Can I change tyre profile for more comfort?

[ConnectionError]

celica88 said:

Current ones are run flats

I can’t change the wheels from a budget POV

Change to non runlets of the same size.

Job done

[celica88]

That’s the plan but still rubber bands

[Tony1963]

ConnectionError said:

Change to non runlets of the same size.

Job done

Believe me, changing to non-runflats will make a big difference.

You say you can’t change rims from a budget pov, but quite often this can be done for little to no cost if you buy used and buy wisely, then advertise yours properly.

Perhaps there’s a PHer near you with a similar car on non-RFTs?

Edited by Tony1963 on Saturday 4th September 17:02

[celica88]

Well more time limited
Failed mot with cracked rims but I have spares from warranty. I’ll rather put non run flats on these than swap them over

[Tony1963]

celica88 said:

Well more time limited
Failed mot with cracked rims but I have spares from warranty. I’ll rather put non run flats on these than swap them over

So, try to find out, if it’s possible, which non-RFTs are the most forgiving. Don’t forget, you’ll need gloop/compressor or a spare wheel/tyre.

[Sticks.]

Tony1963 said:

So, try to find out, if it’s possible, which non-RFTs are the most forgiving. Don’t forget, you’ll need gloop/compressor or a spare wheel/tyre.

I think Goodyear F1 Asy's are known for having a better ride as well as good grip, in wet and dry. They were a big improvements on the RFTs and on every car I've put them on since.

[bennno]

celica88 said:

Current ones are run flats

I can’t change the wheels from a budget POV

I swapped my run flats for kumho non run flats and it was much better.

[celica88]

I can get Michelin pilot 4s for near similar money to eagle f1 assy 5 though

[Scrump]

From experience I can say that playing around with slight changes in width and profile but keeping approximately the same overall diameter on the same wheels will make almost imperceptible difference to ride comfort.
Different brand/range of tyre will potentially make far more of a difference.

If you really want to make an improvement then drop a inch or two in wheel diameter.

(I have no direct experience on RFT vs non RFT).

[voram]

AndySheff said:

You're going to have to drop the wheel diameter an inch or two.

Yes. I had a car with too firm a ride. Dropped the wheel diameter an inch and achieved enough improvement to avoid selling the car. £500 well spent.

Most cars will have a specifications section at the back of the driver's manual which tells you what wheel/tyre combinations are recommended. If you stick with something from that list it should be easy to avoid getting any insurance surcharge for "modifications".

[celica88]

Found a member who changed from 225/35/19 to 225/40/19

The extra side profile would absorb a lot more and no adverse affect to touching of trim at full lock

Although the speed when doing actually 72.46mph will read 70mph. So in the 30, 40,50,70 zones if doing the speedo speed will be going slightly slower and will help on speed traps lol

[Tony1963]

celica88 said:

Although the speed when doing actually 72.46mph will read 70mph. So in the 30, 40,50,70 zones if doing the speedo speed will be going slightly slower and will help on speed traps lol

If you weren’t aware, yes. Now? No way!

[Lincsls1]

Theoretically, going from the 35 to 40's AND changing from run flats, you might notice a slight difference in ride comfort and also reduce the possibility of more cracked rims! Slight being the word though.
IMO, the profile change being so minor shouldn't cause any clearances issues.

[Lincsls1]

celica88 said:

Although the speed when doing actually 72.46mph will read 70mph. So in the 30, 40,50,70 zones if doing the speedo speed will be going slightly slower and will help on speed traps lol

No, you need to keep your speedo 2/3mph under the actually speed limit to be doing the correct speed. Your speedo will under read as your first sentence stated.
It will not help with speed traps!

Edited by Lincsls1 on Sunday 5th September 12:20

[Sticks.]

celica88 said:

I can get Michelin pilot 4s for near similar money to eagle f1 assy 5 though

F1 Asy's will soften the ride more than MPS4, which is what you wanted isn't it?

[stevieturbo]

celica88 said:

Found a member who changed from 225/35/19 to 225/40/19

The extra side profile would absorb a lot more and no adverse affect to touching of trim at full lock

Although the speed when doing actually 72.46mph will read 70mph. So in the 30, 40,50,70 zones if doing the speedo speed will be going slightly slower and will help on speed traps lol

Larger circumference your speedo will read lower, incorrectly putting you more at risk of speed traps.

[stevieturbo]

Sticks. said:

F1 Asy's will soften the ride more than MPS4, which is what you wanted isn't it?

It would seem rather foolish buying any high performance tyre if stiff sidewalls are already a complaint.

[TedStriker]

stevieturbo said:

It would seem rather foolish buying any high performance tyre if stiff sidewalls are already a complaint.

You'd be surprised. The crashiest tyres I've ever driven on have tended to be budgets. MPS4 somehow manages excellent feedback/turn in without stiff sidewalls or a harsh ride.

[bennno]

Lincsls1 said:

Theoretically, going from the 35 to 40's AND changing from run flats, you might notice a slight difference in ride comfort and also reduce the possibility of more cracked rims! Slight being the word though.
IMO, the profile change being so minor shouldn't cause any clearances issues.

No theoretically about it, removing the run flats and fitting non run flats in the same size on my mini was noticeable.