Mixing Run-flats with regular tyres

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portculisz4

Member
Owned my E85 2.5i now for about 2 months. Previous owner replaced rear run flat tyres with regular radials of the same size to pass MOT. Question is - is it OK to run with mixed tyre types ? I have run flats on the front and regular on the rear and I am concerned as to whether this would cause a handling issue, I assume it's not illegal as it met the MOT requirements. Would tyre pressure be the same for both types, if not, what would be the recommended pressures for front and rear.
 
Not answering your question directly, but if you still have the OEM-spec Bridgestone Potenzas on the front, get rid of them; then you’ll be able to drive in a straight line.

I don’t think I’ll be alone on here by saying you should always go for a decent set of matching tyres all round.
 
If it were me, the fact that I could tell the insurance company that I legally went backwards through the hedge would not quite cut it.
Ditch the runflats before they ditch you. :thumbsup:
 
While it may be legal I wouldn't want to go far with that mixture fitted.

As others have said I'd get a pair of decent non-runflats on the front.
 
Obviously not ideal, but I wouldn't say it's as suicidal as the previous replies seem to make it sound.

I bought my car a couple of months ago and it came with cheapo Jinyu (non RF) on the front and Continental Sport Contact 2 SSR (RF) on the rear. All are about 7 years old as well.

I've even had it up the Buttertubs Pass and The Struggle just a couple of weeks ago and I'm still here!

Plan is only to change when my wallet recovers enough to change the wheels at the same time. 17's on at the moment and I'll be going up to 18's
 
As others have said this is a question that’s been asked many times before, ideally you should have the same brand and type/style on each wheel, obviously what you really shouldn’t have is different brands/type/style or significantly different tread depths of an identical tyre on the same axle and what you have is somewhere in between. It’s not really any different than having Goodyear F1 A5’s on the front and Uniroyal Rain Sports on the rear.
 
IMO It’s the small %age when you have an extreme situation - when the motorway comes to a full dead emergency stop… some nob pulls out on you… it’s raining, you’re going somewhere new & take an unfamiliar bend that’s much sharper than expected.

U have proportionally 4 tiny patches of rubber holding +1 ton of car… having used many brands am surprised just how different they are, borne out by all the nay sayers above.

Yes they’ll go round & round, will different types save your bacon in an emergency or will you qualify for a Darwin Award, your call :thumbsup:
 
PeteyZ4 said:
Obviously not ideal, but I wouldn't say it's as suicidal as the previous replies seem to make it sound.

I bought my car a couple of months ago and it came with cheapo Jinyu (non RF) on the front and Continental Sport Contact 2 SSR (RF) on the rear. All are about 7 years old as well.

I've even had it up the Buttertubs Pass and The Struggle just a couple of weeks ago and I'm still here!

Plan is only to change when my wallet recovers enough to change the wheels at the same time. 17's on at the moment and I'll be going up to 18's
Click to expand...

My feelings too.
If both sets of tyres are from a quality manufacturer with similar grip ratings , you are unlikely to notice any difference, apart from a hard ride at the front.

I found the biggest effect is having a harder compound rubber on the back and a softer (grippier) compound on the front - This makes life very interesting going round a wet roundabout.
 
4x A5 sized patches of rubber are all that are between you and potential death... better to be a couple of hundred quid poorer.
 
Gentlemen, enough said,
I think you have all made the point very clear. RFTs out next week to be replaced by the same make model as the back
 
portculisz4 said:
Gentlemen, enough said,
I think you have all made the point very clear. RFTs out next week to be replaced by the same make model as the back
Click to expand...

Splendid..make it so :driving: :thumbsup:
 
portculisz4 said:
Gentlemen, enough said,
I think you have all made the point very clear. RFTs out next week to be replaced by the same make model as the back
Click to expand...

Get a Hunter Alignment check done on the car too if you've not had that already.
 
Sorry one last question I should have added. When replacing RFTs with regular tyres, will this affect the tyre low pressure warning system ??
 
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