Car tyres.

[maggie01]

I know nothing about them but my car went in for service on Tuesday and they found I had a nail in one tyre which couldn't be repaired. I had a new tyre put on. Now the car feels very lumpy as in you can feel all the bumps in the road. Took it back to the garage today and they said it could be the pressure in the new tyre so they checked that and it was ok. The tyre is a different make to the ones already on there and they are going to change it on Monday. Does anyone know if this could be the cause. I have a Kia Picanto and I took it to a Kia garage.

[Toureman]

You don't know anything about cars! Neither does your Kia dealer!

Tyres should never be miss matched on the same axle, the dealer has now probably realised this thats why they have so readily agreed for a change.

IT would have been safer and cheaper to go to a tyre specialist company.

[NORMANTHEDOG]

and cheaper

[maggie01]

I will know that next time, but I thought they would know what they are doing and while they were doing the service I thought it was easier to have the tyre changed at the same time. You live and learn.

[woodchopper]

I agree with Toureman - from personal experience don't mix tyres on the same axle.

[Gef]

There is nothing wrong with mixing tyres by different manufacturers as long as they are the correct size and type.

[maggie01]

Yes Gef but do they have to have the same type of tread? There is definately something wrong as my car no longer has a smooth ride.

[kramer81]

You cannot mix radial and cross ply tyres on the same axle but modern tyres are all radial I think. I always try and have the same type of tyre across an axle in the interest equal grip at both sides but having different brands of tyres shouldn't cause the ride to be lumpy. Maybe the tyre is defective

[woodchopper]

Gef - your head is stuck somewhere it shouldn't be - Mixing different makes of tyres on the same axle in unwise and potentially unsafe.
My last car had four Goodyears - got a puncture one day and stuck the Michelin spare on - result = car turned a right hand corner sharper than it turned a left - very hairy ride - needless to say the Michelin didn't stay on long.
I worked for a tyre manufacturer for several years and even they said it is best not to mix tyres especially on the same axle.
Different tryes can be constructed differently and so affect the handling of the car - some tyres are comparable in the handling/grip capabilities - some, like I found out are not.

[maggie01]

Thanks for all the replies. I see that some peoples opinions differ. I am still concerned that the tread on the tyres are totally different and hopefully when I take it back tomorrow it will be resolved.