Alloys (disappointed)

[Forty_Two]

The 18” alloys aren’t too bad in silver. Just had mine repainted and I think they look pretty good. I’ve since fitted the five point centre boss which improves it more. View attachment 732713

The 18" wheels are 'nice'

 

[MrT3]

The 18” alloys aren’t too bad in silver. Just had mine repainted and I think they look pretty good. I’ve since fitted the five point centre boss which improves it more.

Look goods on the pre 2021 models with chrome trim.

 

[kael13]

So can someone explain tyres to me a little bit here… are tyre widths dependent on the wheel? E.g 235 vs 245.
I’m thinking I will replace my 18” wheels in a couple years with some new rims, but I think I’d prefer wider tyres as well than the 235s it comes with.

 

[MrT3]

So can someone explain tyres to me a little bit here… are tyre widths dependent on the wheel? E.g 235 vs 245.
I’m thinking I will replace my 18” wheels in a couple years with some new rims, but I think I’d prefer wider tyres as well than the 235s it comes with.

The 18" rims are 8.5" wide so the optimum tyre width is 235 or 245. If you put on 225 then the walls of the tyre looks stretched and 255 would look squashed in - anything outside of 225 to 255 would be unsafe.

If you change the width then you need to consider the profile of the tyre so you keep the circumference of the tyre consistent, otherwise your speedo will go too far out of calibration.

There are plenty of tyre size calculators on the web which will help.

 

[Adopado]

The 18" rims are 8.5" wide so the optimum tyre width is 235 or 245. If you put on 225 then the walls of the tyre looks stretched and 255 would look squashed in - anything outside of 225 to 255 would be unsafe.

If you change the width then you need to consider the profile of the tyre so you keep the circumference of the tyre consistent, otherwise your speedo will go too far out of calibration.

There are plenty of tyre size calculators on the web which will help.

Presumably this will also alter the rolling resistance so range may be impacted negatively as the widths go up. I’ve no idea by how much.

 

[MrT3]

Presumably this will also alter the rolling resistance so range may be impacted negatively as the widths go up. I’ve no idea by how much.

Yes, and additional weight due to the extra width. Probably won't affect things too much though, say 5 miles on 100% range.

 

[Peter 224]

I have a set of wheels that fit the car, 225 18 on the front and 245 18s at the back.
Many AWD performance cars use wider rear tyres than the front.
Has anyone experience of doing this on a M3 AWD?