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Author Topic: tyres  (Read 181 times)

Offline hommerj124

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tyres
« on: June 20, 2020, 02:59:31 pm »
hi due to no spare wheel fitted or available has anyone considered run flat tyres, if not why not.

ta

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    Offline ArdsAbarthist

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    Re: tyres
    « Reply #1 on: June 30, 2020, 08:34:20 am »
    I must admit that I hadn’t given run flats much consideration until you raised the point. BMWs had a reputation for a hard ride when thus shod, which had rather put me off their use. However I read recently that Bridgestone have refined their run flats so that the side wall is a bit more compliant, offering a more comfortable ride when fully inflated.l see that they offer them as a performance tyre as well, so if they can be supplied in the right size then it’s something I would certainly consider. Although it would be nice to have the thoughts of someone who had already tried them on their Spider as I’m not generally an enthusiastic early adopter of new technology. I wonder if the standard wheel rim will be adequate to retain the bead when deflated?

    Offline GTMartin

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    Re: tyres
    « Reply #2 on: July 02, 2020, 11:20:57 am »
    I saw this post a few days ago an wondered if it would be possible. As ArdsAbarthist I also thought about tyre retention, I seem to remember they lock into a different profile in the rim.

    I did a bit of digging and found the following.

    Fitting Run Flat to an older vehicle ('retro fitting')

    If you are considering changing to run flat tyres on a vehicle that was previously fitted with 'normal' tyres, then there are several points to consider:
    1.Tyre Pressure Monitoring System
    Run Flat TPMS Run flats must only be installed on a car which has TPMS/tyre pressure monitoring system. TPMS alerts the driver to a puncture so they are aware that they have a limited time to replace their tyre, and so they drive within the limits of their deflated tyre
    2.Vehicle Suspension
    You should also note that you may need some changes made to your vehicle's suspension. Because of their stiffer construction, run flat tyres contribute to a vehicle's suspension when fitted as original equipment.


    I think it would be an expensive mistake if you fitted them and they did not work with your suspension set up. Also if you did get a puncture you would have to scrap the tyre as they are not repairable.