BMW - Runflats
Discussion
boothy1987 said:
Can you put conventional tyres on a 5 series BMW (2007) that was originally on runflats?
And is there an issue with the fronts being standard tyres and the rears being runflats? I assume the ride and maybe handling with be compromised in some way
Yes, but change all 4 if you are going to do it. IMO of course. A space saver spare kit off ebay would also be a good idea.And is there an issue with the fronts being standard tyres and the rears being runflats? I assume the ride and maybe handling with be compromised in some way
I had the same issue on our E92, was hoping to get some non run flats and was told all sorts (Wheel lip is longer, suspension different etc) but lots of Z4 owners move from Run flats to non Vreds Sessanta's with no issues.
However, after having a blowout at 70 and barely noticing apart from a massive bang, we've kept them on.
However, after having a blowout at 70 and barely noticing apart from a massive bang, we've kept them on.
Be a bit careful as I have heard rumour that it could be considered a mod by your insurance co if the car was meant to have runflats, and they may not pay out if you have an accident and you've not told them you've modified your car. Let me be clear though that i've no solid proof that that's the case, but knowing insurance co's...
I've got runflats on the front and non-runflats on the back of my 330i and I am still alive!! I am still yet to hear of a valid reason why it is in anyway dangerous to mix and match in that way as long as they are in pairs.
I'll change the fronts to non-runflats when they need changing and I have a can of tyre goo and a pump in the boot for the rears.
I'll change the fronts to non-runflats when they need changing and I have a can of tyre goo and a pump in the boot for the rears.
Shed01 said:
Be a bit careful as I have heard rumour that it could be considered a mod by your insurance co if the car was meant to have runflats, and they may not pay out if you have an accident and you've not told them you've modified your car. Let me be clear though that i've no solid proof that that's the case, but knowing insurance co's...
Pretty confident this isn't the case. Or at least that the onus would be on an insurance company to demonstrate why they were a contributory factor to your accident. Which would be borderline impossible.Otherwise they'd be in the awkward position where they'd need to specify approved brands etc.
Prof Prolapse said:
Pretty confident this isn't the case. Or at least that the onus would be on an insurance company to demonstrate why they were a contributory factor to your accident. Which would be borderline impossible.
Otherwise they'd be in the awkward position where they'd need to specify approved brands etc.
The advice I was given was to check - it seems every company has a different view and it's not worth the risk of having them wriggle out of a claim because you didn't inform them. LV they said there wouldn't increase the premium but they'd make a note of it.Otherwise they'd be in the awkward position where they'd need to specify approved brands etc.
Have run non RFT's on the rear and RFT's on the front of a 2008 E61 for 12 months without issue. Will finally be changing the fronts to non RFT's next month as they have finally worn out.
The difference in ride quality is simply astonishing.
Agree on the insurance comment, worth letting them know as it would be a "modification from standard". Made no difference to the premium.
The difference in ride quality is simply astonishing.
Agree on the insurance comment, worth letting them know as it would be a "modification from standard". Made no difference to the premium.
Edited by SWoll on Thursday 29th November 13:12
T1berious said:
I had the same issue on our E92, was hoping to get some non run flats and was told all sorts (Wheel lip is longer, suspension different etc) but lots of Z4 owners move from Run flats to non Vreds Sessanta's with no issues.
However, after having a blowout at 70 and barely noticing apart from a massive bang, we've kept them on.
What was the cause of your blowout?However, after having a blowout at 70 and barely noticing apart from a massive bang, we've kept them on.
Nah, not something I'd report and, whilst I agree with declaring actual modifications, I don't think it's a precedent we should be keen to set.
The fact it's run flats or not doesn't have any intrinsic detrimental effects. Same as changing tyre brands or replacing shocks or brake components to similar spec ones.
IMO, you just use common sense with regards to advising your insurer. The spirit of the question is that it will affect the car performance or it's value, neither of those is measurably affected in this case. Of course they'll "write it down" if you ask though.
Just my two pence of course.
The fact it's run flats or not doesn't have any intrinsic detrimental effects. Same as changing tyre brands or replacing shocks or brake components to similar spec ones.
IMO, you just use common sense with regards to advising your insurer. The spirit of the question is that it will affect the car performance or it's value, neither of those is measurably affected in this case. Of course they'll "write it down" if you ask though.
Just my two pence of course.
My BMW dealer mentioned to me about the lip in the wheels being designed for runflats so you run the risk of non runflats popping off the rim. I wasn't buying tyres at the time so they had no reason to lie to me.
I've never driven my car without runflats. The thing with tyres is it's not like you can just try them out for a couple of days to see if you like them and then give them back if you don't, it's shelling out £700 for what could be no difference.
I've never driven my car without runflats. The thing with tyres is it's not like you can just try them out for a couple of days to see if you like them and then give them back if you don't, it's shelling out £700 for what could be no difference.
ThunderSpook said:
My BMW dealer mentioned to me about the lip in the wheels being designed for runflats so you run the risk of non runflats popping off the rim. I wasn't buying tyres at the time so they had no reason to lie to me.
I've never driven my car without runflats. The thing with tyres is it's not like you can just try them out for a couple of days to see if you like them and then give them back if you don't, it's shelling out £700 for what could be no difference.
When you put the reg number into these tyre websites, it includes all standard tyres as being suitable for the car. How reliable that is I don't knowI've never driven my car without runflats. The thing with tyres is it's not like you can just try them out for a couple of days to see if you like them and then give them back if you don't, it's shelling out £700 for what could be no difference.
ThunderSpook said:
My BMW dealer mentioned to me about the lip in the wheels being designed for runflats so you run the risk of non runflats popping off the rim. I wasn't buying tyres at the time so they had no reason to lie to me.
I've never driven my car without runflats. The thing with tyres is it's not like you can just try them out for a couple of days to see if you like them and then give them back if you don't, it's shelling out £700 for what could be no difference.
This is completely incorrect, there is no risk of a non run flat tyre popping out of a runflat rim due to the rim construction.I've never driven my car without runflats. The thing with tyres is it's not like you can just try them out for a couple of days to see if you like them and then give them back if you don't, it's shelling out £700 for what could be no difference.
Rims designed for runflat tyres should have an extended hump on the inside of the bead, this is to hold the tyre in place when deflated, the majority of modern rims will have a hump anyway although it may not be a large, rims with this hump are some time known as safety rims, as they were designed to stop the tyre separating from the rim during a blow out, and this dates back to well before there even were run flat tyres as we know them now
ging84 said:
ThunderSpook said:
My BMW dealer mentioned to me about the lip in the wheels being designed for runflats so you run the risk of non runflats popping off the rim. I wasn't buying tyres at the time so they had no reason to lie to me.
I've never driven my car without runflats. The thing with tyres is it's not like you can just try them out for a couple of days to see if you like them and then give them back if you don't, it's shelling out £700 for what could be no difference.
This is completely incorrect, there is no risk of a non run flat tyre popping out of a runflat rim due to the rim construction.I've never driven my car without runflats. The thing with tyres is it's not like you can just try them out for a couple of days to see if you like them and then give them back if you don't, it's shelling out £700 for what could be no difference.
Rims designed for runflat tyres should have an extended hump on the inside of the bead, this is to hold the tyre in place when deflated, the majority of modern rims will have a hump anyway although it may not be a large, rims with this hump are some time known as safety rims, as they were designed to stop the tyre separating from the rim during a blow out, and this dates back to well before there even were run flat tyres as we know them now
I read loads of review from people who've switched from runflats on 3s and 5s and everyone comments on how much the ride and grip improves.
The only negative is not having a spare if you get a flat.
With regards to them being classed as a mod..
I'm swapping RFTS off my 335d to Hankook Evo 2's. I'm insured with Swiftcover (Axa group) and I've had it in writing off them that they've no issue with me using non-runflat tyres.
My father has a 120d with RFTS and he contacted Shiela's Wheels and they class them as a modification that they have to know about and charge accordingly!
I'm swapping RFTS off my 335d to Hankook Evo 2's. I'm insured with Swiftcover (Axa group) and I've had it in writing off them that they've no issue with me using non-runflat tyres.
My father has a 120d with RFTS and he contacted Shiela's Wheels and they class them as a modification that they have to know about and charge accordingly!
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