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Thread: Two screws in tyre

  1. #1
    Regular Member videodoctor's Avatar
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    Default Two screws in tyre

    I have just been to kwik-fit to have a screw removed from one of my rear tyres.The tyre has 6mm of tread left.The screw was bang in the centre of the wheel so i thought nice easy repair.When the tyre was removed it turned out that i had 2 screws stuck in it.The thing is i have already had one repair done to the tyre and the two new ones are all spaced approx 11 inches apart.According to kwik-fit ,they can put 3 repairs on a wheel but they have to be spaced further apart.

    Anyway they repaired it anyway but said that i really needed a new tyre.
    The tyres i've got on are Michelin Premacy's at...wait for it...£179!!(from kwik fit)
    I have just been on the net and the cheapest i can find for Michelin is £102.

    Does anyone know what the odds are of the 3 punctures causing catastophic failure.

    I don't remember ever replacing a tyre due to wear..its always nails and screws that get them.

    Are kwik fit right about spacing or were they trying to sell me a tyre?

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    My mate worked for Kwik fit years ago and he's plugged a tyre in the side wall before (his own car). He said he went on a training day and they where told not to repair a tyre with a hole in it within an inch and a half of the wall, but try and sell a new tyre. He plugged lots of tyres for me near the edge of the tyre, even in the corner once. Never had a failure or a problem. In answer to your question. THEY WHERE TRYING TO SELL YOU A TYRE

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    I would take professional advice on safety issues. If I was in danger of having a heart attack, I would not ask advice on a forum where you can get lay advice. Lay advice maybe correct enough but you never know.

  4. #4
    On a Sabbatical VauxVeteran's Avatar
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    I'm no pro, but in your case I'd say as long as they weren't next door to each other the chance of 1 of 3 failing is the same as one on it's own, regarding sidewalls and edges this is another matter, the wall is thinner so that really is a no no, on the edge the plug patch can't stick properly and takes all the forces when cornering, so again a no no, anything in the band of the tyre excluding the inside and outside treads should be ok, but anything that's less than an inch from the side of the tyre I would ditch.

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    Regular Member m8internet's Avatar
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    The Motor Vehicle Tyres (Safety) (Amendment) Regulations 2003

    The repair patches must NOT overlap
    However, you will note that many tyre fitters will carry out up to three repairs on tyres rated V and above...
    I myself have had V, W, Y, and Z rated tyres repaired, however I always fully inspect it before and after repair

    A tyre must not be repaired if it has any of the following :
    Damage larger than 6mm in tyres up to and including J speed rating
    Damage larger than 3mm in tyres above J speed rating up to and including V speed rating
    Damage not reasonably perpendicular to the casing
    A speed rating above V
    Ply separation or local removal of inner lining and/or ply cutting by penetrating object (secondary damage)
    Tread separation
    Broken bead wire or bead damage
    Damage due to under inflation in service
    Sidewall damage
    A penetration occurring outside an area of the tread, measured about the centreline, which is 50% of the nominal section width of the tyre

    The maximum number of repairs is not to exceed :
    2 repairs per tyre in tyres up to and including J speed rating
    Patches must not overlap
    1 repair per tyre in tyres above J speed rating up to and including V speed rating
    No repairs in tyres with speed ratings above V

  6. #6
    Regular Member barkzz's Avatar
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    Nails in the side wall, or the side wall, or the general out circumfrance are a massive no-no. those areas are under most stress during cornering, and take a lot of the load up, in what is a thinner area.

    It wouldnt take an awful lot for a blow out.

    I had this happen to me after picking a nail up into a sidewall driving to newcastle. (Hire car thankfully) I topped it back up to 32 PSI, and llimped 100 miles up the motorway as i needed to get there.

    When i wrang the AA, and they came out, the mechanice went nuts, when i told him id been doing 65-70 on it. Basically dicing with death

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    Regular Member m8internet's Avatar
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    Quote Originally Posted by barkzz View Post
    Nails in the side wall, or the side wall, or the general out circumfrance are a massive no-no. those areas are under most stress during cornering, and take a lot of the load up, in what is a thinner area
    Presumably you mean a thinner materal thickness
    I've had a nail in a sidewall before, it wasn't noticed on a MoT (at a VX dealership, no surprise there!)
    The main issue with nails in sidewalls is they tend to propogate buldges which also transfer across the tyre, resulting in two or more similar buldges
    As the buldge increases it thins the material even further, and eventually in most cases leads to catastrophic failure

    The last time I had a nail in the sidewall I stopped driving the car, it was recovered, but it took three days to get a replacement tyre!

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    Regular Member barkzz's Avatar
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    Quote Originally Posted by m8internet View Post
    Presumably you mean a thinner materal thickness
    I've had a nail in a sidewall before, it wasn't noticed on a MoT (at a VX dealership, no surprise there!)
    The main issue with nails in sidewalls is they tend to propogate buldges which also transfer across the tyre, resulting in two or more similar buldges
    As the buldge increases it thins the material even further, and eventually in most cases leads to catastrophic failure

    The last time I had a nail in the sidewall I stopped driving the car, it was recovered, but it took three days to get a replacement tyre!
    Exactly my point, but in a more succint fashion

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    Go for part worn tyres mate thats what i use u can still get good name tyres i got 2 new fronts £20 each and they were practically new and that was for 18inch wheels with low profiles

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