Strange tyre wear - please help

Thanks Lang
It will sure be interesting to investigate this further.
A mate of mine just had his front springs done in his bus and it wasn't any where as much as I would have expected.
Cheers
Ash

A couple of weeks ago I noticed my float had wire appearing out of one tyre

I know the axles need some alignment works as the float doesnt track properly behind the primemover, anyway that job is on the things to do list as I dont do big miles normally and it isnt used every day, week or month I have just sort of left it

Upon investigation I noticed that the tyer was the only ones worm on the axle and was only badly worn on one spot





I find this pretty strange and cant quite understand why, I would of thought it should be worn the same all the way around

Even if it wasnt sitting on the spider correctly, this is the inside duel so I figure if the outside tracks true and the spacer isnt squashed it should be pretty good

Both of these things are okay

So this thread came to mind when I saw the brand



So some useless information but might add some credence to the brand thing

I have been just updating with tubless over the last few years on the float and they are fine

I never had a good run out of these from the day I put them on the float, closed the freeway north of Brisbane one day on their maiden voyage, smoke everywhere with two blowouts on the same axle and some over zealous transport people, I was on the shoulder waiting for the smoke to clear lol

Similar deal coming gome from Adelaide one night

All the same brand, I have as I have already mentioned started changing over to tubless and no problems at all with tubless

Paul

A slightly out of round brake drum can cause that "progressive" type wear as opposed to a locked brake flat spotting. Maybe the set up is not affecting the other tyre or they are two slightly different heights caused by tread, make, construction or pressures making that worn one carry more load.

Just a WAG.

Lang

Rubber could have degraded by sitting on oily soil or something?

My best guess is an impact fracture and it has separated causing it to bulge and wear in that spot.

Paul, I reckon the old Tyre Fitter cobba may be onto something..!
The other thing I'd do is jack that wheel up a Bees dick off the ground & spin It to see if It's out of round. Also a good fast(ish) spin & listen for a rumbly Wheel bearing.& see if It comes a dead Stop or rolls Back a bit which would indicate a Balance problem...

Mrs m80
Th@ tyre is not flat across the tread
could mean a belt has let go under the tread
also wheel bearings & adjustment can do funny wear pattern
also when the tyre was assembled if the bead is a tight fit on rim it can create heta and cause drama
I had 12 new Pirelli float tyres fitted
1st trip on the way up past Albury blew 2 tyres
Mr Pirelli said musta bin the tyre fitters fault
me ol man told him to go n not cum back
he had been fittin all our tyres since way back when
LOL
cya

Dunno, not really fussed about it but Cobba I dunno about impact but the tyre seperating isnt uncommon and I would never of felt this up in the cab driving along as it was the back axle

No matter the reason it will be going into the, in case of emergency pile lol

Just thought it sort of related to this thread when people were talking tyre brands and tubed versus tubeless

The back axle on these walkimg beam unsprung tri axle trailers cops a flogging and as a general rule they will blow out more often than the other axles (my experience only)

And of course these little tyres are spinning so fast with all of that unbridled horse powet of my Mrs Mack up the front :silly: :silly: :silly: :silly:


Yep Swishman I reckon your right about the belt


Paul

Hi Lang.
You’re spot on mate.
I had the kingpins machined round and new bushes made. Small changes to shims and the front end feels a tight as new.
While standing there admiring our handy work I grabbed a tape measure and sure enough the ‘long side’ is sitting 20mm lower in the arse end. It seems the springs have sagged which as you suggest could easily account for back end shifting 5mm back. Funnily enough the rear shackle doesn’t seem to be leaning back.
Thinking maybe put a 20mm block in it and offset the centre bolt hole 5mm to kick the axle forward.

Does this have brass or rubber bushes in the springs and shackles ?

Rubber and deform quite aways and not be noticeable
Even brass or bronze cab be pretty worn yet look okay

May wanna look into those and see whats what before making changes, or at least I would do something along those lines

Paul