Community Forums

Rd1 · 05-21-2017, 01:07 PM

Any one with a Cornerstone with Passive Steer Tag Axle, could you please check your front tires for tire wear on the outer edges of the tire? Thank you.

Just curious to see if Spartan passive steer has this issue. Sorry, not sure why the picture ends up up side down!

The wear is on the steer and is on Michelin 365/70R 22.5" tires (front). It shows on both fronts and both outside edge (first thread) and the inside edge of the tire.

Marcosdad · 05-21-2017, 03:37 PM

I had to replace a steer tire on our '15 due to poor alignment. I'd look at that before the steerable tag.

lowejug · 05-21-2017, 04:43 PM

My anthem steers are the same brand and size and are doing the exact same thing.. I had a tire shop tell me that's it's common on this tire.
Said nothing to do with the alignment.. recommended to rotate them often as that will help the wear....

DSL417 · 05-21-2017, 10:35 PM

FWIW, from the day I accepted my 15 CS, the 365 steer tires had a slightly lower (maybe 1/32") than the rest of the tires...on both inside and outside. To me this would suggest design rather than an alignment issue. If it were an alignment issue, the wear would likely not be on both sides and uniform. And I did have it aligned within three months of acceptance, as the steering wheel was not quite straight, and I had a little drift. Since that time, I monitor wear (as the old guy who taught air brakes at Spartan in the class taught us) as well as visually. I have not noted any additional drift issues or unusual wear. As I plan to be in Orlando, I will spend the money to have a new alignment (as I'm three years and about 42000 miles at that time) out of my own pocket, just to be sure I'm still good. JMHO

Ann n Gene · 05-21-2017, 11:21 PM

This could also be an air pressure problem. Improper pressure for the load can cause this type of wear. Over pressure is as bad as underinflation.

rogelling · 05-22-2017, 02:03 AM

Last month in Middlebury we noted slight wear on steer outer side. Also my ride height adjustment was off by inch and a half lower on right. Spartan fixed all that including front bag valves but I had to pay $400 for alignment.

MRUSA14 · 05-22-2017, 03:21 AM

Quote:

Originally Posted by Ann n Gene

This could also be an air pressure problem. Improper pressure for the load can cause this type of wear. Over pressure is as bad as underinflation.

Over pressure leads to increased wear in the center of the tire. Edge wear points to underpressure, but there could be other causes too.

brobox · 05-22-2017, 04:59 AM

If this is a brand new coach and has not been aligned since loaded with your travel weight, I would have an alignment done, ask the front end shop about the wear. I had a 3 axles alignment for my first alignment and the ride height checked as I also had a tire wear problem. As Gene said, get it 4 corner weighted, fully loaded, then air the tires from the Micheline Chart to your weight. That will be the best way to correct the tire wear for your coach.

Rd1 · 05-22-2017, 06:10 AM

Thank you for the replies.

This is the 'other' chassis with passive steer. Just curious if spartan is experiencing the same. The problem is apparent on very many that I have seen, except new and very low miles (less 6k or so).

The coach had been scaled in all corners, aligned after load, in fact multiple times, due to tag axle mounting of center, which is another issue with that other chassis.

Tire pressures are based on load and what michelin recommends. infact just slightly more, a few psi.

I have taken tire temps after a 3 hr trip and the edges are a few degrees lower than the middle surface. this corresponds with the 110 psi and michelin recommendations. tire pressure is not likely the issue. and can't imagine the dozen units that I have seen would all have wrong air pressure.

So no one with a passive steer spartan cornerstone has seen this except perhaps one?

What air pressure for fronts do cornerstone owners with passive steer use?

Has anyone with spartan passive steer had their coach track side ways?

Thank you for your information.

chuckster52 · 05-22-2017, 07:17 AM

Quote:

Originally Posted by Rd1

Any one with a Cornerstone with Passive Steer Tag Axle, could you please check your front tires for tire wear on the outer edges of the tire? Thank you.

Just curious to see if Spartan passive steer has this issue. Sorry, not sure why the picture ends up up side down!

The wear is on the steer and is on Michelin 365/70R 22.5" tires (front). It shows on both fronts and both outside edge (first thread) and the inside edge of the tire.

Now, I had a 2004 Newmar MADP tag on a Spartan and it showed the same tire wear..outside and inside edge wear on both front tires
Spartan has a book with all type of front end tire wear photos in it and an explanation of what caused the tires to wear this way.....
the explanation of that tire wear was ,normal for over the road buses and trucks at highway high speeds...
so perfectly normal..this MADP at the time had 72,000 miles on it..
Anyone going to Spartan can look at the tire wear book..hope this helps,chuck