Another dumb wheel tyre question!

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Originally Posted by RRT

Zero's the more vertical tyre wall would be the 8" I thought, as the wider 10" plus width of 10.43" would bulb out on the 7" more than the 8" - sure bulb out is a technical term used by RR as well as LR engineers. In my research to date, have not seen a 6.5 on either D1 or D2 but then I keep seeing new information all the time.

Gavin, would not LR when fitting the 8" which was definitely an option as shown on the tyre placard with 255 tyres, have themselves put the steering stops in appropriate position to allow for the extra width of tyre, this is where the original specs can show the turning circles for the 7" shod versus 8" being adjusted for the adjustment??? Again without the appropriate verification it is all just supposition I suppose. ohh ohhhhh oh to have the specification sheets!

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The sidewall width of the tyre will be wider with the 8" rim and narrower with the 7" rim. The narrow rims pull the sides of hte tyre in.

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Originally Posted by ballbag

RRT,

I have those P38 16x8 wheels on a D2 on Kings 2" springs.

Currently shod with Kuhmo MT51 265/75 tyres. They rub on the radius arms at full lock.

Vehicle is an auto and they want to run a little too fast down steep descents.

But I still like the tyre size. The ride is great.

If I had my time again I'd have gone for 7" D2 alloys.

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I have 285/75-16 on the same 16x8's and I get no rub with 1 washer behind the steering stops.

Well this is embarrassing ..... I didn't realise there was such a thing!

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Originally Posted by Slunnie

The sidewall width of the tyre will be wider with the 8" rim and narrower with the 7" rim. The narrow rims pull the sides of hte tyre in.

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Yes, effectively making the sidewalls on the narrower rim more vertical / less prone to puncture off road. Wider rims are designed for on road driving IMO.

This has made me even more confused than before, firstly after 30 + cars in my life, have never had a car speedo read over, always 3-5 (once 7) under the 100, back in the old days the overhead signs and for the last 10 years or so, gps.
The D2 has 235 70 16 tyres on the 8" rims but checking the speedo coming down the hume yesterday, 4 k's over according to the gps and the other car in convoy - the D1 now reads around that with 235 80 16 on the 7" rim.

Checking with the previous owner, the rims were purchased up round ALbury as a set about 15 years ago, it had steel rims on which one is one the vehicle now, leading me to believe even further the D2 was fully kitted out and returned to standard, this being the case then, the car was doing 85 kph at 2000 revs (gps) is this standard gearing? or do the tyres which are nearly 9" wide rise when on a larger rim!!!! ???

Ballbag noticed it on the D1, 1st low range was fine, 2nd just a bit too long with the 32" tyres, is this the case again with the auto or does it tend to run in auto 1? This being the case as it will be the car driven by the "others' with less experience, would the 245 75 16 be a safer option re retardation down steep slopes