Puncture on C4S - Tyre Wear issue
Discussion
My 991 C4S has done 3,800 miles and picked up a puncture on the front offside wheel as a result of one of those pesky cable clips. The tread depth of the existing punctured tyre is 6.7mm inside, 7.2mm centre, 7.4 mm outside.
Am I OK fitting a brand new (presumably 8mm) tyre to the front offside assuming the front nearside has similar wear to the punctured tyre. My concern is not to cause any damage to the 4WD and differential.
Alternatively, would the puncture be repairable (see below) given the location on the tyre or will it be too close to the shoulder. At least a repaired tyre wont cause problems with differential wear.
So my options appear to be:
A) 1 new tyre
B) 2 new tyres
c) repair existing tyre
I am happy to take any option but I don't want to spend £500 if £250 will do, or £250 if £25 will do.
Thoughts?
Am I OK fitting a brand new (presumably 8mm) tyre to the front offside assuming the front nearside has similar wear to the punctured tyre. My concern is not to cause any damage to the 4WD and differential.
Alternatively, would the puncture be repairable (see below) given the location on the tyre or will it be too close to the shoulder. At least a repaired tyre wont cause problems with differential wear.
So my options appear to be:
A) 1 new tyre
B) 2 new tyres
c) repair existing tyre
I am happy to take any option but I don't want to spend £500 if £250 will do, or £250 if £25 will do.
Thoughts?
Matt Seabrook said:
Thejimreaper said:
Definitely repairable as its in the centre section of the tyre.
Am I looking at the same photo as you? It looks like the cable clip is in the left hand side/shoulder. I've seen punctures that close to the sidewall repaired which worked fine (fully vulcanised repair) but I don't know if it's within the BS.
thegoose said:
Matt Seabrook said:
Thejimreaper said:
Definitely repairable as its in the centre section of the tyre.
Am I looking at the same photo as you? It looks like the cable clip is in the left hand side/shoulder. I've seen punctures that close to the sidewall repaired which worked fine (fully vulcanised repair) but I don't know if it's within the BS.
I'd take it to a decent tyre specialist and get their advice.
To me it 'looks' far enough from the side wall to be repairable, the worst that could happen with a small hole in that area, would be a slow puncture again if it didn't work I'd have thought.
I am assuming mostly legal road use though.
To me it 'looks' far enough from the side wall to be repairable, the worst that could happen with a small hole in that area, would be a slow puncture again if it didn't work I'd have thought.
I am assuming mostly legal road use though.
I would be tempted to repair it!
But wait for the various - 'you have a 991 but are worried about £250/500' posts that non forum people may post....
I have repaired a few mainly due to wear issues and I was not simply prepared to chuck a perfectly good nearly new tyre.
Sometimes we are all a little too precious
But wait for the various - 'you have a 991 but are worried about £250/500' posts that non forum people may post....
I have repaired a few mainly due to wear issues and I was not simply prepared to chuck a perfectly good nearly new tyre.
Sometimes we are all a little too precious
Decision made. I am going to order a new tyre and when they take the old one off I will assess if it is repairable. If it is then I will put it back on and keep the new tyre for future use or If it is not repairable then I will just put one new tyre on. In addition to the detail I provided above, I realise that I drove on the flat tyre for a total of say 1/4 mile at 20mph and that may have knackered the side wall.
London GT3 said:
Decision made. I am going to order a new tyre and when they take the old one off I will assess if it is repairable. If it is then I will put it back on and keep the new tyre for future use or If it is not repairable then I will just put one new tyre on. In addition to the detail I provided above, I realise that I drove on the flat tyre for a total of say 1/4 mile at 20mph and that may have knackered the side wall.
Sorry, but I think your logic is slightly flawed, for a reason that you may not have considered. If it turns out it can be repaired you will then have a new one-off tyre, which will be a different age to any that you may fit with it in future. I appreciate you may have to do this now if the puncture's not repairable but if it is I'd not buy the new one - wait until you need a pair and buy them matched.thegoose said:
Sorry, but I think your logic is slightly flawed, for a reason that you may not have considered. If it turns out it can be repaired you will then have a new one-off tyre, which will be a different age to any that you may fit with it in future. I appreciate you may have to do this now if the puncture's not repairable but if it is I'd not buy the new one - wait until you need a pair and buy them matched.
You make a very good point. I suppose in my mind I am 80% certain that I will just put the new tyre on and maybe keep the repaired tyre as a "just in case I ever need it" type spare eventually taking it down the tip when it has kicked around the garage for a year or two! I am concerned about any hidden damage to the side wall and on the basis that no one seems to think I will damage the 4WD by replacing just one tyre then this looks like the preferred route.BS AU 159 specifies the repairable area as the central 70% of the tread. That puncture doesn't look like it's repairable under the standard.
http://www.btmauk.com/data/files/Minor_repairs_to_...
Stick a new tyre on, ~1mm difference side to side is not a problem.
http://www.btmauk.com/data/files/Minor_repairs_to_...
Stick a new tyre on, ~1mm difference side to side is not a problem.
It's difficult to say from you photo it looks a little touch and go to me. British standards are what it needs to be repaired to for it to be safe. So the best thing is to take it to a tyre retailer that you trust and ask for an opinion. Tyres over 200 section can have the centre 70% repaired so that leaves 15% each side and unfortunately yours looks to be beyond that. We use a transparent template put over the tyre to check anything that looks that close.
Previous posters are being very selective in showing information relating only to minor repairs which require a rubber only repair.
A major, or reinforced repair, is certainly possible in that area but not above V speed rating so your tyre is ruled out. That's assuming that it is outside of the central 70%.
A major, or reinforced repair, is certainly possible in that area but not above V speed rating so your tyre is ruled out. That's assuming that it is outside of the central 70%.
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