Trunkz

A few weeks ago, I changed my nearside rear tyre as it was nearing the limit. I currently run f1 eagles on all four corners; since then whenever I'm on the motorway and i decelerate or accelerate, the rear end doesnt run true and the car twitches. (Its really nerve-wracking especially when taking long bends at those sort of speeds) Now this has usually happened in the past when tyre pressures were not at 32psi, and I have checked this. I have balanced the rear tyres (25 and 15 respectively) so its not that. I did jack up the rear on the diff, and noticed that the inside of the rear driver wheel was bouncing up and down. I'm assuming this means a buckled wheel? I also tend to hear knocking / plonk sounds from the rear when going over potholes or over speed bumps as well. I've got some time on a mechanics ramp on saturday so would really like to fix the issue then. Is there anything I can do between now and then to check what the issue is, and purchase parts in preparation?

Daytona-Dave

You have changed one rear tyre, how much tread is there on the other plus the rubber will have hardened on the older tyre

cheshire_carper

Bloke changes one tyre and can't understand why things are different.

It's a mysterious world out there.

RichwiththeS2000

Unless the treads are similar, its going to feel really weird. Change the other rear too and see how you get on. I think they would have noticed if a wheel was bent when they balanced it.

Checked your geo recently? Could be out and the new tyre is just amplifying it.


Another thought, but I think there are a couple of different 'versions' of the F1 as well for different load-ratings. Did you get the same version?

mikey k

bad idea doing just one tyre!

Trunkz

Really? I changed the driver side tyres back in September before megameet. There's loads of tread on that tyre. I didn't have this issue back in September when changing the driver side rear. Only came about when changing the passenger side rear.

mikefifth

Without wanting to trach you to suck eggs, the car is rear wheel drive, best do rear tyres in pairs.

unclefester

I would check tyre pressures / wheel alignment / geo / binding brake / possibly diff fluid.

MSC

As others have said and I agree its most likely the fact you didn't replace both tyres on the rear axle. This is one of the ten commandments of rear wheel drive ownership and maintenence

martin j

I had similar thread recently when changing tyres(I did all four though) and now done more miles it is better but still seems to be a bit like yours, on/off throttle on bends unsettles it, going to get the geo checked since maybe more tread is amplifying the effects of misalignment?