Have I made a mistake with my tyre choice.

J

J14RK D

Member
 Worcestershire
I just bought my new z off a guy who agreed to do an mot first. The car needed two new back tyres but instead of putting any old thing on to get it through, he kindly phoned me and we agreed to fit two potenzas and buy one each. The thing is I had read somewhere that when given the chance it is best to switch to non runflats and so that's what I chose for the rears, but when driving the car I was really surprised with the comfort but not so impressed with the sag you get when flying into a corner. I had a very similar feeling when I changed my Fto rears for 40s from 35s so I know it's the tyres. I was wondering if anyone had any advice and if it could be resolved by swap g the fronts for non runflats? :oops:
 
a common complaint of those that have changed from Run flats is the subsequent loss of sharpness - most people say from the front though rather than the rear.

plenty on here have run RF on one axle and non-RF on the other without problems. not recommended but not illegal either.

Shoulda switched to Michelin runflat's (ZP) and gotten the best of both worlds :D

hope you can enjoy the drive soon :driving:
 
J14RK D said:
Wow, is that all you have for me.great help :thumbsdown:
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Christ, you're going to last long on here with an attitude like that. All mmm-five was offering (correct) advice...
 
Well it's nice to know I'm not alone. I'm quite fussy and to be honest it doesn't affect the handling, just the feel but I'm sure I'll get used to it. I wish I had gone for 30s instead of 35s which would have stiffened it up a bit more while maintaining some comfort.
 
J14RK D said:
Wow, is that all you have for me.great help :thumbsdown:
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What mmm-five said is what the majority of us on here would suggest. I've never know mmm-five to give anything but an honest answer and his knowledge is as good or better as anyone's on here.
 
a11y said:
J14RK D said:
Wow, is that all you have for me.great help :thumbsdown:
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Christ, you're going to last long on here with an attitude like that. All mmm-five was offering (correct) advice...
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I don't think I was being harsh... It's just that he was telling me what I already know and with no explanation or advice. Im not here to be patronised. I apologise if I caused an offence.
 
J14RK D said:
a11y said:
J14RK D said:
Wow, is that all you have for me.great help :thumbsdown:
Click to expand...
Christ, you're going to last long on here with an attitude like that. All mmm-five was offering (correct) advice...
Click to expand...
I don't think I was being harsh... It's just that he was telling me what I already know and with no explanation or advice. Im not here to be patronised. I apologise if I caused an offence.
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:thumbsup: :icb:
 
Agree that switching to non RFT necessarily means losing some stiffness in the sidewall, IMO this is a benefit in terms of suspension control as well as comfort, I got used to the change in feel within about five miles and wouldn't go back to RFTs unless I could afford to try the Michelin runflat's.
 
did the transition gradually as waiting for the fronts to wear down. Immediate improvement with non RF on rear and the different stiffness felt better to me
 
Ref the different tyres front and rear (as you have done it), it's not ideal and I wouldn't do it, but I know many have without incident - If I were you I'd swap the fronts to match and try and sell the tyres on - people do by them when their cars need to go back to BMW!

Ref the stiffness, I am still not entirely happy with the loss of sharpness from non-un flats. You'll notice it more when you change the fronts. However the ride is better and IMO the car feels safer and will corner faster - Gannet I am talking about the OEM tyre here :wink:

Few things that I found helped...
M wheels - wider offset made it feel a little better - not really an option though.
Fitting a strut brace helped a lot at the front end.
Fitting decent polly bushes - this helped a lot, I was amazed at the difference this made.
Oddly this last one... fitting an M steering wheel really helped with the feeling from the steering - probably not something you've noticed yet.

Your final option, put it down to experience and swap the back for run flats - there are people that are quite happy with the OEM tyres and like the harder feel of the car.

EDITED to remove emotive comments that could cause unproductive debate.
 
gannet said:
a common complaint of those that have changed from Run flats is the subsequent loss of sharpness - most people say from the front though rather than the rear.

plenty on here have run RF on one axle and non-RF on the other without problems. not recommended but not illegal either.

Shoulda switched to Michelin runflat's (ZP) and gotten the best of both worlds :D

hope you can enjoy the drive soon :driving:
Click to expand...

I totally agree with Gannet, Michelin runflats are the only runflats by choice.....would never change to anything else. (just my opinion)
 
Thanks for all the help and info guys. I think I'm going to buy some michelin run flats or just buy a set of CSL 19's. Depends how much I can get for my mv2's.
 
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