tyres

In news:boaesj$cv0$ snipped-for-privacy@hercules.btinternet.com, teddave wrote: | can someone tell me what the 750 - 16 on my tyre refers to. | | i can take a stab at teh 'made in morocco' bit | | tks t

750 = 7 1/2 inch tread width

16 = 16 inch wheel rim.

Mark

On or around Wed, 05 Nov 2003 11:57:19 GMT, "Mark Pewsey" enlightened us thusly:

(Nominal) - in other words, it may be anything between 7 and 8... :-)

and in the case of cross-plies, 7.5" tyre height. same applies to radials marked 7.50R16, which are a non-standard size made to equate to the 7.50 crossplies. Nominal diameter is thus 16+(2*7.5)" (2*7.5=15, 15+16=31")

"normal" radial tyres (in this country) would be marked something such as

205R16, 235/70R16, 235/85R16, 265/75R16.

in the case of 205R16, this is 205mm nominal width and fits on a 16" rim, and is of "standard" height, which IIRC is 80% of the nominal size, so in this case the nominal diameter is 16+(2*.82*205/25.4)" which works out at

16+13 (roughly) or 29" - about the same as the old 6.50x16 tyres.

235/70 etc refers to a low profile tyre: the nominal height is 70% of the nominal size, in this case, 164.5 which is about the same as the 205 above. The 235/85 is a "high profile" tyre if you like, which is 85% height, and is in fact slightly larger than the old 7.50 size.

American tyres are often listed as for example 31-10.50R15 - in this case, the 31 is the nominal diameter, the 10.50 is the nominal width (both in inches) and the 15 is the wheel diameter. So this tyre is the same nominal diameter as the 750x16, but is 10.5" wide and fits on a 15" rim. I dare say there are ones that fit other rims - and also other sizes - really big ones are 33-12.50 for example.

Finally, in France and some other places, they have metric wheel rims (on cars, mostly - some of the mini metros had 'em too) leading to tyre sizes like 160/70R315, say. I don't think these are fitted to 4x4s, though.

Tyres without a profile number are 82%, not 80%. 80% profile tyres would be marked 205/80R16

Alex

On or around Wed, 05 Nov 2003 22:49:08 +0000, Alex enlightened us thusly:

close enough for jazz... but now you mention it, I do believe I recall hearing that. But I also suspect that it started off at 80. 2%0f 200-ish mm isn't much though.

so what do the yank specs equate to in english,

my toymoto had some thing like 10R15LT109 fitted as standard.

ive seen a jeep mag a mate fetched back from the states the other week and some of the tyres in their had to be sen to be believed, something like 4 foot tall. surely i can squeeze them under my series.............

andy

_______________________________________________________________________________ Posted Via Uncensored-News.Com - Accounts Starting At $6.95 -

The Worlds Uncensored News Source

On or around 9 Nov 2003 17:31:09 GMT, Andy enlightened us thusly:

's in my earlier message, but in case that's not visible somehow...

such things as 31x10.50R15 are 31" nominal diameter, i.e. the same nominal diameter ar 7.50x16 or 7.50R16, which should fit except that some of the wheels sit sufficiently outboard that you might need wheelarch extensions. The ones I have on the 110 come right to the edge of the eyebrows, so although they're probably legal, and I remounted the mudflaps an inch or so further out, there's still scope for it throwing convincing amounts of mud all over the sides of the vehicle... I keep meaning to rivet a little extra bit on the bottom of the front wheel arch behind the eyebrow to deflect this

- not worried about it looking "more convincing"[1] but after a bit it gets difficult to see out of the side windows...

[1] Old LRs shouldn't be clean...