Kwik-fit and a puncture.
in [Car Maintenance]
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From: moray on 22 Nov 2009 15:35 "Tim" <timdownie2003(a)obvious.yahoo.co.uk> wrote in message news:7lvpsoF3f9vmcU1(a)mid.individual.net... > Chris Whelan wrote: >> On Tue, 10 Nov 2009 16:46:52 +0000, Dave Plowman (News) wrote: >> >>> Mate had a puncture - a screw in the tyre of his new Audi A3. It's >>> done less than 1000 miles. Asked for some help since he's got a >>> problem in one hand. >>> >>> Went round and took off the wheel - it's got a space saver spare so >>> decided to get it fixed there and then so just left it jacked up. The >>> screw was in the outer main groove of the tread - quite a way in from >>> the edge so thought it would be repairable. >>> >>> Took it to Kwik-Fit - they are the nearest tyre place. Bloke got >>> out a special ruler and then a some sort of round template and >>> pronounced the tyre scrap. Quoted 160 quid for a new one... >>> >>> Went to a specialist place I'd used for tracking - they have a four >>> wheel >>> computer alignment setup - and they fixed it for 7.50. >>> >>> What is the formula for how close to the edge of the tread it can be? >>> And is it somewhat of a guess? >> >> No, it's covered by BS AU 159f. >> >> This may help: >> >> http://www.etyres.co.uk/etyres-press-media/repairable-area-gauge.htm > > The table shown seems to contradict the written text. > > "The repairable area is defined as a percentage of the tyre's "nominal" > section width and thus varies by the size of the tyre. " > > If you calculate the percentages from the given table (I was bored) you > find that they vary from 60% on narrower section tyres to 70% on the wider > ones. Clearly then it's not "a" percentage, it's a range of percentages. > > Of course it may be that the word "nominal" is what makes the difference > but I'm not sure how this is defined (other than by the obvious sidewall > markings). > > Tim Nominal just means the size that's written on the sidewall. Most tyres the actual width of tread, is wider than the stated width.
From: moray on 22 Nov 2009 15:43 "Dave Plowman (News)" <dave(a)davenoise.co.uk> wrote in message news:50b84011d3dave(a)davenoise.co.uk... > In article <yYgKm.61488$ep1.31527(a)newsfe30.ams2>, > Chris Whelan <cawhelan(a)prejudicentlworld.com> wrote: >> > What is the formula for how close to the edge of the tread it can be? >> > And is it somewhat of a guess? > >> No, it's covered by BS AU 159f. > >> This may help: > >> http://www.etyres.co.uk/etyres-press-media/repairable-area-gauge.htm > > Right. That ruler was what the KF guy used first - then added a red > circular thingie. Which had no markings. I think I can guess what the red circular thingie was. Was it about 25-35mm diameter? In that case it was the end of a puncture repair plug. I'd hazard a guess that they were trying to claim that the entire repair must fall within the repair ruler markings, and were using the end of a repair plug to show that the patch would be outwith the repairable area. Whereas, the only thing that has to be within the repairable area, is the drill used to make the hole to get the repair plug through. Provided the stalk of the plug is well within the tread reinforcing belt, then the patch can overlap the sidewall as much as it wants.
From: Dave Plowman (News) on 22 Nov 2009 18:50
In article <kohOm.63249$Xf2.37221(a)newsfe12.iad>, moray <spam(a)spam.com> wrote: > >> This may help: > > > >> http://www.etyres.co.uk/etyres-press-media/repairable-area-gauge.htm > > > > Right. That ruler was what the KF guy used first - then added a red > > circular thingie. Which had no markings. > I think I can guess what the red circular thingie was. > Was it about 25-35mm diameter? Yes. > In that case it was the end of a puncture repair plug. Ah. It didn't look like anything specially made to measure with. Home made, if anything. > I'd hazard a guess that they were trying to claim that the entire repair > must fall within the repair ruler markings, and were using the end of a > repair plug to show that the patch would be outwith the repairable area. Right. I actually downloaded the rule given in the above URL. Printed it out and checked the tyre. Easy since the screw was in one of the main grooves. And it was well within the repair area - by about 10mm. > Whereas, the only thing that has to be within the repairable area, is > the drill used to make the hole to get the repair plug through. > Provided the stalk of the plug is well within the tread reinforcing > belt, then the patch can overlap the sidewall as much as it wants. Thanks for the info. I'm disappointed with Kwik-Fit because my experience of this local branch has always been good. Despite the horror stories you read. -- *Did you ever notice when you blow in a dog's face he gets mad at you? * Dave Plowman dave(a)davenoise.co.uk London SW To e-mail, change noise into sound. |