Cilonen
Member
Probably because Sotto 3s are available only in limited sizes.
Had a bugger of a job finding them for my BMW - but glad I did as they are a HUGE improvement over the 2s!
You should be able to find Sotto 3s in 245/45 18" easily, and these will be well within tolerance for the M3 wheels, so you may be better off ordering alloys & tyres from mytyres.co.uk, but do check with your insurer that they have no issues with the slight change in size from standard.
Had a bugger of a job finding them for my BMW - but glad I did as they are a HUGE improvement over the 2s!
You should be able to find Sotto 3s in 245/45 18" easily, and these will be well within tolerance for the M3 wheels, so you may be better off ordering alloys & tyres from mytyres.co.uk, but do check with your insurer that they have no issues with the slight change in size from standard.