[M340_Izzy]

I was wondering if I can run 265/40/19 in the rear and 245/40/19 in the front I have xdrive I wonder if it will have issues

[PLF69]

Originally Posted by M340_Izzy

I was wondering if I can run 265/40/19 in the rear and 245/40/19 in the front I have xdrive I wonder if it will have issues

Best is to keep the ratio difference withing 1%.

OEM is 0,4%

The size you are suggesting is 2,2%

235/40 F
265/35 R
is 0,4%

245/35
255/35
at 0.8% could work


245 or 255 Square could be a good option also.

[M340_Izzy]

Originally Posted by PLF69

Best is to keep the ratio difference withing 1%.

OEM is 0,4%

The size you are suggesting is 2,2%

235/40 F
265/35 R
is 0,4%

245/35
255/35
at 0.8% could work


245 or 255 Square could be a good option also.

Thank you so much very helpful. I just installed the setup I mentioned and the car feels weird definitely removing it

[GusL]

I agree, the difference in circumference is too big for an xdrive, it will put more pressure on the transfer case and cause premature wear.
If you wanted to keep a pair of the tyres you have bought you could go with:
Front - 245/40r19
Rear - 275/35r19 (if that will fit)
0.6% difference

Although something you should also keep in mind is how the change also impacts your speedo & odometer... assuming your OEM front tyres were 225/40r19 then changing to 245/40r19 would result in your speedo under-reading by 2.3% (unless you can adjust the on board computer)

[M340_Izzy]

Originally Posted by GusL

I agree, the difference in circumference is too big for an xdrive, it will put more pressure on the transfer case and cause premature wear.
If you wanted to keep a pair of the tyres you have bought you could go with:
Front - 245/40r19
Rear - 275/35r19 (if that will fit)
0.6% difference

Although something you should also keep in mind is how the change also impacts your speedo & odometer... assuming your OEM front tyres were 225/40r19 then changing to 245/40r19 would result in your speedo under-reading by 2.3% (unless you can adjust the on board computer)

Im going to try 275 in the rear see how the car rolls

[GusL]

Originally Posted by M340_Izzy

Im going to try 275 in the rear see how the car rolls

Might be worth double checking they'll fit on the standard rims (assuming that's what you have?) 8.5" I believe if you had 255 as standard.

[M340_Izzy]

Originally Posted by GusL

Might be worth double checking they'll fit on the standard rims (assuming that's what you have?) 8.5" I believe if you had 255 as standard.

Car runs phenomenal with the 275 35 19 thanks for the input

[GusL]

Great to hear 👍

[anselansel]

Originally Posted by M340_Izzy

Car runs phenomenal with the 275 35 19 thanks for the input

got any pics?