Tyres

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ER1C

ER1C

Well-Known Member
Posts
5,366
Location
Cheshire
In need of advice... To cut a very long story short.. We have Defender 110 with original Steel rims 750 x 16 .... its a 92 so rear drum brakes.

Righty we need new tyres.....

1. Get new tyres for rims... these are expensive and there is very little range in terms of off road tyres.... future outlook is bleak

2. Get new rims.... most new rims seem to NOT be suitable for DRUM brakes. :( .. they can machine down but this would be a modification ?

Can someone suggest another option ? I have seen all kinds of options... I dont want a chav looking wheel...
 
ER1C said:
In need of advice... To cut a very long story short.. We have Defender 110 with original Steel rims 750 x 16 .... its a 92 so rear drum brakes.

Righty we need new tyres.....

1. Get new tyres for rims... these are expensive and there is very little range in terms of off road tyres.... future outlook is bleak

2. Get new rims.... most new rims seem to NOT be suitable for DRUM brakes. :( .. they can machine down but this would be a modification ?

Can someone suggest another option ? I have seen all kinds of options... I dont want a chav looking wheel...
Click to expand...

your looking in the wrong places then,off road tyres are readily available and theres a huge range
 
Do you care for a few links... 7.50 * 16... many have said I can get them but so far ALL have said... ummmmmm let me get back to you and few have...
 
Yup.. you are wrong... its CLOSE but the metric/imperial difference makes it an unadvisable risky fit..... although lots have done it..... I wouldnt.
 
you can get whatever tyre size you like... almost.

265/75/r16 is popular on standard defenders. 235's as above are a good choice. I have run 31/10.5/r15 but these are a little small. If you stick to 750s you are limiting your tread pattern choices. Buy a set of tyres already fitted to modular rims and flog yours as a fitted set.

G
 
ER1C said:
Yup.. you are wrong... its CLOSE but the metric/imperial difference makes it an unadvisable risky fit..... although lots have done it..... I wouldnt.
Click to expand...

That is bollocks! How on earth is it "Risky"..... I know the steels have 7.50's on a standard but i wonder what alloys have on as standard..... :rolleyes:
 
Whoa easy fellas :) Its nothing to do with the size of 7.50 tyre .. its the the simple fact 7.50 Steel Rim is not the same size as 235 tyre... the same as how no metric spanner will fit an imperial nut exactly......

Now I am no tyre fitter but umpteen have told me its not a safe fit.... They may be talking "bollocks" but such is their view... and as i said on forums others have done it but is it a wise choice when tyre fitters advise against it....

Here is a useful link which covers some of this

http://forum.landrovernet.com/archive/index.php/t-135168.html
 
Last edited:
Utter Bollocks.
There is a fitment range on the rim size you are using which allows for variables like different aspect ratios, temperature, flexing and type/purpose of tyre.

Metric/Imperial : You are talking in your case a difference that is negligible, if the tyre will bead on correctly and is sound then it will probably be ok. Think about the range of flexing the sidewalls go through when driving then marvel how normal car tyres dont fall off the rim!

Check out this website for all your tyre/wheel sizing needs, rim, width calculators, dos and donts, its been very handy to me over the years and maybe it will help you out too. In particular the rim calculator will be ideal for alternative tyre sizes for your rims, theres loads!

Car Bibles : The Wheel and Tyre Bible Page 1 of 2

regards
 
Last edited:
ER1C said:
Whoa easy fellas :) Its nothing to do with the size of 7.50 tyre .. its the the simple fact 7.50 Steel Rim is not the same size as 235 tyre... the same as how no metric spanner will fit an imperial nut exactly......

Now I am no tyre fitter but umpteen have told me its not a safe fit.... They may be talking "bollocks" but such is their view... and as i said on forums others have done it but is it a wise choice when tyre fitters advise against it....

Here is a useful link which covers some of this

Metric tyres [Archive] - Land Rover UK Forums
Click to expand...


As an ex-fitter...... My motor came to me with 235s on, I switched them for 7.5" and ran until the old bus fell apart. No problems at all, despite the fact this is the "worst" way round to do it, 235s on 750 rims is far safer option

7.5" is the the normal inflated width of the tire, this actually equates to a metric tyre of about 190. However to get the correct rolling radius a 190 would have to be just ast tall as the 7.5s.

Putting a 235 tire on a 750rim, will result in a tight fit. far better than the reverse. Original disco/rrc rims take both a 205 and a 235 tire when they came out the factory.

Stamped on the original wheels should be something like 7Jx16. the first number is the width of the rim, from this figure suitably safe tire sizes can be suggested.
 
Thanks fellas, I began to think I was losing the plot as it was turning impossible to get a set....... and I was thinking.. how the hell does everyone else do it... :)

Can I put tubeless on there as well ? Despite kwik fit saying its a tubed rim ?
 
If its a tubed rim, you will need tubes to keep the air in, or to find some other way of making sure the rim is airtight, possibly including hunting down some specialist valve stems. From experience, tubeless tyres will often wear through tubes as they flex, but that could just be because I used to really push the boundaries.
 
yeh tubless tyres with tubes is a bloddy pain in my experience. about a puncture every month with 80% road use because of it. thats with 265/75/16 bfg mt's on the original steel rims your on about.
 
or get yourself a set of these rims

Image336.jpg


which will go on to drums rear, and are stronger than alloys.

Then you can fit up to 265 on safely

ive been told by tyre fitters that 235 is jus about over the max size for a std landy rim, which btw is 5.5 inches wide
 
boydy1989 said:
or get yourself a set of these rims

Image336.jpg


which will go on to drums rear, and are stronger than alloys.

Then you can fit up to 265 on safely

ive been told by tyre fitters that 235 is jus about over the max size for a std landy rim, which btw is 5.5 inches wide
Click to expand...

Nice 3. :)

Anyway someone has finally mentioned J size.

A 235/85/16 is no more metric than a 7.50/16 - the 16 being the clue.

It is of course 2 inches wider and half an inch (radius) taller.

Width being the "safety" issue I imagine.
 
yes, 235's are wider. I was told by the fitter this, pretty much:

'you can fit them, they look ok and will stay on. However, its not recommended 'cos they could, in an extreme situation, come off easier than they should, i.e. in a crash. In this situation the insurance assessor WILL be looking for ANY reason whatsoever to escape paying - incompatible tyres is an easy one.'

So i got those nice wellat 8 spokes in exchange for a computer fix (ask landowner :D) and put my 235's on them, cos they are an inch wider, being 6.5J.

for completeness:

750x16 = 7.5 inches wide, 7.5 inches high, 16 inch 'hole' in the middle, cross ply.
750R16 = 7.5 inches wide, 7.5 inches high, 16 inch 'hole', radial

235/85R16 235mm wide, 202.3mm high (85% of 235) 16 inch hole, Radial.

(unless ive remembered imperial width/height ratio wrong :D)
 
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