On or around Thu, 10 Nov 2005 08:25:10 +0000, Dave Smith
<firstname.lastname@example.org> enlightened us thusly:
>Hi all, I have the stock 205/80R16's on my '92 D90. I would like to use
>my vehicle to a lot more greenlaning, to get to work safely in all
>winter conditions, and also to go on some of my own land. I have looked
>through the mags at tyres and it seems the BF Goodrich AT KO's are well
>recommended, so unless there's any sage advice to the contrary I've
>pretty much decided to get that make. However, what size should I get?
>My strictly non-expert instinct is wider is better for ultimate grip, so
>I've been eyeing up some 265/75R16's in one of the LRM ads. However, I
>still have several unknown questions to be answered :-
>a) Will 265/75R16 fit (height and width) without rubbing on my D90?
>b) Is there a good reason not to go for such a wide tyre?
>c) The tyre is 10% bigger than stock, and one (car) site recommended
>against over 2.5% bigger due to the brakes not coping. Is this true for
probably, depends, unlikely...
unless you do a lot of very soft ground then it's too wide, really, for most
off-roading. Anything much over about 235 is wide on a 90. On hardish
terrain you'll not gain any grip, and might even lose grip, due to reduced
ground pressure. Grip ain't all about width - I had 10.5 wide on my 110 and
have 7.50s on the SIII 109, and the latter performs better off-road - the
110 was lacking in grip on firm steep stuff, although it had a bit more
flotation on soft going, I suppose - on marginal ground it maybe wouldn't
have sunk where a narrower tyre would - however the range of terrain where
that'd be decisive is quite narrow, and the lack of grip on firm slippery
stuff was quite marked.
SWB series go very nicely on 7.50s, which are about the same width as a 205,
but taller. 235/85 are a good compromise for a SWB or a 90 - a bit wider
than standard, nice tall profile for better diff clearance, but not so wide
that you lose too much grip.
Austin Shackles. www.ddol-las.net
my opinions are just that
"For millions of years, mankind lived just like the animals. Then
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