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 ·
“Losing 1kg of rotational weight (i.e. wheel weight) is the straightline performance equivalent to removing 10kg from your car”
Came across it earlier on a website.
3 facts about lightweight wheels according to Rota Wheels UK Managing Director Julian Pearcey:
I do know that the man selling the wheels, would obviously comment on the pro's of the product.
Maybe its one of the first changes we should be considering before we start pulling the car apart in the interest of saving weight?