Thread: tyre pressures with bull bar

My local tyre guy did some measurements on my Kuhmo Solus and said they need to run up around 40 on my D3. Can't say how much of a difference it has made as they were pretty rooted when I bought the car but I haven't seen any extra significant wear. The fears have scalloped inner shoulders due to a bad alignment though.

Nic, I own a 2011 D4HSE and it was fitted with an ARB steel bull bar in 2012.
I have never changed the tyre pressures based upon the bull bars additional mass. In fact I never even considered it. I do adjust pressures for differing travel conditions or load but pretty much for normal driving stick with the placarded pressures. I have had Continental tyres, Cooper tyres, Pirelli Tyres and of recent times Hankook tyres (last two sets) and not had any issues or problems as you have described.

This could be worth a read.

Front Tires Wear on Outside Edge: Causes and Solutions - Tire Reviews, Buying Guide & Interesting Facts - Utires.com

I thought under pressure wore both inside and outside edges. Over pressure wore the centre of the tyre while just inside or outside was a wheel alignment issue.

Originally Posted by SeanC

I thought under pressure wore both inside and outside edges. Over pressure wore the centre of the tyre while just inside or outside was a wheel alignment issue.

Correct.

Mine has a bar,and KO2's,i run 40 PSI on black top, no worries at all,and the last set did over 60K and wore evenly.

Mine has a bar,

Does it also have Refrigerated Keg Storage? It never ceases to amaze me what can be fitted into a LAND ROVER.

Thanks for the replies. In my initial post I meant to say that the front tyres are wearing on both shoulders or edges - so under inflation. I've pumped them to 39 and will see how they go.

Nic

Originally Posted by newby@54

I own a MY16.5 Disco 4 fitted with an ARB steel bull bar..... So when LR specify 34 psi front (and presumably this is a 'cold' temperature)

34 and 37 seems too low to me, and yes, that would be cold pressures. Allowing for ~3psi increase when hot, 37 and 40 respectively still seems low for a car running 19" rims and weighing 2.7t. The wear you are describing is definitely from under inflation. Would have been a plush ride though.

I run my current set of LT 980's at 46psi cold on the highways and byways a nbd they are wearing evenly. The previous set of Cooper Zeons the same and got 70,000kms out of them with even wear all round.

I've also got an ARB steel deluxe bull bar, but honestly have never considered the additional weight of the bar in setting tyre pressures. I just set to what I'm comfortable with ride wise and ensures even wear.
Cheers