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Strange tyre wear - please help 20 Mar 2022 15:55 #233218

  • ashmenz0
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Hi
My old Denning bus is wearing tyres out in a strange way. Passenger side is scrubbing the outside away very quickly and the drivers side is doing the same on the inside.
Any thoughts on what would cause this and how to rectify it?
Thanks
Ash

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Last edit: by hayseed.

Strange tyre wear - please help 20 Mar 2022 16:10 #233219

  • Swishy
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Check distance from front wheel to rear wheel compare both sides of bus
also check toe in
Zero '0' to 1/16th inch toe in may B OK
cya
OF ALL THE THINGS EYE MISS ................. EYE MISS MY MIND THE MOST

There's more WORTH in KENWORTH
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Strange tyre wear - please help 20 Mar 2022 17:11 #233224

  • hayseed
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I second what Swishy Said.. Check your Toe in..
I'd also get the Tyres turned around on the Rims to even the wear up..!!

EDIT; Swapping Tyres from side to side would also Help even the wear up..
"Be who you are and say what you feel...
Because those that matter...
don't mind...
And those that mind....
don't matter." -
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Last edit: by hayseed.

Strange tyre wear - please help 20 Mar 2022 17:43 #233228

  • Lang
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Having wear on same side of both tyres does not seem a toe-in problem. At first glance it looks like some serious axle misalignment or bent chassis. I vote with Swishy also to do the front/back measurements. I vaguely remember bad camber on one side can produce similar tyre results, as well as any camber faults also effecting toe-in and castor measurements.

I would imagine if you let the wheel go it would always wander off to the the same side?

I am sure a truck alignment place would give you the answer in 10 minutes. At $500-800 for a pair of tyres a visit would seem a good investment. Never know it might be nicer to drive afterwards as well?
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Strange tyre wear - please help 20 Mar 2022 18:12 #233231

  • Mrsmackpaul
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Yep what the others have suggested about measuring axle to axle

Paul
Your better to die trying than live on your knees begging
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Strange tyre wear - please help 20 Mar 2022 19:09 #233232

  • PaulFH
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Agree with previous suggestions.

Inspect the steer axle closely - have seen them bent with hydraulic jacks
and clamps in an attempt to regain wheel alignment. Saw one almost
sheared and distorted in this way. Cruel what was done at times.

Might be quicker and cheaper to contact Ken Dennis, the Truck Whisperer
at Benalla. Worth looking at his U Tubes on steering, alignment etc.
I have no connection or first hand experience, but wish this service was
available in 1990, had to try to steer a prime mover with serious problems.
Heaps spent on laser alignments, trailer alignment, turntable position etc.
He does travel the country providing his services. Good luck with it. Paul.
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Strange tyre wear - please help 20 Mar 2022 19:26 #233238

  • 180wannabe
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About 12 months ago a bloke told me that running radial tyres on the steer of a truck not set up for radials will wear the tyres exactly as described/shown.
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Strange tyre wear - please help 20 Mar 2022 20:22 #233248

  • V8Ian
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Check that the rear axle is at 90⁰ to the chassis. A broken centre bolt can cause this problem, if not on air. Look at all bushes etc., the problem is likely in the back axle(s).
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Strange tyre wear - please help 20 Mar 2022 20:23 #233249

  • asw120
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Looks like what lots of roundabouts does.
Perhaps oddly, they don't look at all feathered. Bad toe setting will feather the tread.
I'll be interested to follow this one; my dad's bus won't go in a straight line.
Jarrod.

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― Adlai E. Stevenson II
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Last edit: by asw120.

Strange tyre wear - please help 20 Mar 2022 21:49 #233252

  • cobbadog
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A proper wheel alignment is high on the list of things to do. Check all steering and rear joints and bushes for wear. So many things can cause the problem from toe in, camber not adjusted to rear being out of square even doing tight "U" turns a lot. The outcome of the alignment always depends on the person doing the job. If they just want your money and do next to nothing then keep away. Get recomendations of people that know what they are doing and one has been suggested already and I thought by now a few shops would have been named. The closest one to me that I could trust is back down in Sydney at Narellan. The 2 local guys dont have a clue or the gear.
When I worked at BFT in town they started doing laser alignments and had a mobile service. We had some customers that had bad tyre wear everywhere and was sorted out. The system they used was the use of tapered wedges and looking at the specs at the beginning and again at the end this made a huge improvement and then aligned all the axles front to rear with great results. By the time I left that mob the mobile ser4vice was no longer offered and only done at Silverwater branch for what ever reason.
Do a thorough inspection of everything underneath then track down a good alignment.
Cheers Cobba & Cobbarette
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