16-03-15, 04:43 PM
BSAU159f states that no repairs are allowed in the sidewalls (these flex continuously and a repair is likely to fail), and the standard says repairs are not allowed on high speed Z-rated tyres.
that's why you have to keep your speed under 150mph because Z rated tyres are for speeds over 150mph
that's why you have to keep your speed under 150mph because Z rated tyres are for speeds over 150mph