Can I change tyre profile for more comfort?
Discussion
You're not going to feel any difference. Even if the ratio value is very accurate, the difference would be only about 3 mm which is less than the difference between between a new and worn tyre.
To have any meaningful change you're going to have to change your alloys. Next size down would be 225/40/R18.
To have any meaningful change you're going to have to change your alloys. Next size down would be 225/40/R18.
If you're going to go for oversized wheels then you need to look out for what happens when you turn the steering wheel lock to lock. I once bought a lemon of a car and one of the many problems was that the wheels were larger than spec. It looked ok when I bought it but when turning, the wheel ended up rubbing the inside of the wheel arch at the back where you may put a mud flap.
AndySheff said:
You're going to have to drop the wheel diameter an inch or two.
Yes! I had a choice of getting a version of my car with 19 inch or 17 inch wheels. I chose the version with 17 inch wheels and a 2 inch drop in wheel size makes a huge difference to ride comfort, even with air suspension.Aunty Pasty said:
You're not going to feel any difference. Even if the ratio value is very accurate, the difference would be only about 3 mm which is less than the difference between between a new and worn tyre.
To have any meaningful change you're going to have to change your alloys. Next size down would be 225/40/R18.
This. You need to drop an inch or two to feel any difference.To have any meaningful change you're going to have to change your alloys. Next size down would be 225/40/R18.
If you're on runflats, then changing to non-runflats or to a brand with softer sidewalls may help more than changing the profile.
The problem of course is trying to find sidewall stiffness on any manufacturer's website, so you'd have to read some of the comparative tyre tests to see if they mention it directly, or indirectly when they mention a 'slower turn in' or 'slower initial bite'.
The problem of course is trying to find sidewall stiffness on any manufacturer's website, so you'd have to read some of the comparative tyre tests to see if they mention it directly, or indirectly when they mention a 'slower turn in' or 'slower initial bite'.
Even different tyre brands and types will make a difference. If you can get an all season or even winter tyre, they will be softer than a performance type tyre.
But 225 is already on the narrow side for an 8" rim, ideally you'd be into 235-245.
What size of tyres is the vehicle supposed to have ? presumably that is not standard size ?
But yes a 225/40 would have a larger sidewall than a 235/35
Wheel arch clearance looks massive for such a skinny/low profile tyre ? Is it a 4wd vehicle or something ?
And 225/40 will have no difference in sidewall at all for 18 and 19", as width and profile are identical.
But a drop to say 18" would allow say 225/45x18 to get a larger sidewall, although overall circumference will also be larger, but not massively so and still less than 225/50x19
But 225 is already on the narrow side for an 8" rim, ideally you'd be into 235-245.
What size of tyres is the vehicle supposed to have ? presumably that is not standard size ?
But yes a 225/40 would have a larger sidewall than a 235/35
Wheel arch clearance looks massive for such a skinny/low profile tyre ? Is it a 4wd vehicle or something ?
And 225/40 will have no difference in sidewall at all for 18 and 19", as width and profile are identical.
But a drop to say 18" would allow say 225/45x18 to get a larger sidewall, although overall circumference will also be larger, but not massively so and still less than 225/50x19
Edited by stevieturbo on Saturday 4th September 12:43
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