Cupping or scalloping of 'van tyres.

Thanks O P, I've changed the tyres and now will also change the shockers.

rr

A picture woul have been good to view, but would also change the bearing's ??

cheers
Redbacks

Red face Andrew ! Too soft to go outside in the cold and actually check the tyres which after looking just now I find aren't even BFGs (apologies to Mr G) They are Dunlop Adventurers 235/70 R16 s which I ran at 45 lbs. My van is twelve months old, 17'6" long, not a tandem ,the tyres and rims are original and have covered about 10,000 Ks and no, I haven't rotated the tyres. It trails perfectly and the bearings are good.

Last week I pulled the Dunlops off when I noticed the cupping and fitted a pair of 265/75 R16 Cooper tyres and rims (Sunraysia's) which came off my 'Cruise, I'll see how they go.

racinrob VKE-237 Sel 6678

another thing to remember is always balance wheels ,even on trailers an c/vans
a badly out of balance wheel will cause the wheel to bounce up an down on the
ground . the heaviest part will hit the gorund hardest .
cheers mechpete ,

Thanks Leigh, that's one thing I hadn't thought of, as the van is relatively new I took for granted the trailing arm bushes were in good condition, I will check them out.

rr

I agree. Some tyres, usually the lower quality variety with poor quality control during manufacture, sometimes just wear like that for no logical reason. Obviously you have to check all the mechanical reasons that have been suggested, and I wouldn't just replace the shockies, check them for oil leaks and test them first. You say the van weighs 1950kg which is nearly 1000kg per tyre or more if the van weighs more. Personally I would fit an 8 ply light truck tyres for that load as the construction of LT tyres means less flexing and you can pump them up 65PSI to prevent "bouncing". Not suggesting you ran at that pressure all the time if you don't need to but you can experiment with different pressure to find what suits best. Also car tyres are not rated to carry 100% load 100% of the time but LT tyres are.
The problem of scalloping also occurs on road trains and the problem is a bit like shoulder wear when your wheel alignment has been out of adjustment........once they wear like that you cannot stop it continuing so you have to find & correct the reason and then replace the tyres.