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Old 08-26-2012, 09:01 PM   #1
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Tire Mileage Question - Steer Tires

Looks like it's time for Steer tires on my 08 Fleetwood Excursion DP Freightliner XP Chassis with one piece front axle but Before I buy another set I have some questions and concerns.

First, the rig has 31K. The steer tires are worn to replacement time. Very little tread.

Second, the rear tires are doing fine IMO. Lots of tread left.

Third, had an alignment performed 8K miles ago which caused a inside cupping, took the coach back to find out that the alignment was performed without setting ride height and even at that the alignment was not correct and the tech was no longer with the company. Company realigned the coach, 6K miles ago and no more cupping however the tires appeared to be wearing very fast but no unusual wear patterns at all.

From past experiences would you say that RV tires (Steer) only achieve 30K or could this coach require another alignment at a different shop specializing in RV's instead of a heavy duty truck shop. (limited to shop selection where I am home based)
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Old 08-26-2012, 09:47 PM   #2
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I would say....

no way should any tires be worn out in 30k. More like double that. I suspect you have too much tow in.

Your rig (and tires)are 5 years old. I would replace the steers regardless of wear, and perhaps the rears too, just on age.
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Old 08-27-2012, 08:51 AM   #3
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Quote:
Originally Posted by Galaxie406 View Post
Looks like it's time for Steer tires on my 08 Fleetwood Excursion DP Freightliner XP Chassis with one piece front axle but Before I buy another set I have some questions and concerns.

First, the rig has 31K. The steer tires are worn to replacement time. Very little tread.

Second, the rear tires are doing fine IMO. Lots of tread left.

Third, had an alignment performed 8K miles ago which caused a inside cupping, took the coach back to find out that the alignment was performed without setting ride height and even at that the alignment was not correct and the tech was no longer with the company. Company realigned the coach, 6K miles ago and no more cupping however the tires appeared to be wearing very fast but no unusual wear patterns at all.

From past experiences would you say that RV tires (Steer) only achieve 30K or could this coach require another alignment at a different shop specializing in RV's instead of a heavy duty truck shop. (limited to shop selection where I am home based)
I would consider having the alignment checked again. (Toe-In) in particular. 30000 miles on steering tires should not wear them out. About double that if all is kept in alignment and pressures are maintained. If all my trucker buddies get 80-100 K plus on steering tires I would guess that getting 60K on a good set of RV tires is not unreasonable. Usually age warrants a tire change before treadwear does. Have fun and seeya on the road.
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Old 08-27-2012, 10:02 AM   #4
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Having been down this road of shops that do not know what they are doing one has
to educate themselves so you can instruct them.
Ride height is very important both front and rear and has to be done before any
attempt at a alignment. The major problem is most shops do not have a clue on the
proper measurement or where to measure on a RV.
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Old 08-27-2012, 12:54 PM   #5
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Welcome to irv2.
Just replaced my steer tires with 38000 and ten years of age.
Rear tires are doing fine.
You need to have coach weight and follow Goodyear or Michelin tire pressure tables faithfully and you may need a Laser alignment for your thrust angles for chassis, something is not right with you chassis tracking.
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Old 08-27-2012, 08:25 PM   #6
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I got about 45,000 from my front tires and replaced them because one developed a blister on the sidewall. Still had tread for at least another 10-12k.
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Old 08-27-2012, 08:31 PM   #7
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Agreed, shouldn't wear the tires out that soon. Should get 100,000 miles out of them although they'll usually age out on an RV well before they wear out.
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Old 08-27-2012, 08:44 PM   #8
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Cupping means skipping

Cupping means the tire is skipping down the road. Inside wear means toe out. That is, if it is on both tires equally. Your post did not say if it was on both tires. Lazer doesn't mean much. An alignment can be done with a piece of chalk an a piece of string, if you find someone who knows what to do with it.

Ride height is important as that establishes proper camber, and that could be part of your problem. Cupping is when the tire is skipping or bouncing down the road. Could be caused by loose wheel bearing, loose suspension, loose anything up front.

Talk to some friends who have trucks, and ask who does their alignment. You are just driving a truck, with a different type of load than they are...
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Old 08-27-2012, 10:21 PM   #9
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Thanks to all that chimed in on this. I had the tires replaced today with Hankook AH-12's. Only choice I had was Michelin XZE2's or the AH-12's as the rig was in Reno and needed them right away, the Hankooks are a truck tire and cost about $400 ea + they charged me extra for dealing with the Tyron (first time they had seen one). Looks like the Truck Repair Center who did the alignment screwed it up again, I really thought that they got it right the second time (1st time they did not adjust/check ride height) that's when I got the cupping (both sides) and then the real fast tire wear on the 2nd adjustment but they did the height adjustment that time. Looks like I need recommendations for a good shop in the San Bernardino, Colton area of Southern California.

I am going to try my first posting of a couple of pictures of what’s left of the tires, I know that it looks like they were a little underinflated but I am running 115lbs on normally a under loaded coach.

Thanks!

Gary Witthans
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Old 08-27-2012, 10:28 PM   #10
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Here is a link to a guide on reading tire wear problems.
Daniels Tire Service | Retail and Commercial Truck Tire Centers | Tire Wear
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