Tyres

M

mistralbadger

Member
Just bought a 2.5i sport Z4, (07 plate) as a second car for summer fun days with an open top. Love the car - not too keen on the ride at low speeds on minor roads. Steering feels fidgety and there is a tendency to tramline and ride is pretty harsh. The car has 225x40x18s on the front and 255x35x18s on the rear. All runflats. Any advice on swapping the tyres to improve the ride?
 
Removing the runflats will stop the tramlining and transform the ride, loads of threads on here and other forums :thumbsup:
 
As the Tyreman says, I had the same experience when I got my car on runflats, make sure you have a competent 4 wheel alignment as well and chances are you will see a huge improvement :thumbsup:
 
As above. Just getting rid of the runflats will make a huge difference. Choice of make to replace them is personal choice but I would go for a premium brand.
 
Thanks to all who sent replies.

Looks like I might have to bite the bullet and ditch the runflats.

What do you do though if you get a puncture?
 
I'd recommend Goodyear Eagle F1 Asymmetric 3

Most members carry around a tyre weld kit and a small compressor

Screen Shot 2018-03-11 at 12.06.17.png
 
Marlon said:
I'd recommend Goodyear Eagle F1 Asymmetric 3

Most members carry around a tyre weld kit and a small compressor

Screen Shot 2018-03-11 at 12.06.17.png
Click to expand...
I'm with you on that. I also have an old E46 wheel in a wheel bag in the boot, with an old E46 jack tucked in the wheel.
 
Marlon said:
I'd recommend Goodyear Eagle F1 Asymmetric 3

Most members carry around a tyre weld kit and a small compressor

Screen Shot 2018-03-11 at 12.06.17.png
Click to expand...

+1 on the holts tyre weld. It's alot easier than many of its competitors for a tyre fitter to clean out.
I carry a couple of the 500ml cans and store them in the little compartment behind the battery where the amp for the carver stereo system lives on pre facelifts. They moved the amp to the bulkhead on post facelifts so its a good place to store them on these too.

To aid comfort a little more you could opt for M tyres sizes with 5% higher side wall. It's not to everyone's tastes but does help. Either way an alignment will help aswell.
 
Get rid of the runflats. It will make a big difference to the ride.

I have an E46 space saver and jack in the boot.
 
I changed to Pilot sport 4s too, I was worried about punctures also but I keep a puncture repair kit, a holts tyre weld can and a 12v compressor in the boot :thumbsup:
 
I'm planning on ditching the RFT's too.

I've got 2 cans of Holts, a compressor, an E46 space-saver and a jack and wheel-brace - that should cover most eventualities! RAC card in case I missed something. :lol:
 
My runflats have plenty of tread left so I'll probably run them for a while and when its time to change go for non-runflats.

I have small problem though and that is that the tyre pressure sticker that BMW put on the drivers door pillar has worn off, so I don't know what pressure to set the runflats to. Fronts are 225 x 40 x R18. Rears are 255 x 35 x R18. Can anyone advise on the recommended pressures?
Can you get a replacement sticker for the door pillar?
Also if you switch to non-runflats will the optimum pressure values change?
 
mistralbadger said:
My runflats have plenty of tread left so I'll probably run them for a while and when its time to change go for non-runflats.


I have small problem though and that is that the tyre pressure sticker that BMW put on the drivers door pillar has worn off, so I don't know what pressure to set the runflats to. Fronts are 225 x 40 x R18. Rears are 255 x 35 x R18. Can anyone advise on the recommended pressures?
Can you get a replacement sticker for the door pillar?
Also if you switch to non-runflats will the optimum pressure values change?
Click to expand...

What car do you have buddy?
 
Hi Guys,

If you switch from the runflats on the Z4 to normal tyres, would you keep exactly the same size spec (like for like).
Obviously the rim radius will stay the same but what about width and aspect ratio. e.g. My runflats are 225/40/18 on the front and 255/3518 on the rear. I want to swap for goodyear eagle F1/Asym 3. Would you keep exactly the same size specs for these non runflats?
 
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