Tyre upsizing to improve ride

P

PHAB

Junior Member
Messages
45
This may have been covered before but I am wondering on the effects of adding a bit more rubber to the 19" Gransport wheels. The ride is brittle at best and downright awful at worst...I know it's a sportscar etc etc and I should probably go and buy an S Class coupe if I want pillowy ride but I cant help but feel a fatter profile tyre is going to make an enormous difference to the ride quality. I know this could be achieved by going for a smaller wheel but wanted to see if anyone had tried a 40 profile rear and 35 profile front? Understand that the OD will no longer be the same which may throw off the speedo a touch . . . are there any other issues? Cannot foresee rubbing on a stock height setup as there is plenty of room. Perhaps I am dreaming that this may be possible . . . if I am dreaming, has anyone found a way to soften up the bone breaking (esp slow speed) ride on the 19s with a stock 265/30/19 rear and 235/35/19 front? On UK roads it's irksome.
 
Motorsport3

Motorsport3

Member
Messages
888
PHAB said:
This may have been covered before but I am wondering on the effects of adding a bit more rubber to the 19" Gransport wheels. The ride is brittle at best and downright awful at worst...I know it's a sportscar etc etc and I should probably go and buy an S Class coupe if I want pillowy ride but I cant help but feel a fatter profile tyre is going to make an enormous difference to the ride quality. I know this could be achieved by going for a smaller wheel but wanted to see if anyone had tried a 40 profile rear and 35 profile front? Understand that the OD will no longer be the same which may throw off the speedo a touch . . . are there any other issues? Cannot foresee rubbing on a stock height setup as there is plenty of room. Perhaps I am dreaming that this may be possible . . . if I am dreaming, has anyone found a way to soften up the bone breaking (esp slow speed) ride on the 19s with a stock 265/30/19 rear and 235/35/19 front? On UK roads it's irksome.
Click to expand...

What I have found is that adjusting to the right pressure and if over 4 years old then fresh rubber makes more difference than otherwise expected.
 
CatmanV2

CatmanV2

Member
Messages
48,836
Motorsport3 said:
What I have found is that adjusting to the right pressure and if over 4 years old then fresh rubber makes more difference than otherwise expected.
Click to expand...

I believe I started a thread along the lines of 'Performance car impacted by correct tyre pressures non shock' some years back ;)

C
 
Motorsport3

Motorsport3

Member
Messages
888
CatmanV2 said:
I believe I started a thread along the lines of 'Performance car impacted by correct tyre pressures non shock' some years back ;)

C
Click to expand...

I have a bicycle pump with a pressure gauge for correct measurement. I keep it in the boot and every now and then as temperatures fluctuate I adjust. It makes a small but noticeable difference.
 
GTVGEOFF

GTVGEOFF

Member
Messages
390
PHAB said:
This may have been covered before but I am wondering on the effects of adding a bit more rubber to the 19" Gransport wheels. The ride is brittle at best and downright awful at worst...I know it's a sportscar etc etc and I should probably go and buy an S Class coupe if I want pillowy ride but I cant help but feel a fatter profile tyre is going to make an enormous difference to the ride quality. I know this could be achieved by going for a smaller wheel but wanted to see if anyone had tried a 40 profile rear and 35 profile front? Understand that the OD will no longer be the same which may throw off the speedo a touch . . . are there any other issues? Cannot foresee rubbing on a stock height setup as there is plenty of room. Perhaps I am dreaming that this may be possible . . . if I am dreaming, has anyone found a way to soften up the bone breaking (esp slow speed) ride on the 19s with a stock 265/30/19 rear and 235/35/19 front? On UK roads it's irksome.
Click to expand...
Hi, If you go ahead with the higher profile tyres please post your thoughts on any improvement or detriment, as I am considering doing this myself.
 
BL330

BL330

Member
Messages
1,123
Like Mike, just go with the 18's. Should always have come with 18's. Here's mine until I can afford FD wheels ( same as Mike's) but in hyper silver or gold.

96545

If you have the coin, buy a set of Maserati Trofeo race wheels, they are 18".
96547
 
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