it compare to the old ones.

    Haven't compared it yet, will do tomorrow or saturday. the tape came with the tyres so I'd assume it's the correct width?

    I'll swap 'em over and see how it goes. If it works sure feck it, one they don't puncture and it's not bumping up and down every rotation I'll be sorted!

    Thanks for the input.


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