Message Forums

I have just spoken to Elddis and found out that my van should have 165/s/r13 tyres

I currently has on it 165/80R13/83T and 165/86R/R13. what does the 80R and 86R mean and does it mean that they are odd?

Confused

Mark

look on here, download tech sheet

http://www.campingandcaravanningclub.co.uk/helpandadvice/technicalhelp/datasheets/

Not entirely sure of the markings these days, but I think they have different aspect ratios and different speed ratings.  Yes they are odd.

Jim

Quote: Originally posted by johnjory on 29/4/201080 is 'normal' anything less is generically termed 'low profile'

  As I understand it, in the old days of crossply tyres the height was the same as the width. The width/height ratio is called the aspect ratio. When radial tyres were introduced the normal ratio became 80%, ie the height was 80% of the width, except the 80 wasn't usually shown on the tyre, so the tyre would have, say 185-14 on it. Later on, late 60's ish this ratio started to reduce, mainly in the interests of better handling as shallower walls dont flex as much, and to give a larger footprint on the road without increasing the overall diameter. It started at 70% aspect ratio, eg 185/70/13 as fitted to the early 3ltr Ford Capri, and is now down to the elastic bands seen on some cars. Any tyre below the "normal" 80% was known as "low profile" and to many people still is. So yes 265/70/17 could be called low profile.

     Pete. 

look here

http://www.tyres-pneus-online.co.uk/load-and-speed-indexes-advice.html

http://www.tyresafe.org/data/files/caravan%20leaflet.pdf

Quote: Any tyre below the "normal" 80% was known as "low profile" and to many people still is.