tyres

[josh 109]

is their a limit to the size of tyre you can put on a series?

thanks josh :lol:

[Devon-Rover]

Short of them rubbing on the springs / chassis whilst turning, or then rubbing the wheel arches on full articulation. That is what limits size.  But then 7.50's will rub the arches on the back with para's / decent condition normal springs. 255's or similar on offset rims might catch the actual arch it self (the semi circle cut out bit)

VBR

[Miniman]

My SAG 7.50s catch on the rear arch when on full articulation and mine is on standard leafs.....But in my defence its got a brill rear suspension....

[Dave]

Has it got power steering fitted if not 235/85/16 would be the max i would fit so it still turned. I have seen bigger but must be very heavy steering.

[Miniman]

I will second that. I used to have 205/80/16 then I have gone to 7.50/16 this has made a BIG difference to my arms.... its well heavy now..

[22900013A]

750x16 or metric equivalent. If you have a military series with drop shackle suspension you could go up to 900x16 but you will need a lot of luck to find them for sale.

[jimthelandyman]

Don't forget that larger tyres will make the gearing higher and make it even more sluggish up hills if you have a 2.25 engine. i had some 225 wide tryes when i had my series 3 but can't remember the hieght of the sidewall these were slightly smaller than 7.50 r 16's but made going up hills more bearable.

[stratie]

I had extended shackles on my s111 with standerd springs, i ran 235x85x16's and later on i put 31x10.5x15's with no probs on the road.
Off road the 235's were great, the 31's  rubbed just a tad on the really rough stuff.

[CanIBeFrank]

(Firstly appologies for post hyjacking, although its on the same subject...)

Just before xmas I purchase and I'm currently rebuilding an 88 Series III  Diesel (rolling chasis at the mo), it has Range Rover diffs, goes very well on the flat or downhill, about 60. But was pants on any hill, down to 3rd on any moderate upward slope.

It curently has 750 R16's fitted, it's in need of new tyres, so would fitting 235/70R16 make any differance to the poor uphill peformance?

[Miniman]

I have rangie diffs and also had hankook rt01's 205/80/16s on it and it was brill on the road. Had it at 85mph under its own steam on the motorway. Hill not bad at all. I now have 7.50/16s on and its bad on hills.

[muddy_90]

i ve got 31x10.50x15 i was going to put 24" simex on it but i need to cut the archs big or fitted defender arches with the eye brows ons.

This topic came up on another forumhttp://forums.lr4x4.com/index.php?showtopic=177

[Rich_P]

(Firstly appologies for post hyjacking, although its on the same subject...)

Just before xmas I purchase and I'm currently rebuilding an 88 Series III  Diesel (rolling chasis at the mo), it has Range Rover diffs, goes very well on the flat or downhill, about 60. But was pants on any hill, down to 3rd on any moderate upward slope.

It curently has 750 R16's fitted, it's in need of new tyres, so would fitting 235/70R16 make any differance to the poor uphill peformance?

Yes, fitting 235/70 would make a differance.  The reason is because 235/70 has a smaller radius than 235/85 (similar to 7.50).  So it takes less to turn the smaller tyre round, but on the downside, your ride height will be lower and probably close to 205/80.

You will also need to recalibrate your speedo for the change in the tyre size.

(I'm hopeless today at remembering all the technical terms.  :roll: )

EDIT:  Forgot to mention.  If you have Range Rover diffs fitted, that alone would be causing a lot of trouble.  The 2.25 Diesel should pull fine on 7.50s or 235/85 uphill on standard gearing.

[CanIBeFrank]

Thanks for the advice, smaller wheels it is then as I aim to do most of my driving on road or green lane/farm tracks, I don't think the little lose in ground clearance will be a major issue. (I'll keep the original wheels and tyres)

ps got the bulkhead in and the engine running so far this weekend, things are looking up :)