Floaty front end on motorways after tyre change

KryStallone · Post by **KryStallone** » Wed Mar 16, 2022 12:49 am

Hi, I recently replaced the stock RFT’s with Non RFT GY Asymmetric 5’s all round. I’ve noticed the car feels more floaty on motorways than before which is disappointing. I’ve read some post that suggest I need to let the new tyres bed in? Is it really just a case of being patient? If so how many miles? Or could the alignment be an issue even though just fitted?

Is straight line ‘floatiness’ (feels like driving in a gusty wind, doesn’t feel like tramlining) a characteristic of the Z when stock, as I have noticed it before, or should it feel planted when accelerating on the motorway?

TIA.

2012 E89 28i White on 19”

Smartbear · Post by **Smartbear** » Wed Mar 16, 2022 12:54 am

KryStallone wrote: ↑Wed Mar 16, 2022 12:49 am Hi, I recently replaced the stock RFT’s with Non RFT GY Asymmetric 5’s all round. I’ve noticed the car feels more floaty on motorways than before which is disappointing. I’ve read some post that suggest I need to let the new tyres bed in? Is it really just a case of being patient? If so how many miles? Or could it be the alignment not done properly?

Is straight line ‘floatiness’ (feels like driving in a gusty wind, doesn’t feel like tramlining) a characteristic of the Z when stock, as I have noticed it before, or should it feel planted when accelerating on the motorway?

TIA.

2012 28i White on 19”

What tyre pressures are you using?
Rob

KryStallone · Post by **KryStallone** » Wed Mar 16, 2022 12:58 am

Hi, Whatever the tyre fitters set when they fitted.

What would you recommend and I’ll compare / adjust and report back.
Thanks!

Smartbear · Post by **Smartbear** » Wed Mar 16, 2022 1:01 am

KryStallone wrote: ↑Wed Mar 16, 2022 12:58 am Hi, Whatever the tyre fitters set when they fitted.
What would you recommend and I’ll compare / adjust and report back.
Thanks!

Most people reduce pressures compared to the runflat pressures, i run 32f 34r - lots of info on here if you use the search function.
Rob

KryStallone · Post by **KryStallone** » Wed Mar 16, 2022 2:19 am

Smartbear wrote: ↑Wed Mar 16, 2022 1:01 am
Most people reduce pressures compared to the runflat pressures, i run 32f 34r - lots of info on here if you use the search function.
Rob

More info than I realised. Thanks!!

brillomaster · Post by **brillomaster** » Wed Mar 16, 2022 9:34 am

you do often need to let tyres bed in a bit too... should be performing optimally after about 200 miles i'd say.

KryStallone · Post by **KryStallone** » Mon Mar 28, 2022 12:51 am

All sorted. Numb nuts at the tyre garage massively over inflated the tyres!!

jenniferlouise · Post by **jenniferlouise** » Fri Apr 01, 2022 10:40 am

KryStallone wrote: ↑Mon Mar 28, 2022 12:51 am All sorted. Numb nuts at the tyre garage massively over inflated the tyres!!

“Numb nuts”

you don’t hear / see that quoted anywhere near enough…

noz85 · Post by **noz85** » Wed Jun 14, 2023 9:50 pm

When we got my wifes E89 it had potenzas on the front and new Landsails on the rear. The car was F'ing dangerous. Swapped the wheels round front to back to test and it was like a different car. So the landsails went.

Hopefully this isn't the same problem for you!

Z4-forum.com

Z4-forum.com