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Puncture-proof Tyres

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    #92
    Seaswimmer
    Registered Users Posts: 1,988 ✭✭✭Seaswimmer


    magicbastarder wrote: »
    what function do the pins perform?

    They go through the tyre and hold it in place on the rim. There are holes every few cms for a pin. Each end of the pin sits under the "overhang" on the rim.


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    #93
    pickarooney
    Moderators, Arts Moderators Posts: 35,472 Mod ✭✭✭✭pickarooney


    I've found someone selling a pair of Mavic cxp33 622x15c which would suit my needs. They originally and with a 9 speed set of cogs. Would a 7 speed set likely fit and is it difficult to switch them over?


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    #94
    Wishbone Ash
    Registered Users Posts: 24,995 ✭✭✭✭Wishbone Ash


    Alek wrote: »
    I have a dental caliper to measure rim wall thickness. All of my wheels had rims walls between 1.5 and 1.7mm when new, afair...
    Apologies for going off topic but what would a worn rim measure at Alek?

    (I have 'retired' several sets of wheels that were otherwise working perfectly but have what I think are well worn rims. Problem is I don't really know if I'm being over-cautious.)


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    #95
    PressTheButton
    Registered Users Posts: 312 ✭✭PressTheButton


    'These airless bike tyres could put an end to punctures':

    http://www.telegraph.co.uk/technology/2017/04/21/airless-bike-tyres-could-put-end-punctures/


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    #96
    Alek
    Registered Users Posts: 4,520 ✭✭✭Alek


    Wishbone Ash wrote: »
    Apologies for going off topic but what would a worn rim measure at Alek?
    It's something I've picked up from an article by Chris Juden in CTC's Cycle magazine, but I can't find an an online reference, & couldn't in in 2010. [...]

    Chris concluded that failure occurred typically with a rim thickness of 0.7mm & advised that it would be unwise to ride with a thickness less than 1.0 mm.

    https://yacf.co.uk/forum/index.php?topic=72871.0

    Also, worth checking 2 posts with pictures at the bottom of page 2.


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