few questions

[womble sri]

my car will be going to the rolling road at the end of the month first time ive had it set up. my tires are quite bald on the front will this matter if so i have a spare set of 15's with good tread that i could put on. will this alter the readings in any way because they are smaller and heavier? im also looking at a 6 point cage will i have any trouble with an mot without my back seats in and will i have to change anything on the log book

[Philsutton]

If your tyres are bald then it wont be able to grip the rollers very well an will make things difficult i would imagine. The rollcage should be fine, take seats out, if they arent there they cant test them.