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Tyre tread depth

2K views 20 replies 8 participants last post by  axolotl 
#1 ·
Hi all,

I have a 2013 GT-R with Michelin Pilot Super Sport tyres all round. I have a slow puncture in one of the rear tyres. Ideally I just want to replace the one tyre (to cut the cost!), but would like to get some opinions on whether I should replace both the rear ones (or even all 4 of them). I guess the tread depth on all the tyres is the key factor here.

I've been discussing it with user Juice on another thread (- thanks again Juice, for the useful info). Eventually I'll get Pilot Sport 4S fitted all round, but the 3 good tyres still have plenty of life left in them.

The tread depth is 5mm on the rear tyres and 6mm on the front.
I think the brand new tread depth of a replacement tyre is about 7-8mm.

I'm aware that it could cause problems with the differential if there's too big a difference in tread depth.

Has anyone had a similar issue?
Or had any big problems by having different tread depths?
Wondering if there's a rule of thumb for the maximum difference you'd allow between tyres (e.g. 1-2mm)?

Any help would be much appreciated.

Cheers
 
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#5 ·
I drove the car out of the garage where I keep it (only for about 50 metres, at 10mph) before I spotted the warning light. One firm I spoke to said because I drove on the flat tyre, the inside might be damaged, and could blow out at high speed. Therefore should replace rather than repair. (I later found a big nail stuck in it... I inflated it and was still on 25psi, 24 hours later.) I dunno, I'm no expert with tyres but I thought they could inspect it and let me know if it's ok to repair. What do you reckon?
 
#7 ·
where abouts in the tread is the nail - too close to the side any most places won't repair. I have had at least two repaird, don't listen to the doom mongers who insist you should be buying 4 new replacements!

and yeah I have had a LOT of punctures!!
 
#11 ·
As long as it is over an inch from the shoulder of the tyre it should be repairable.
I can't see a tyre being damaged in 50m, they should be able to tell when they take it off if there is any damage, the inside of the tyre wall will have started to break down and be loose bits of rubber inside the tyre.

Another Option would be have a a look for apart worn (same make/model tyre) with similar tread left to what u have.
 
#12 ·
As long as it is over an inch from the shoulder of the tyre it should be repairable.
I can't see a tyre being damaged in 50m, they should be able to tell when they take it off if there is any damage, the inside of the tyre wall will have started to break down and be loose bits of rubber inside the tyre.

Another Option would be have a a look for apart worn (same make/model tyre) with similar tread left to what u have.
Cheers, I'll get them to inspect it first.

Where would you look for a used tyre? Just Ebay or do you know of any specialist sites?
 
#21 ·
I've had my April '09 R35 from new. Back in 2011 while on the autobahn I suddenly had the low pressure warning and the car was reading zero pressure on one of the original dunlop runflats. It turned out that this was a known issue that had not yet been admitted by nissan that the early valves were subject to corrosion and at 100mph the valve had imploded into the tyre. The runflats worked well as the car felt fine to drive. Eventually nissan accepted it to be a warranty issue and they paid for two new dunlop runflats to be fitted and got the car in to replace all the valves. They also paid for petrol and hotel expenses as my friends and I had to go to Dresden to the very far but nearest HPC to collect the replacement tyres. The best part is that at the time it was over £500 per tyre and I had been due to replace the pair of tyres at my own expense when I got back to the UK.
 
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