How Wide Can You Go?

[T5R+]

S60 (2005 - 2007) is on 225/45 x 17" (7.5J rim).

Anyone gone to either

• 235/45 x 17
• 245/40 x 17

Either of these give me +/- 10mm overall diameter variance, so limited issue with speedometer.

Do not want to start rolling the arches or altering stops. Anyone gone to either of these sizes?

Will be on Comet or Oreste rims.
Note - may thus have a set of 8 x 18 Nebulas for sale.

[LeeT5]

S60 (2005 - 2007) is on 225/45 x 17" (7.5J rim).

Anyone gone to either

• 235/45 x 17
• 245/40 x 17

Either of these give me +/- 10mm overall diameter variance, so limited issue with speedometer.

Do not want to start rolling the arches or altering stops. Anyone gone to either of these sizes?

Will be on Comet or Oreste rims.
Note - may thus have a set of 8 x 18 Nebulas for sale.

I don't think the width profile makes any difference to the speedo, it's the 'Rolling circumference' ie the height profile that will screw your speedo reading unless your going up a rim size??. I think you will need to stick to a 45 profile. Better off speaking to someone in tyre trade. Someone here may be able to help thou?