Mixing RFT with non RFT Tyres
Discussion
Just wondering - how much of an issue is it running runflats on the rear and go-flats on the front? My PS2 ZP fronts are pretty much knackered, but my rears still have 4 or 5mm of tread left. I figure they'll need replacing in about 6 months but I can't wait that long to do the fronts (but equally can't justify replacing all four right now and wasting the Michelins). I want to get shod of the runflats and just replace with something decent. Any thoughts or experiences with this issue?
Podie said:
Not a good plan - it'll handle like a turd.
Generally speaking does the ride become less sporting once you move to non RFTs? My understanding is the sidewalls on RFT are very thick which is why they are so crashy. But I do still like a firm ride. Does the ride become noticeably softer with non RFTs?Rdawson said:
Podie said:
Not a good plan - it'll handle like a turd.
Generally speaking does the ride become less sporting once you move to non RFTs? My understanding is the sidewalls on RFT are very thick which is why they are so crashy. But I do still like a firm ride. Does the ride become noticeably softer with non RFTs?My comment was about mixing them.
smashy said:
Ive got non run flat on my F30 30d michelin PS3 finally feels like ive got rubber between me and the ground a lot nicer than the so called 3rd generation and I reckon I can throw it about better as well.
Is there any special procedure for shifting to non runflats in terms of the tyre pressure sensors? Am I likely to throw a code or anything like that if non runflats are installed?No problems ......as for me I got this put in all my tyres as well,met the guy and he put it in £70
http://www.ultrasealgb.co.uk/site/
http://www.ultrasealgb.co.uk/site/
For about 5k I had RFTs on the rear and GoFlats on the front, was a bit tail happy if you provoked it, but driving knowing this it was fine.
I found the RFT was a better drive, car feels a bit loose and wallowy now, I run them a bit higher PSI but it's not cured it completely. Still the comfort is much improved, economy is up, road noise down etc.
I found the RFT was a better drive, car feels a bit loose and wallowy now, I run them a bit higher PSI but it's not cured it completely. Still the comfort is much improved, economy is up, road noise down etc.
Digitalize said:
For about 5k I had RFTs on the rear and GoFlats on the front, was a bit tail happy if you provoked it, but driving knowing this it was fine.
I found the RFT was a better drive, car feels a bit loose and wallowy now, I run them a bit higher PSI but it's not cured it completely. Still the comfort is much improved, economy is up, road noise down etc.
Loose and wallowy is what I thought when I changed RFTs for non on a 3 series I had, whatever I did with pressures. Also pitched quite badly under heavy braking. Yes, it rode more softly but overall it wasn't much better.I found the RFT was a better drive, car feels a bit loose and wallowy now, I run them a bit higher PSI but it's not cured it completely. Still the comfort is much improved, economy is up, road noise down etc.
In all honesty, I find the ride on my 530 perfectly fine with RFTs and wouldn't think of changing them these days.
The best normal tyre is better than the best rft in general terms of grip etc. which is why most if not all performance cars come with normal tyres. There are normal tyres with firmer sidewalls but the characteristics will always be different. I find the better grip outweighs any handling change, and personally I think they handle better anyway, irrespective of ride. Normal tyres are also typically cheaper, you can't go far wrong with Michelin pilot super sports or Pirelli asymmetric 2 tyres.
As for mixing, many people will say don't as it will throw things out - my take is changing the rears say from warn out to new rubber of the same tyre make/brand will have a pretty big impact anyway so what's the difference? I believe 4 wheel drive cars like the x3 can be temperamental though to mixing tyres.
As for mixing, many people will say don't as it will throw things out - my take is changing the rears say from warn out to new rubber of the same tyre make/brand will have a pretty big impact anyway so what's the difference? I believe 4 wheel drive cars like the x3 can be temperamental though to mixing tyres.
gizlaroc said:
Try it.
You may be fine, it will be very obvious if it is not this time of year, the traction will come on a lot and you will feel very twitchy at the back, but you may be fine.
I think I might. It's (supposedly) summertime here in NZ, so there won't be any issues with ice or snow! You may be fine, it will be very obvious if it is not this time of year, the traction will come on a lot and you will feel very twitchy at the back, but you may be fine.
I have had mixed tyres front and rear on a few occasions, while waiting for stock to arrive, and it has ruined the car. I was gobsmacked at the difference.
However, while waiting for PS2s to arrive for the fronts of the 18" wheels I had bought for tracking the M3, which came with Kumho KU31s, it was fine, felt very planted.
So you never really know, could be fine, could feel like the springs are snapped at the back, best way to describe it.
However, while waiting for PS2s to arrive for the fronts of the 18" wheels I had bought for tracking the M3, which came with Kumho KU31s, it was fine, felt very planted.
So you never really know, could be fine, could feel like the springs are snapped at the back, best way to describe it.
Edited by gizlaroc on Monday 15th December 22:08
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