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 ·
at present i have a 300zxtt and want to insure a second car (just a cheap runabout so i can save some milage on the zed)
seen a 16 yr old rover 600 deisel very cheap had 1 before they do 50mpg its a nice old thing
been on comparison sites and insurance is rediculus £400 pounds plus as a second car
wtf is this so i have a f reg xr3i cabby in the garage and its only £79 for the year full comp
whats happened with insurance
can someone explain why this is so
btw my insurance for the zed is only £160 for me and a named driver with flux direct
why is it so dear to insure a second car?