| Author |
Message |
Nick Russell (66.82.9.32)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, May 18, 2003 - 11:05 am: | |
We just put new tires on the duals and front axle and moved the nearly new front tires to the tag axle. Then drove from Arizona to northern Michigan. The driver's side tire on the tag now shows some abnormal wear in certain areas. Not across the whole tire, just in spots. Almost like it is cupping or something. Inflation is good, did not notice any vibration on the trip, but this is a lot of wear for a relatively short number of miles. I know a tag tire can get scrubbed as you make turns and back into RV sites, but we only backed into one RV park site on the whole trip (have to love those free overnight parking places!) Anybody have any ideas on what's chewing this tire up? |
Peter Broadribb (Madbrit) (170.215.36.31)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, May 18, 2003 - 1:42 pm: | |
Nick,
I assume that the tire was balanced as it was on the front, but was it balanced using weights, Equal or the Centronic type external balancer?
You might find that there is insufficient pressure on the tag or the shocks are not functioning correctly. Cupping is normally caused by bad shocks or similar suspension problems and can be balance related in some circumsatnces. These problems allow the tire to bounce against the road.
Peter. |
Jayjay (198.81.26.108)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, May 19, 2003 - 2:09 am: | |
In addition to Peter's comments: check the alignment with a straight edge or string. It should be toed-in a bit, though how much I can't say. Also jack it up and check for a worn/cracked/mis-adjusted wheel bearing. Either of these will allow athe wheel to "shimmy" and cause cupping. Extreme camber differences compared to the drivers could also be a contributory factor. This could be a tough one. Let us know if you find out, since it may be important to us (me?) in the near future. ...JJ |
jmaxwell (66.42.92.19)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, May 19, 2003 - 2:59 am: | |
Cupping is generally a shock related problem. On the MCI's, bad tag axle bushings (worn or frozen)can cause severe abnormal wear of the tag tires. |
Buswarrior (Buswarrior) (64.229.213.47)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, May 21, 2003 - 10:52 pm: | |
Did you adjust the tire pressure after moving the tire to a dramatically lighter loaded tire position? A hard tire will magnify any of the other faults noted by bouncing more.
In the old days, MCI 40'r on Goodyear bias High Milers:
100# front
85# duals
75# tags
Check with YOUR tire manufacturer for YOUR recommended pressures for the weights on YOUR axles.
happy coaching!
buswarrior |