Tyre profile question
04-09-2015, 08:14 AM
#1
Member
Thread Starter
Tyre profile question
I am curious as to whether I can fit 255/35/19 as opposed to 255/30/19 on the back of my car.
A few people say it helps with rim protection and gives a somewhat softer ride.
Is there any truth in this ?
If so I see it as a win / win situation because the 255/35/19's are £60 less per tyre than the 30 profiles.
N.B why is the search facility so shockingly bad. I get better answers googling a question and getting a MBworld answer than I get from a direct search inside the site !!
A few people say it helps with rim protection and gives a somewhat softer ride.
Is there any truth in this ?
If so I see it as a win / win situation because the 255/35/19's are £60 less per tyre than the 30 profiles.
N.B why is the search facility so shockingly bad. I get better answers googling a question and getting a MBworld answer than I get from a direct search inside the site !!
Last edited by -ian; 04-09-2015 at 08:16 AM.
04-10-2015, 01:37 PM
#2
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W204 C63 Coupe, W166 ML350 BlueTEC, 928GT, C5 Z06 & IS300 race cars, EQE 4Matic+ on order
I am curious as to whether I can fit 255/35/19 as opposed to 255/30/19 on the back of my car.
A few people say it helps with rim protection and gives a somewhat softer ride.
Is there any truth in this ?
If so I see it as a win / win situation because the 255/35/19's are £60 less per tyre than the 30 profiles.
N.B why is the search facility so shockingly bad. I get better answers googling a question and getting a MBworld answer than I get from a direct search inside the site !!
A few people say it helps with rim protection and gives a somewhat softer ride.
Is there any truth in this ?
If so I see it as a win / win situation because the 255/35/19's are £60 less per tyre than the 30 profiles.
N.B why is the search facility so shockingly bad. I get better answers googling a question and getting a MBworld answer than I get from a direct search inside the site !!
I would suggest you look into getting a set of 18s instead. The ride is noticeably better not only because you will get the extra 12 mm of air beween the road and the rim but also because they are designed to be run at ~ 4 psi lower pressures than the equivalent 19s, and the car will both look and perform as designed (and yes, 18" tires of the appropriate 235/40-18 F and 255/35-18 R sizes are cheaper too, but you will have to dish out for the rims first).
04-10-2015, 01:45 PM
#3
Member
Thread Starter
All other things being equal, you are increaisng the sidewall height from 30% of 255mm to 35% of 255mm, so the overall wheel diameter is going to change from 637mm to 661mm. Your wheels with the new tires are going to be 1" larger in diameter than with the old ones, and in addition to any possible clearance (rubbing) issues you're also going to introuduce a 3.8% speedo error (it will read slower - when it indicates 60 mph you'll actually be doing 62.3 mph). Sure, it will give you a somewhat softer ride as there is now more air between the tire and the rim to absorb and cushion road imperfections, but your car will also look like a C63 Tonka toy and handle like an SUV. A 1" taller wheel and an almost 4% speedo difference is certainly not insignificant on a sports car.
I would suggest you look into getting a set of 18s instead. The ride is noticeably better not only because you will get the extra 12 mm of air beween the road and the rim but also because they are designed to be run at ~ 4 psi lower pressures than the equivalent 19s, and the car will both look and perform as designed (and yes, 18" tires of the appropriate 235/40-18 F and 255/35-18 R sizes are cheaper too, but you will have to dish out for the rims first).
I would suggest you look into getting a set of 18s instead. The ride is noticeably better not only because you will get the extra 12 mm of air beween the road and the rim but also because they are designed to be run at ~ 4 psi lower pressures than the equivalent 19s, and the car will both look and perform as designed (and yes, 18" tires of the appropriate 235/40-18 F and 255/35-18 R sizes are cheaper too, but you will have to dish out for the rims first).
