Thread: can anyone explain?

Metric and Imperial sizes thats all

Originally Posted by lokka

Metric and Imperial sizes thats all

but i'm assuming 32/10.5 means the tyres are 32? or is that not right

coz as far as I was aware 255/70's equate to some thing like 30.1

Aren't they a remould?

Might be a 32x10.5 carcass they used?

but how can you make a 30" tyre on a 32" carcus?

and why would they write it on the tyre it's self

The metric and imperial sizes, as you point out, do not agree. What the actual size is, would seem to be a matter for conjecture, but presumably something the manufacturer decided they could sell to both metric and imperial markets.

Tyre manufacturers have never been particularly truthful in their tyre sizes - for example, a couple of years ago I had to replace a rear tyre on my tractor - the only readily available tyre was five inches different in diameter to the ones fitted, so I ended up having to get two (but sold the good one second hand to someone who had the same problem).

John

Remould, recap, retread, call it what you like, it will never change the tyre size. the two stated sizes, as previously mentioned, are metric & imperial.

To me your tyres look more like 32s anyway

Originally Posted by V8Ian

Remould, recap, retread, call it what you like, it will never change the tyre size. the two stated sizes, as previously mentioned, are metric & imperial.

Yes - but 255mm = 10.04" not 10.5,
and 255mmx0.7x2 + 16" = 30.06" not 32.

or putting it the other way,

10.5" = 267mm not 255mm
and (32" - 16")/2 = 8" = 203mm = 76% of 267 or 79% of 255, not 70% of anything.

there is no way to make 32 x 10.5 the same as 255/70 - 16

John