conflicting views on tyre size

wotugonado · July 30, 2013, 22:58

Sorry people I know its been done to death but..............................................

I'm looking for some new tyres but getting conflicting views on tyre width, I have brought new 7j rims, recommended on here 225 toyos other websites are saying 225 are too wide for a 7j rim and 215 is the maximum. But then will having 195 on the front and 215 on the rear not give a big enough stagger ? Just looking for confirmation that these are definitely ok before I spend my hard earned........................

MattPerformance · July 30, 2013, 23:19

It depends on the profile: 225/40(16) is not approved on a 7J whereas 225/45(16) is (the high side wall allows for the tyre to be pinched in a bit for the narrower rim)

jonty · July 30, 2013, 23:48

20mm stagger is all a PFL gets so can't be that bad if you go for 215s rear s:)

s:)

Wabbitkilla · July 31, 2013, 02:43

Toyo say 225/40/16 are too wide for 7" rims, but many people use them without issue end of story.
Personal preference, use them if you want.

Anonymous · July 31, 2013, 06:31

225 any size profile you should be fine. I run 225/45 now and use to run 225/35 both with no problems.

Barney Bear · July 31, 2013, 07:52

I've have 215/40/17 on the rear and 195/40/17 on the front offset now 38 but had offset of 40 with the old set for years both 7j and touch wood not had any issues
Tyres are Continetal s though

wotugonado · July 31, 2013, 21:30

Thanks for the replys, gonna have a shop around and see whats competitive on price

wotugonado · August 1, 2013, 20:58

well I cant seem to find 225/40/16 anywhere anyway ! the only place that has them in stock are asking for £191.32 per tyre which is quite a leap in price from what others have been paying. One chap I spoke to said toyo seemed to not have a lot of anything in stock at the moment and definitely none of these and nothing coming in for the foreseeable future. Seems like you lot bought them all up.....................

dori dori · August 1, 2013, 22:19

i replied to another thread further down but will sort number for a place local to me does a lot through ebay and stocks lots of toyo.

wotugonado · August 2, 2013, 17:33

Managed to find some 225 45 16 for £72 each so ordered those. Matt reckons theyre a better fit for 7j rims anyway.
Cheers dori still post it up when you find it as its good to have another supplier to turn to, cause all the usual suspects havent got any at the mo.

MattPerformance · August 2, 2013, 20:07

The fact that people are fitting 225/40 16 tyres to a 7J rim "without" problems does NOT mean that it is not potentially dangerous. ETRTO test wheels/ tyres configurations to establish what works. If something is not "approved" it might mean that it does not work (read: is unsafe) or it might mean that it is simply not tested. When a tyre that is too wide (or narrow) for a rim it means that its integrity on the rim is compromised. It may be that the compromise could lead to a failure. There are plenty of documented cases where people have fitted unapproved tyres to wheels (read: not ETRTO approved) and the tyres have come off the rim under hard cornering, often leading to crashes. There are of course many more cases of people who have had no issues, but ETRTO make recommendations for a reason and it's naive to disregard them. I don't know how cute insurance engineers are but I'd be very nervous if I had a major accident with "unapproved" tyres on my car. Some tyre specialists won't put unapproved wheels/ tyres together.

wotugonado · August 2, 2013, 21:04

Quote from: "MattPerformance"I don't know how cute insurance engineers are but I'd be very nervous if I had a major accident with "unapproved" tyres on my car.

Some tyre specialists won't put unapproved wheels/ tyres together.

Good call on the first point, hadn't even considered that, but as we all know insurance companies are looking for ever increasing ways of not to pay out on claims.

Second point was what concerned me, ive spoken to a tyre fitter and first thing he said when I said I would be supplying the tyres to be fitted is "make sure theyre correct for the alloy or I wont even attempt to fit them"

Raised some relevant points though so glad I asked the question, thanks all.

Also as these tyres seem to be becoming harder to come by (in my case anyway) what are decent/realistic alternatives ?

ChrisGB · August 4, 2013, 21:18

The other issue when a lower profile and narrow rim than recommended are combined is that the pinch causes some reduction in the width of the contract patch. The shorter the sidewall, the more pronounced the effect.

Chris

wotugonado · August 11, 2013, 10:12

Well I have to say you lot were right again, got the toyos on and cant quite understand how a set of tyres can make such a huge difference s:? :? s:? . It feels so much more planted than before and on pulling away in first they really grip and allow you to really launch off, which took me by surprise the first time nearly rear ending the car in front. All in all very pleased so far.