[luke1990]

Hi guys,

I have G30 540ix. I'm getting 19" wheels -> 19/8.5 ET 25 front and 19/10 ET41 back. I'm planning to go up from 245/275 and planned 255/295 (better grip - I run fairly big power). But some people told me to rather stick with 255/285s as its closer to 245/275 stock.

Now reason why I lean towards 255/295 is that they are 1mm closer in diameter (circumference). And being an xDrive I was told closer is better.

See here:
255/295s -> the backs are 1.25mm taller
255/285s -> the backs are 2.25mm smaller

This means 255/295 is closer in size than 255/285 by 1mm. However, it makes it also so that the backs are larger than fronts unlike stock xDrive where 245/275 on 19s have backs smaller by 1.75mm (here).

What do you guys recommend and why? THANKS A TON!

[rif75]

Not sure that you can fit 295 on the 9'' oem rims

[PetieD 7]

Originally Posted by luke1990

Hi guys,

I have G30 540ix. I'm getting 19" wheels -> 19/8.5 ET 25 front and 19/10 ET41 back. I'm planning to go up from 245/275 and planned 255/295 (better grip - I run fairly big power). But some people told me to rather stick with 255/285s as its closer to 245/275 stock.

Now reason why I lean towards 255/295 is that they are 1mm closer in diameter (circumference). And being an xDrive I was told closer is better.

See here:
255/295s -> the backs are 1.25mm taller
255/285s -> the backs are 2.25mm smaller

This means 255/295 is closer in size than 255/285 by 1mm. However, it makes it also so that the backs are larger than fronts unlike stock xDrive where 245/275 on 19s have backs smaller by 1.75mm (here).

What do you guys recommend and why? THANKS A TON!

My G30 (540i xDrive M Sport) came with OEM staggered wheels/tires in the sizes of (front) 245/35-20 and the (rear) 275/30-20. Recently, purchased a brand new set of wheels/tires with (front) 20x9 and the (rear) 20x10. I went with (front) 255/35-20 and the (rear) 285/30-20 for my new wheels/tires setup. Although, I was told (front) 245/35-20 would work as well....but. due to great deal on these 255/35-20 for the front, I decided to pull the lever.

[luke1990]

Originally Posted by rif75

Not sure that you can fit 295 on the 9'' oem rims

I'm pretty sure you can't . I'm fitting 255s on 8,5" and 295s on 10"

[luke1990]

Originally Posted by PetieD 7

My G30 (540i xDrive M Sport) came with OEM staggered wheels/tires in the sizes of (front) 245/35-20 and the (rear) 275/30-20. Recently, purchased a brand new set of wheels/tires with (front) 20x9 and the (rear) 20x10. I went with (front) 255/35-20 and the (rear) 285/30-20 for my new wheels/tires setup. Although, I was told (front) 245/35-20 would work as well....but. due to great deal on this 255/35-20 for the front, I decided to pull the lever.

Any reason you didnt go for 295s in the back? Would fit as well

[PetieD 7]

Originally Posted by luke1990

Any reason you didnt go for 295s in the back? Would fit as well

Various wheels/tires specialists and companies highly recommended the rear 285/30-20 fitment due to xDrive system, and the width of my new aftermarket (rear 20x10) wheels. However, I know for a fact that some G30 (non xDrive) owners out there are using 295/35-20 though.

[luke1990]

Originally Posted by PetieD 7

Various wheels/tires specialists and companies highly recommended the rear 285/30-20 fitment due to xDrive system, and the width of my new aftermarket (rear 20x10) wheels. However, I know for a fact that some G30 (non xDrive) owners out there are using 295/35-20 though.

I see - I'm trying to figure out if they recommend this purely because 30 is a gap stock BMWs roll with - e.g. 245/275s or because its closest in size. E.g. 245/275 19s the backs are smaller by 1.75mm and if you put 245/285 the back would be bigger by 1.75mm so technically its a toss - unless xdrive prefers smaller backs?

On 255/285s 19s however backs are smaller by 2.25mm whilst 255/295 backs are bigger by 1.25mm so its 1mm closer hence why unless xdrive likes smaller backs, this should be better Im thinking

[Madmachinist]

The M5 xdrive tire sizes seem pretty conservative with a 285 rear. I'm assuming there is a reason for that