Can I change tyre profile for more comfort?

Can I change tyre profile for more comfort?

Author
Discussion

celica88

Original Poster:

1,383 posts

207 months

Saturday 4th September 2021
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Currently on 225/35/19 and the profile are like rubber bands
Can I change to 235/35/19? This would give a bit more profile , but will the width be okay on 8” wheels?

Fusion777

2,466 posts

63 months

Saturday 4th September 2021
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I'd be surprised if you'd even notice a difference in comfort going between those two sizes.

AndySheff

6,764 posts

222 months

Saturday 4th September 2021
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You're going to have to drop the wheel diameter an inch or two.

Aunty Pasty

785 posts

53 months

Saturday 4th September 2021
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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.

QuattroDave

1,692 posts

143 months

Saturday 4th September 2021
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Agree, you won't really notice any difference in ride quality just by changing the width. Dropping to 18's you will though. Going to 225/40/18 will give you a lot more sidewall 90mm vs 78.75mm

celica88

Original Poster:

1,383 posts

207 months

Saturday 4th September 2021
quotequote all
Thanks. Scrap that idea

Changing alloys isn’t an option at the moment

How about 225/40/19

Changing the profile from 35 to 40?

celica88

Original Poster:

1,383 posts

207 months

Saturday 4th September 2021
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Aunty Pasty

785 posts

53 months

Saturday 4th September 2021
quotequote all
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.

raspy

2,042 posts

109 months

Saturday 4th September 2021
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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.

Pica-Pica

15,224 posts

99 months

Saturday 4th September 2021
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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.

Tony1963

5,690 posts

177 months

Saturday 4th September 2021
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Looking at those tiny brake discs, you can easily drop two inches in rim diameter. Maybe look on eBay for a set and also get an idea of what yours would fetch. You might be able to do it at no cost to you.

23.7

28,068 posts

198 months

Saturday 4th September 2021
quotequote all
I dropped from 18"s to 16"s it made a difference, less crashy on broken road surface.

If you're buying new tyres anyway, might as well go for a deeper profile, as long as they fit the arches etc it won't do any harm.

mmm-five

11,765 posts

299 months

Saturday 4th September 2021
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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'.

stevieturbo

17,776 posts

262 months

Saturday 4th September 2021
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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


Edited by stevieturbo on Saturday 4th September 12:43

TedStriker

301 posts

57 months

Saturday 4th September 2021
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I switched from Bridgestone runflats to Michelin Pilot sport non runflats on my F30 330d and it made a huge difference to the ride quality, road noise and general 'niceness' feeling. Having said that I'm sure it would feel even nicer on 16 inch wheels not 19...

mmm-five

11,765 posts

299 months

Saturday 4th September 2021
quotequote all
stevieturbo said:
Wheel arch clearance looks massive for such a skinny/low profile tyre ? Is it a 4wd vehicle or something ?
It's a Mini of some sort, CountryMan JCW perhaps.

Chris32345

2,136 posts

77 months

Saturday 4th September 2021
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AndySheff said:
You're going to have to drop the wheel diameter an inch or two.
This inch smaller wheels and taller tyres

celica88

Original Poster:

1,383 posts

207 months

Saturday 4th September 2021
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Car is a 2016 mini clubman cooper s with factory upgrade jcw oem spec 235/35/19

Tony1963

5,690 posts

177 months

Saturday 4th September 2021
quotequote all
celica88 said:
Car is a 2016 mini clubman cooper s with factory upgrade jcw oem spec 235/35/19
Ok. So why do you say you can’t change the rims?

And are the current tyres run flats?

celica88

Original Poster:

1,383 posts

207 months

Saturday 4th September 2021
quotequote all
Current ones are run flats

I can’t change the wheels from a budget POV