hawkplasterer · Apr 12, 2011

Hi, I've got a set of Mastercraft Courser MT 285/75/r16 on my Landy 90 (no lift and always unladen) and I've had them on for 18 months now and still pretty good but i want to swap the front and rears around for tread reasons. Does anyone know the tyre pressures I should have as I've forgotten what I was told when I brought them and like an idiot didn't write it down. I want to re-check the pressures once swapped to make sure they are all still ok. Also I seem to remember being told to torque the studs up to 140nm??? The tyres are on the standard steel rims they came on. Does this sound right or is my memory of that wrong. Thanks in antisipation, Mark.

Station House · Apr 12, 2011

Loads of threads on this one and even more opinions!

Try 35 rear and 28 front (others will advise differently).

But if you want to get them right for your Landy and its load, you need to give the good old chalk test a try - to save you searching...

- Find a nice piece of smooth, level tarmac
- Draw some broad chalk lines across the tread surface of your tyres
- Drive forward about 100 foot (straight line) then look at the chalk marks
- If they've worn away more in the middle of the tyre than on the outside the pressure is too high
- If they've worn away more on the outside than in the middle the pressure is too low
- If they've worn away evenly over the width of the tyre your pressure is spot on

Andy Land · Apr 12, 2011

Station House said:
Loads of threads on this one and even more opinions!

Try 35 rear and 28 front (others will advise differently).

But if you want to get them right for your Landy and its load, you need to give the good old chalk test a try - to save you searching...

- Find a nice piece of smooth, level tarmac
- Draw some broad chalk lines across the tread surface of your tyres
- Drive forward about 100 foot (straight line) then look at the chalk marks
- If they've worn away more in the middle of the tyre than on the outside the pressure is too high
- If they've worn away more on the outside than in the middle the pressure is too low
- If they've worn away evenly over the width of the tyre your pressure is spot on

The good old chalk test SH ... doesn't work so well for teenagers though as the chalk wears off completely as the wheels spin

hawkplasterer · Apr 12, 2011

Thanks for that. If my memory serves me right (a BIG if!) that rings a bell from what I was originally told. I'll go for those pressures for now and if/when I find a flat piece of road around here do the "chalk test". Do you think 140nm for the studs sounds right? Thanks again, Mark. Certainly don't need to worry about any wheel spinning in my 90 though!

Station House · Apr 12, 2011

Anytime Mark

re: Wheel Nuts - I don't know the official torque off the top of my head, but if running the original steel wheels (as I am), doing them up really tight isn't an issue - they won't damage in the same way that an alloy wheel might

Possibly not the 'right' advice, but I do mine up tight using an air impact socket wrench - they haven't fallen off yet!

hawkplasterer · Apr 12, 2011

Thanks again. Out i go to swap these wheels then!

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