Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: custard1 on 06 May 2012, 22:32:05

Title: Does it matter?
Post by: custard1 on 06 May 2012, 22:32:05
Right before i buy some tires, does it matter if the size is 245/45/17 insead of 235/45/17 as they will be going on the rear only i thought it wouldnt matter but i just wanted to check.
Title: Re: Does it matter?
Post by: Brikhead on 06 May 2012, 22:35:06
If it were me then I'd try and fit the same size tyre as fitted by the manufacturer, or at lest try and keep to the same overall diameter (245/40 maybe?).

You may risk upsetting the a.b.s. system otherwise.
Title: Re: Does it matter?
Post by: custard1 on 06 May 2012, 22:41:54
The first number is the width bud in mm
Title: Re: Does it matter?
Post by: Brikhead on 06 May 2012, 22:46:35
The first number is the width bud in mm

The second number is how you work out the the side wall height, granted it's close but not a perfect match...
Title: Re: Does it matter?
Post by: custard1 on 06 May 2012, 22:54:07
The only difference is the first number bud nothing else
Title: Re: Does it matter?
Post by: Kevin Wood on 06 May 2012, 22:57:52
The only difference is the first number bud nothing else

Yes, and diameter is a function of the width so it will be out.

Who knows if it'll be enough to upset the ABS or if the wider tyres will fit correctly on the rims? I'd just get the right size. Fitting anything different will be a modification, so might affect your insurance. Not worth it. IMHO,
Title: Re: Does it matter?
Post by: Brikhead on 06 May 2012, 23:03:33
The only difference is the first number bud nothing else

The second number is a percentage of the width (or first number).

45% of 245 m.m.'s is not the same as 45% of 235 m.m.
I'm 5hit at maths but even I can work that out.
http://en.wikipedia.org/wiki/Tire_code
Tire is the same as tyre, btw, just I'm not a yank.
Title: Re: Does it matter?
Post by: Nick W on 06 May 2012, 23:03:39
The only difference is the first number bud nothing else

But the second number is the height of the sidewall expressed as a percentage of the width.
So a 245/45x17 has a sidewall taller than a 235/45x17. The difference is small, about 6mm.
So it probably won't make enough of a difference to the diameter, and more importantly the circumference, to actually matter.
Title: Re: Does it matter?
Post by: custard1 on 06 May 2012, 23:40:05
To be fair i dont really know much about tyres as they do my head in when i have to buy them as they cost so much
Title: Re: Does it matter?
Post by: feeutfo on 06 May 2012, 23:48:15
Right before i buy some tires, does it matter if the size is 245/45/17 insead of 235/45/17 as they will be going on the rear only i thought it wouldnt matter but i just wanted to check.
Makes no odds on the rear as far as physical fit goes.

Add in rim protection on the front for that size and it gets tight to the shock body.

Abs will be fine.
Title: Re: Does it matter?
Post by: Brikhead on 06 May 2012, 23:52:25
To be fair i dont really know much about tyres as they do my head in when i have to buy them as they cost so much

Simple advice would be to stick with the manufacturers recommended sizes and buy the most expensive brand you can afford!
Title: Re: Does it matter?
Post by: GmasterT on 06 May 2012, 23:56:46
245 would be ok but a bit baloony for a 7.5 rim. If its cheapness you're after then 225 45 would be fine :)
Title: Re: Does it matter?
Post by: feeutfo on 07 May 2012, 00:06:40
Applogies, been a long day. Wouldn't go wider than 235 on a 7.5 rim.

Got fuddled with my own sizes. 18's here.  :-[
Title: Re: Does it matter?
Post by: blackviper90210 on 07 May 2012, 09:16:31
Applogies, been a long day. Wouldn't go wider than 235 on a 7.5 rim.

Got fuddled with my own sizes. 18's here.  :-[

You bragging again Chris?  ;D ;D ;D ;D
Title: Re: Does it matter?
Post by: custard1 on 07 May 2012, 10:25:20
Thank you all for helping me trying to figure this out, i will now find some that i have money for, i have only got 200 quid
Title: Re: Does it matter?
Post by: doz on 07 May 2012, 10:30:48
If you've got a friendly garage who are willing to jump the tyres for you then these are the cheapest place I've found to supply them

http://www.camskill.co.uk/ (http://www.camskill.co.uk/)
Title: Re: Does it matter?
Post by: 2woody on 07 May 2012, 12:44:42
yes it does matter.

yes they're bigger diameter ( quite a bit actually )

and yes, it will affect the ABS - it'll increase your stopping distances

sorry.
Title: Re: Does it matter?
Post by: custard1 on 07 May 2012, 12:50:28
thanks people i will sort myself out for some 235s
Title: Re: Does it matter?
Post by: JamesV6CDX on 07 May 2012, 15:31:31
Thank you all for helping me trying to figure this out, i will now find some that i have money for, i have only got 200 quid

I had some Events fitted to my 17's at Wheels in motion for 50 something quid a corner. Done 5000 miles so far, very impressed for the money.