madisonmonkey

iTrader: (4)

Anyone know of any problems putting standard tyres on a cooper s that is currently on runflats?
I'm sick of the things and want some real grip

Thanks in advance, monkey.

RyanSTI

iTrader: (1)

there just tyres mate, no diffrence apart from better ride quality and grip without the runflats lol

dazdavies

iTrader: (22)

As Above, just change them. I had a 1 series M Sport BMW. Standard tyres were horrible run flat noisy buggers.

I just swapped them for normal tyres and everything quietened down and the car was alot more comfortable.

TheVoices

iTrader: (5)

I thought the rims for runflats were different ?

dazdavies

iTrader: (22)

Nope its a common misconception.
Its just the tyres that are different. They have harder shoulders that don't fold when the tyre has no air.

madisonmonkey

iTrader: (4)

Thanks people, that confirms what I thought.
Idiot in the tyre shop wont be getting any business from me then.....

TheVoices

iTrader: (5)

I'm pretty certain that rims designed for runflats have an extra groove for the tyre bead. I realise that the sidewalls are stiffer so you can run on 'flat' tyres, but I seem to remember the diagrams I have seen show a 'J' shaped groove that the shaped bead on the runflat tyres engages with to prevent them coming off the rim if driven hard with no air in them ?

I work for Jaguar and we had a proposed set of 19" alloys for the XK which would only have been available with runflat tyres. When Jag saw the feedback BMW were getting from runflat users (harsh ride and more road noise due to stiffer sidewalls) they dropped the wheel from the range. This leads me to believe that some rims are designed for runflats only ?

maydew

iTrader: (9)

friend of mine, put some run flats on his civic as they came cheap , once fitted they kept going down as the tyre would not seal on the standard rim ,so pretty sure there must be a extra lip for it to seal to the rim , plus there must be more than just a stiffer wall to stop the tyre popping over the rim when it did go down

dazdavies

iTrader: (22)

Then I must have been lucky on all of the four tyres I swapped.
I love this a friend of mine has told my mate and my mate told me crap.

I have actually swapped out four of my own run flat tyres for non run flat tyres on my own car without problems. This was on a 2005 BMW 120D M sport with 18inch Rims

maydew

iTrader: (9)

it was my sisters boyfriends civic mate and i sold him a set of tyres to replace and it gutted him to have to pay out again for tyres

dazdavies

iTrader: (22)

Look like you didn't fit them properly then

Chelspeed

Perhaps you're both right. Daz successfully fitted non run flat tyres to run flat rims and Maydews mate tried to fit run flat tyres to non run flat rims.

Perhaps run flat tyres need an extra groove inn the rim but can take non run flat tyres OK.

finchyboy

My Brother runs Toyo T1r's on his cooper S the difference is night and day in term's of ride quality steering feedback and road noise.

maydew

iTrader: (9)

put like that maybe your right lmao lmao

Jam Performance

iTrader: (3)

I run Toyo T1R's on the O.E. Cooper S 17's without any issues, the runflats are just awful and tramline badly on the motorway

riiidaa

iTrader: (2)

There are different run-flat technologies Run-flat tire - Wikipedia, the free encyclopedia

madisonmonkey

iTrader: (4)

4 x vredestien ultracs fitted with no problems at all.

I've only driven it for about five mins, but what a revelation