Widest Tire on 7 in Wheel?
11-03-2007, 06:50 PM
#1
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Thread Starter
Widest Tire on 7 in Wheel?
RL'ers is it possible to put a 225 tire on a 7 inch wheel? The 205's just seem to damned scrawny.
11-03-2007, 07:51 PM
#5
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I have personally seen a 225 tire (a race tire, which are wider than indicated usually) on a 5.5" wheels.
Anything is possible. 225 on 7" is not a problem and far from any limit in my opinion.
Look at it another way. 225mm is 8.85". You can look at the mounting width of a particualr tire, but if we assume that the mounting width is about equal to indicated tread width, the 7" wheel is still fine. Again as a rule of thumb is that any wheel that is within 2" of the mounded tire width is fine.
Anything is possible. 225 on 7" is not a problem and far from any limit in my opinion.
Look at it another way. 225mm is 8.85". You can look at the mounting width of a particualr tire, but if we assume that the mounting width is about equal to indicated tread width, the 7" wheel is still fine. Again as a rule of thumb is that any wheel that is within 2" of the mounded tire width is fine.
11-03-2007, 07:53 PM
#6
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As far a geometry cnange, the stiffer lower ratio sidewall and wider patch will more than compensate for it, especially in this case.
11-03-2007, 10:08 PM
#7
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Thread Starter
993James...the intent is simply a greater contact patch, since this is literally your only connection to the road. I heard somewhere that the CP for motorcycles when they are cornering is less that than of a quarter! Which explains why some cars can keep up with them (or not that far behind) in the twisties.
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11-08-2007, 02:46 AM
#9
Rennlist Member
Well.....
TOYO RA-1 235/45/17 and 275/40/17 works fine on my car...same tires on Chris Walrod's car...+ you can drive these tires to the track. With a hardness rating of 100, they don't pick up every little thing on the roar.
I have also seen Kumho 245s mounted on the 7" front wheels. They seem to fit, strange as it may seem..don't know the rear size.
I have also seen Kumho 245s mounted on the 7" front wheels. They seem to fit, strange as it may seem..don't know the rear size.
11-08-2007, 10:55 AM
#10
Every tire manufacturer specifies it's recommended wheel width for every tire it sells. Just look at the specs at the manufacturer's site. Tirerack also has these specs listed for most of the tires it sells.
for the sample tires I looked up, the recommended widths are as follow
for a 225/45x17 7 - 8.5
for a 225/50x16 6 - 8
for a 225/40x18 7.5 - 9
for the sample tires I looked up, the recommended widths are as follow
for a 225/45x17 7 - 8.5
for a 225/50x16 6 - 8
for a 225/40x18 7.5 - 9
11-08-2007, 11:54 AM
#11
Weathergirl
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Everything being equal, an oversize tire on a narrow rim will give relatively more grip and feel relatively worse on turn-in and in transitions.
A 225/45-17 sidewall is the same height as a 205/50-17 sidewall. So you're definitely not gaining the sort of shorter/stiffer sidewall benefit as you do by going from 17s to 18s.
An oversized tire on a narrow rim is very common in autocross where grip trumps all else.
On the street, a well-supported sidewall from a properly sized wheel makes an enormous difference in feel and turn-in, which you can appreciate EVERY time you turn the steering wheel.
The best example from my personal experience was on my old golf. I had 205/50 tires on 7.5" wheels. The feel was brilliant, steering was telepathic and I could tell exactly what the tire was doing. Later on as I was parting out the car, I installed the same tire on the stock 6.5" wheels. Then it was squirrelly, with indeterminate turn-in, and it was very hard to tell where the front end would bite or slide.
Good handling is not the same as ultimate traction!
A 225/45-17 sidewall is the same height as a 205/50-17 sidewall. So you're definitely not gaining the sort of shorter/stiffer sidewall benefit as you do by going from 17s to 18s.
An oversized tire on a narrow rim is very common in autocross where grip trumps all else.
On the street, a well-supported sidewall from a properly sized wheel makes an enormous difference in feel and turn-in, which you can appreciate EVERY time you turn the steering wheel.
The best example from my personal experience was on my old golf. I had 205/50 tires on 7.5" wheels. The feel was brilliant, steering was telepathic and I could tell exactly what the tire was doing. Later on as I was parting out the car, I installed the same tire on the stock 6.5" wheels. Then it was squirrelly, with indeterminate turn-in, and it was very hard to tell where the front end would bite or slide.
Good handling is not the same as ultimate traction!
06-21-2020, 07:53 PM
#12
Everything being equal, an oversize tire on a narrow rim will give relatively more grip and feel relatively worse on turn-in and in transitions.
A 225/45-17 sidewall is the same height as a 205/50-17 sidewall. So you're definitely not gaining the sort of shorter/stiffer sidewall benefit as you do by going from 17s to 18s.
An oversized tire on a narrow rim is very common in autocross where grip trumps all else.
A 225/45-17 sidewall is the same height as a 205/50-17 sidewall. So you're definitely not gaining the sort of shorter/stiffer sidewall benefit as you do by going from 17s to 18s.
An oversized tire on a narrow rim is very common in autocross where grip trumps all else.
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