Member Since: 12 Mar 2013
Location: London
Posts: 120
One irreparable tyre - do I need to replace all 4?
Rear tyre suffered a puncture yesterday. Unfortunately it's right at the edge.
Quick question to the learned panel:
The tyres currently on the car are
PIRELLI 255/55 R19 SCP VERDE 111V
with approx 20K miles on them. Can I replace just the two rear tyres with new Pirelli Verde, or is that a bad idea? If I should replace all four tyres I have been looking at the Michelin crossclimate for no other reason than they might be a better all-around tyre? Any views on these currently? Most of my driving is on road - with about 5% off-road.
Any thoughts much appreciated.
R.
30th Nov 2019 3:46 pm
adam
Member Since: 20 Sep 2005
Location: Home and Happy
Posts: 6917
Go to a decent independent tyre dealer - preferably one that also works on truck tyres - and ask for a quote for a vulcanised repair if the tyre still has enough tread. Shouldn’t pay more than £30 - £35 and takes about 3 days.
Before all the naysayers pipe up about safety, it’s 100% safe if you go on the recommendations of a reputable fitter.Now Golf GTI PP, 7 speed DSG.
Ex D3 and D4
30th Nov 2019 4:47 pm
riverblanche
Member Since: 31 Aug 2010
Location: retford'ish
Posts: 2226
Hi,
whats on your spare wheel
have just had a puncture inside edge so replaced it (forgot about "Major repairs") spare was also brand new, so now has 2 new tyres on the rear (one bought one was spare) and spare now has 5mm, as do the fronts.
All are same Pirelli's
Would try to match thread depths on same axle but would not replace all 4
so also what are threads depths 20k miles depends how you drive ours has 30k and still 5mm.
Member Since: 12 Mar 2013
Location: London
Posts: 120
adam wrote:
Go to a decent independent tyre dealer - preferably one that also works on truck tyres - and ask for a quote for a vulcanised repair if the tyre still has enough tread. Shouldn’t pay more than £30 - £35 and takes about 3 days.
Before all the naysayers pipe up about safety, it’s 100% safe if you go on the recommendations of a reputable fitter.
yep, already tried that earlier today, but it's right on the "corner" so there is actually a slight bulge and the guys said that although it was repaired it probably wasn't a good idea to use it except as a spare.
30th Nov 2019 7:29 pm
Rich_S
Member Since: 12 Mar 2013
Location: London
Posts: 120
riverblanche wrote:
Hi,
whats on your spare wheel
sadly it's not a Pirelli, but the original from new (can't remember off the top of my head what it is)
I currently have 5mm of tread on the Pirellis so perhaps the compromise it to get two new rear tyres so that they at least match (the other rear has also had a puncture repair last year) each other. They just won't match the tread on the fronts. If I were to do that, would it be a bad idea to change to a different tyre set altogether for the rears? Just asking!
thanks.
30th Nov 2019 7:42 pm
M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8225
20k miles = how much tread depth left? - mileage is irrelevant it what tread depth is left, I would be looking at a new pair fitted to the front and keep the “good” as a spare.
I’ve got some “spare” tyres with about 4mm left on them £30 each if that’s any help.
Edit: I must learn to type faster.
So the spare tyre is 6 years old?- It’s time it was used, buy another to match it It can when others can't,
It will when others won't,
It goes where others don't.
30th Nov 2019 7:49 pm
leeds
Member Since: 30 Aug 2010
Location: West Yorkshire
Posts: 4314
Whilst tread depth and wear is important when deciding when to replace tyres there is another very important factor the AGE of the tyre.
As tyres get older the rubber degrades for many different reasons from oxidisation, thermal, salt, UV etc.
As tyres age they start showing signs of ageing be it cracking between tread blocks or circumferential cracking on the side walls.
As tyres get old, rubber hardens and they are more susceptible to punctures.
Week and year of manufacture of tyres are marked on the sidewalls.
Once tyres become 6-7 years old they are getting to the end of their useable safe working life and retirement should be considered.
30th Nov 2019 10:59 pm
Rich_S
Member Since: 12 Mar 2013
Location: London
Posts: 120
so what I am hearing here is that the spare is now getting to the end of its useful life, so....
I should get two new tyres
Fit both to the front,
move the front to the back
take the remaining usable tyre that is on the back (right) and use that as my "new" spare....as it's younger....
does that sound about right!
1st Dec 2019 12:00 am
garrycol
Member Since: 06 Dec 2010
Location: Canberra
Posts: 1130
Just replace the damaged tyre with the same make and size. If the new one is the same as the old tyre the difference in tread thickness will not make a scrape of difference. Not enough to cause any issues witn the car's systems or drivetrain.
Try not to over think these things.
Garry
1st Dec 2019 12:58 am
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 73080
+1. ^^^
1st Dec 2019 1:03 am
pagoda
Member Since: 13 Aug 2009
Location: Not London Anymore (or the US for that matter)
Posts: 1929
+1
Don't repair if the advice is not to. Take a look at the others. Maybe a rotation will produce a tyre that is worse off than the others. That way at least you can replace two at once. If you replace one you'll be forever chasing your tail.PAGODA
1st Dec 2019 1:18 am
LT
Member Since: 31 Dec 2005
Location: South West
Posts: 23824
Just remember if you’re only replacing one or two, always fit new tyres on the rear axle. Regardless of what drive system the vehicle is. 👍2006 D3 HSE (Original & still the best)-GONE
2010 D4 HSE (A bit bling)-GONE
2014 D4 HSE (Almost too bling)-GONE
2015 D4 HSE (A heated what?)-GONE
2016 D4 Landmark (Written Off)-GONE
2016 D4 Landmark (Surely the last!) PD1881 rims-GONE
2017 FFRR SDV8 Autobiography (now semi-retired)
1st Dec 2019 1:23 am
PCT3
Member Since: 13 May 2017
Location: Kent
Posts: 144
It’s the rolling circumference on these type of 4x4s that should be the deciding factor, front and rear diffs are simple open diffs but the centre ‘diff’ is no longer a diff it’s a clutch which looks at the different axle speeds.
Prior to changing all 4 tyres (big miss match of manufacture and wear) certain high speed bends could cause the centre diff to start engaging as it saw different axle speeds.
BMW I believe allow 10% differential as the max in tyre wear, as it can damage the Transfer box, Land Rover use the same styner transfer box although LRs have the low ratio addedDiscovery 3 HSE 07
Discovery 1, Search & Rescue SE4x4 Responce
Fiat Decato motor home
Mazda MX5
1st Dec 2019 8:28 am
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 73080
My D3 lasted 166k miles on all sorts of mismatched tread depths, though usually the same tyre type, and it never had any issues with diff wear or centre diff thingie. In addition to the abuse she got on assorted off-roading jollies throughout her life. There are bigger and more expensive things to worry about.
1st Dec 2019 8:38 am
KrisC
Member Since: 19 Jan 2018
Location: Ayrshire
Posts: 85
LT wrote:
Just remember if you’re only replacing one or two, always fit new tyres on the rear axle. Regardless of what drive system the vehicle is. 👍
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