Might be stating the obvious (to some) but something I didn't realise until I started trying to pick tyres for aftermarket wheels is that the profile figure - e.g. 40 - is 40% of the width.
So for a 255/40/17 tyre - diameter is 255mm, profile / side wall is 102mm (40% of 255), and radius is 17inches.
Learning this made it all make a lot more sense to me. I also have this graphic to refer to. Can't recall where I found it but it's now saved on my desktop!
I also wanted a chunky looking tyre with a solid side wall and after going 245(F) / 265 (R) , have since switched back to 235(F) / 255 (R) as I found the handling was noticeable more boggy and I use the car for fast road and track use. For ref, these tyres are on 18" BBS LMs.
By
sumshiftyguy ·
My Speedo is displaying MPH but seems to be reading KMH. Could this be down to some sort of sender relay
The fuel cap is not opening from the lever......Now sorted
And the boot release is working but the lever has to be held up at the same time as lifting the boot
And lastly I need the following repaired. Anyone know if it's much of a job.
And the cigarette lighter is not working (Bummer for the sat nav) Scratch that one now fixed
Cheers
Edited by Tango450