it seems to me that the Kumhos(225) are smaller than other brands(225) because i have seen multiple 225/45 tires mounted on the stock SRT-4 rim and only the Kumhos looked right, wonder why that is??
This unstability under load (when cornering) may cause the sidewall to "buck" or "roll" over the wheels rim edge quite possibly puncturing the tire and causing it to fail. This is not something you want happening traveling at a high speed.
89 shelby daytona 16 by 6 , 91 shelby daytona 16 by 6 , And my 05 srt-4 17 by 6, exactly when is dodge going to learn to give us at minimum a 7 in. wide wheel?
'99 Dakota R/T, 17 x 9 (including the factory spare, which is the exact same wheel/tire and stock for stock, no where near as fast as the SRT. They should have at least gone with 7s for the SRT!
well i just mounted my 225's on some stock wheels again, i got the tires for $150, its worth a shot, didnt have problems last year... ill keep ya posted
it seems to me that the Kumhos(225) are smaller than other brands(225) because i have seen multiple 225/45 tires mounted on the stock SRT-4 rim and only the Kumhos looked right, wonder why that is??
It's very likely that the Kumhos are smaller than other 225's. My 205-55-16
Goodyear Eagles have a half-inch wider tread section than the stock 205-55-17 KDW's. My 16's are on 16x6.5 VW Beetle steelies, which are a half-inch wider than the stock rims, but I don't think that this would make the tread section wider (maybe flatter..?).
The sidewall aspect ratio itself changes the size of the tire, even if it's the 'same' stated width, but most of the 15 and 16 inch '205' tires I've seen were very close to the 17" KDW for tread section width. I'd say that my Eagles are wider in tread section than any other '205' tire I've seen (be they 15's, 16's or 17's).
Generally, any 225 tire should be on a 7" wide rim, but if the Kumhos are 'smaller' enough, they may in fact be fine on a 6" wide rim for practical purposes (but that's not a use that Kumho's lawyers would encourage!).
A 225/45/17 tire could be specially engineered by a tire company to be safely mounted and used on 6" wide rims, but I'd bet that this kind tire would not work well on 7 or 8 inch wide rims, and it's probably not economically feasible to sell a 225/45/17 that works only on 6" wide rims ...
This isn't rocket science so there is absolutely no reason to make this complicated. So lets begin...
Can a 225/45/17 be mounted on the stock 17x6 wheel?
YES.
Has anybody here mounted a 225/45/17 on the stock wheel?
YES.
Is it safe to mount a 225/45/17 on the stock wheel?
NO. The reason being is that a 225/45/17 is designed to mount on a minimum wheel width of 7". The stock wheel is 1 inch shorther in width which will cause the sidewalls to become pinched inwards causing a unstable sidewall. This unstability under load (when cornering) may cause the sidewall to "buck" or "roll" over the wheels rim edge quite possibly puncturing the tire and causing it to fail. This is not something you want happening traveling at a high speed.
Has anyone ever had a problem with a 225/45/17 on the stock wheel?
I remember reading about one person having a blowout but other than that no one has ever reported any issues.
Does a 225/45/17 give more grip and traction on the stock wheel?
It may offer a slight improvement in traction but handling will suffer due to the reasons mentioned above in regards to the sidewall.
I don't claim to know anything about anything, but...
I am reading here in my July 1988 Hot Rod mag ("Dashing Daytonas", pg. 102) that the '88 Daytona Shelby Z (one of which I owned) "came equipped" (I have to assume that's from-the-factory) "with P225/50VR15 Goodyear Eagles on 15x6.5 cast aluminum wheels". That would suggest that 225s should fit fine on 7" wheels, right? Or is the issue the lower sidewall of the /45?
I don't remember anything "floaty" about the front of the Daytona. I could brake very late and drift the rear end under braking then accel. out without a sweat. It never needed an alignment either. (btw - I can hardly believe that after 15 years of suspension development that it pulls the same skidpad g's as a new SRT-4 = need more rubber).
Good thread - please respond - and thanks!
yes, it's the tire profile that makes all of the difference in whether a 225 width tire fits on one wheel width but not another. 225/50 is good for a 6-8" wide wheel, 225/45 for a 7-8.5" wide wheel, 225/40 for a 7.5-9".
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and stock for stock, no where near as fast as the SRT. They should have at least gone with 7s for the SRT!
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