Re: 8" Wide Wheel, 225 or 235 tire? (sanatarium)

235 for sure. But it might rub.

Look at the specs - 235 section widths are much wider than 225's. It's a big jump. Typically 235's are on much larger cars, you see them on S80's for example. 225's are a better match to the car IMO, but if you're going 8...

Tom.

 

235mm tire is the best match for a 8" wide wheel for sure.

 

How about in terms of diameter? 45 sidewall on both.

 

Re:

225 is the best match for an 8" wide tire.

 

Re: Re: (uv23)

Quote, originally posted by uv23 »

225 is the best match for an 8" wide tire.

225 is the best match for an 8" wide wheel?

You realize that the increased sidewall rigidity you get from stretching a 225 over an 8" wheel is more than offset by the extra tread you would get from using a 235? Why do you think virtually every car manufacturer equips 8" wide wheels with 235s? Take the R for instance. Or the Evo MR. Or the STi. Or pretty much any other car w/ an 8 in wide wheel...

 

Re: (sanatarium)

Quote, originally posted by sanatarium »

How about in terms of diameter? 45 sidewall on both.

235/45-17 is a little large, but only a couple of %. You can actually have the speedo corrected to match, if you keep them on all year.

Tom.

 

205 stretched Vortex style!

 

Re: Re: (Saucy)

Quote, originally posted by Saucy »

225 is the best match for an 8" wide wheel? You realize that the increased sidewall rigidity you get from stretching a 225 over an 8" wheel is more than offset by the extra tread you would get from using a 235? Why do you think virtually every car manufacturer equips 8" wide wheels with 235s? Take the R for instance. Or the Evo MR. Or the STi. Or pretty much any other car w/ an 8 in wide wheel...

Yes, I meant wheel. 225 does not need to be stretched to fit over an 8" wide wheel. 225s will accomodate 7.5" to 9". 235s will accomodate 8" to 9.5". Additionally, 225/40/18 is a perfect upsize from a 205/50/17 or 225/45/17 tire (0.04% variation), which is what you'll typically find in vehicles with stock 17s, whereas a 235 width tire will add to the stock diameter (1.3%). Lastly, you'll have less chance of rubbing. The front arches on the S40 and C30 are rather tight.

 

Hmm. I've been told that a good rule of thumb for street tires is that they be about an inch wider than the wheels on which they are mounted.

225 millimeters = 8.86 in
235 millimeters = 9.25 in

So they are roughly equidistant from 9".

Those who swear by putting narrower tires on wheels insist that the benefits turn-in and responsiveness from the increased sidewall rigidity outweigh the better grip provided by wider tread.

So I retract what I previously said. There are pros and cons of both tire sizes, and depending on what a driver values, the 225s may be better suited to his or her needs.

 

Yeah sauce was running 10 in wide HRE's so watch him.lol

 

Re: (PornSStar)

on a 17 x 8 45mm offset. You can go with both a 225 45 17 and a 235 45 17. I'd go with the 235s (I like em wide.. tires that is)

but you really can't go wrong either way. Let us know what you decide.

 

Well, I found a fantastic set of 17x8s and I'll pick up some 235 tires, maybe Potenza RE-01Rs if I can find the cash, otherwise FK452s again. Still waiting on the offset of the wheels though, they are new on Tirerack so they don't have any weight or offset data. Hopefully they will be 45mm.

Link to the wheels I am looking at, (it appears Tirerack updated this page, it used to say reccomended tire size was 215/50 17): http://www.tirerack.com/wheels...Brand

 

Re: (sanatarium)

the 215 50 17 will also fit although it will be a tad on the narrow side. the C70 gets this size with their stock 17 x 7.5 wheels 45 mm offset, (as well as a 235 45 17 on the same size wheel, a tad wide IMO but works) and of those will work.

 

Following up here - for a 225/45R17 tire, what was the most aggressive offset possible for a 17 x 8 wheel without rubbing at max lateral acceleration?


I've been running 225/45R17s on Styllas with absolutely no problem. This season, am looking to go to a wider wheel/more aggressive offset.

 

Re: 8" Wide Wheel, 225 or 235 tire?

I have 235 on 8" and ET 38

In front I am absolutely max (rubbing inner flare but not the fender) so since you have 5mm less tire on the outside I would say 35 would be max for no rub.

In rear depends if you roll your fenders. Mine are rolled so no idea. Problem is that if you get flush in front and don't roll the back it will look weird.. Our cars have like 15-20mm of metal that you need to roll or have the tires tuck inside.

Sent from my Nexus 7 using Tapatalk 2

 

LOl, I'm going to pull that sketch for the rear

This is with 18x8 wheels on 225x40 tires, with 45 ET and -1.5° camber and H&R spring drop + Bilstein B8 (new shocks raised it back a little) on a FWD and the Michelin tires have a pretty casual round on corners.
I have rubbed in conditions such as load in the trunk, during aggressive cornering, and with passengers in the back (that was the worse).

Take the tire profile into account as well as the camber.
225x40 on 18 is a better match than 235. I'm not sure on 17 though. I'd have to calculate the difference.

 

225 / 35 / 19 on 8" ET 38.
i certainly would not call 225 on 8" too much of a stretch.
dont mind the bend in the wheel...it has since been fixed..

 

Man that must have been quite a rub to hit the wheel that hard . . .

+1 on Slasher
:thumbup:

225 on 8 is hardly a stretch. You just don't get as much rim protection but despite this counter example I still prefer it flush or close to. Needless to say it depend on the tires as well!

It may not look like it but the rubber still pokes out of the rim here.

 

To BeachBoy, TG and Slasher, thanks for the great info. Fantastic photography and drafting skills TG!

 

225's I'd do the 50 Ratio : Hey , but that's Me - so I'd be able to crack 60 MPH in second gear - No shifting - really would Knock down the time .

A Slight stretch as those call for 7" rims - You'll be able to pump up the tire pressure a little Firmer 2 psi above what You Normally run .

Before You say It - Yes - 2 psi Will Increase - Mpg - maybe Handling a smidgin also .

Nice Bead protection . I may have to do the same things . :beer:

 

Anyone have 235/40/18 on their S40? I'd be curious to see that. I always thought 225 was the most a person should go-still do and thanks TG.

Hek, I'd still like to get a 225/50/18 tire if I could, just so I could get more rubber than a 40 profile.

 

This is what it looks like on a V50. Because of the rubbing, I'm now running on 225. My car is also lowered with H&R springs.

 

I used to have 234/40/18 Goodyear tires on my 18x8 Heico Volutions (with H&R springs and rolled rear fenders). Hope this helps.

 

I've got 225/35 R19 on a 8.5" width rim... It is slightly stretched...

 

To be fair the C30 has more fender room than s40/v50


@VVS40: what is that front brake caliper kit you are running?

 

@VVS40: what is that front brake caliper kit you are running?

BBK is by WP Pro. 6pot Calipers and 336mm cross-drilled rotors.

 

Not really... My rims are about ~2 mm from rubbing inside and the 225 tyre just misses the fender/wheel arch by ~1 mm At front at least... The rears are large enough for ~255 width tyres