Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: the_omega_man on 23 February 2011, 20:27:27

Title: wrong size tyres?
Post by: the_omega_man on 23 February 2011, 20:27:27

ive noticed that my front tyres are 215/55/r16 but the rear are 225/55/r16 would this cause my car to wander? also rears are bald on the inside

another problem ive got is every so often im getting an error code 0115 engine coolant sensor failed should i be worried

Title: Re: wrong size tyres?
Post by: dbr on 23 February 2011, 20:32:03

All F1 cars have diff size front to back. they wonder about. However Its more likely something ....bushes are knackered

Title: Re: wrong size tyres?
Post by: cem_devecioglu on 23 February 2011, 20:32:26

their radius different :-/

Title: Re: wrong size tyres?
Post by: mkirky on 23 February 2011, 20:38:20

Yes

Title: Re: wrong size tyres?
Post by: mkirky on 23 February 2011, 20:40:59

Google tyre calculator and put in your sizes and it will give you your radius

Title: Re: wrong size tyres?
Post by: Andy H on 23 February 2011, 20:54:31

Omegas are prone to trashing front tyres due to too much positive camber (caused by soft wishbone bushes and incorrect alignment) wearing the inside edges.

My guess is that the front camber is out and the tyres that are currently on the back of your car were previously on the front.

I think this FAQ gives all the standard tyre sizes Omega Tyre Pressures (http://www.omegaowners.com/forum/YaBB.pl?num=1176583378)

Title: Re: wrong size tyres?
Post by: ffcgary1 on 23 February 2011, 20:55:06

In theory as long as they are the same size on each axel it should not be an issue, but it could be a factor to consider.
Both are std fitment sizes to the omega range so you will need to decide what size tyres you are going to use, then fit all four to the car and then have the suspension checked over to find any faults.
You might find that the car drives fine but this car is almost 2 tons in weight so will almost certainly need bushes to be replaced on the front wishbones. Then a trip to WIM at Chesham to make the final fettling to finish off. :y

Title: Re: wrong size tyres?
Post by: 2woody on 24 February 2011, 12:40:52

Quote

Google tyre calculator and put in your sizes and it will give you your radius

 bet it's wrong....!

for reference, the radii concerned are..... 11.6 and 11.7 inches, which is nothing to worry about.

Title: Re: wrong size tyres?
Post by: cem_devecioglu on 24 February 2011, 14:24:50

Quote

Quote

Google tyre calculator and put in your sizes and it will give you your radius

 bet it's wrong....!

for reference, the radii concerned are..... 11.6 and 11.7 inches, which is nothing to worry about.

yep..will have no effect on slow speeds.. but when you are traveling fast enough your brake distance and cornering capabilities will be effected in measurable amounts..