I always have trouble with tyre pressures for 110 CSW 1998 with 235 BFG. Does'nt seem to be anywhere to get a definative answer. However I did see a site where it showed a formula based on nthe tyres proprtties and the load of the vehicle that allowed youy to calciulate the correct pressure. Would anybody know of thos formula that I could use ?/
JoH
My old 110 had same size tyres & the book said rears should be 42 psi. That is way too high, I ran them at 32 front, 32 rear & it drove really well with no odd trye wear.
My P38 has 18 inch 255's & the fronts are supposed to be 28 & rears 38. 28 on the fronts is too soft. I have run them at 30 for ages with no odd wear.
Nige
On or around Mon, 3 Apr 2006 12:33:47 +0100, "Nige" enlightened us thusly:
The book says 28 for disco I fronts, and if you do that they wear on the edges, just like an underinflated tyre...
been running 36 in front and rear (except if heavily laden) for ages in discos and the tyres wear just about as even as you can get on steering-driving ones.
Nearly all the weight is on the front - unless you carry loads or are towing. If anything I would say the back needs be no more than the front on an unladen vehicle.
One old trick is to paint a white stripe across your tyres - you can then see where it wears off first - middle - over inflated - edges under inflated.
Austin Shackles came up with the following;:
Empirical data, I know, but I'd agree completely. 28 is under-inflated for most road-going situations. We drop to about 15/20 ish when off-roading and to about 26/28 ish for snowy/slushy weather, which seems to help a lot.
LOL, small world. I do exactly the same for everyday useage, 'cept when towing and heavily laden when I up the pressure to 40 ish at the rear and 38 ish at the front. As we tow most weekends through summer I'm forever getting the compressor out, and am toying with the idea of a plumbed in affair.
I run 31 x 105 BFG AT's though, which seem to work well at almost any pressure.
That formula based on max loading/pressure reduced in a linear fashion to your actual loading is a passable starting point but is inaccurate enough to be dangerous when used for a lightly laden vehicle.
My professional opinion (a number of years spent selling tyres) is 32 -
34 PSI front and 30 - 32 PSI rear unladen, going on up to 44+PSI rear when heavily laden.
Interestingly the Australian supplement for my 110 lists higher pressures than the English manual (same tyres), varying with both load and speed from
35/35 to 60/65 for loads over 1 tonne and speeds over 120kph. I find that I get best results using 35/35 lightly loaded, 40/55 fully loaded, speeds normally no more than 110kph. JDMotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.