Don't like low profile want bigger sidewall can I go with 17 inch rim and bigger sidewall

[matthew1]

URDRWHO, what was the tire you had on it?

[URDRWHO]

I should have researched this car before buying it. Personally at my age I don't need brakes that stop me quick after I was flying fast. All for braking power but ????? Then there is the low profile tires. That is the biggie. Roads are terrible and the dealer says they do a lot of work on cracked rims. I say low profile should be seen less of on cars but seems that I see more of them.

I guess replacing 4 calipers and discs would be possible but I just bought and paid some good money for the 235/45/18 tires. What they are saying makes no sense at all.

Although not of much help here, my neighbor has a 2015 V60 Polestar. The original owner spec's it for smaller brakes so he could fit smaller winter rims with taller sidewalls due to all the rough roads around here. The car is a 1/1 special order.

Neil.

[matthew1]

If the new tires don't work well in the long run, here's another idea: find someone with smaller brakes who wants to do a brake swap. Maybe there's money, maybe it's straight across even. Then do the smaller wheels thing.

[MoVolvos]

I should have researched this car before buying it. Personally at my age I don't need brakes that stop me quick after I was flying fast. All for braking power but ????? Then there is the low profile tires. That is the biggie. Roads are terrible and the dealer says they do a lot of work on cracked rims. I say low profile should be seen less of on cars but seems that I see more of them.

I guess replacing 4 calipers and discs would be possible but I just bought and paid some good money for the 235/45/18 tires. What they are saying makes no sense at all.

Although not of much help here, my neighbor has a 2015 V60 Polestar. The original owner spec's it for smaller brakes so he could fit smaller winter rims with taller sidewalls due to all the rough roads around here. The car is a 1/1 special order.

Neil.

.
The cars comes with a standard sized brakes and performance brakes depending on the package. The smaller rotor and potentially smaller caliper will clear the smaller wheels. Volvo happened to allow for customization if you order a car and the neighbor opted for the smaller / standard brake package for winter tires and wheels.
.

[scot850]

The neighbors cars original owner opted for the smaller brakes for that reason to run smaller steel rims with higher sidewall tires in winter.
He also had a custom color and other details on the car as well as the Polestar upgrade. Seems nuts when you reduced the brake size!

Neil.

[URDRWHO]

By the book the PSI is supposed to be 38 and you think I could go to 32 or 34? Maybe a bit softer ride and no I don't have a temp gun. I think my son has one. What temp thresholds should I be looking for?

I wouldn’t worry about the 0.1 difference. Even airing down to 34 or 32 psi you likely wont damage the tires. Can use an infrared temp gun to see if they are building too much heat.

[scot850]

Just watch out for the outer edges of the tires wearing at lower pressures.

Neil.

[Krons]

By the book the PSI is supposed to be 38 and you think I could go to 32 or 34? Maybe a bit softer ride and no I don't have a temp gun. I think my son has one. What temp thresholds should I be looking for?

I wouldn’t worry about the 0.1 difference. Even airing down to 34 or 32 psi you likely wont damage the tires. Can use an infrared temp gun to see if they are building too much heat.

If you are ok with potential uneven wear, yes you can run lower. Also be aware handling could be impacted and I’d avoid cornering aggressively. This article talks about tire temps: I’d start at 38, then check temp and ride characteristics as you drop pressure. I wouldn’t want them increasing more than 10°F of normal pressures.
https://flexymechanic.com/how-hot-do-ti ... e-driving/

[URDRWHO]

The previous tire was a 235/40/18

URDRWHO, what was the tire you had on it?