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Tires, Wheels, Brakes, Steering and Suspensions Discussion of preventative/corrective maintenance and other technical issues regarding your coach's Tires, Wheels, Brakes, Steering and Suspensions and related components.

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  #1  
Old 08-03-2019
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Default tire guru questions

We need to replace right side drive duallys. (You really don't want to know why; may or may not be covered in a WOG campfire conversation with lots of AB's. .) The existing Michelin 275/80 R22.5 XZA3 tires, according to Mich, are no longer produced and have been replaced with MICHELIN® X LINE ENERGY Z tire. The left side dullies are still the XZA3 tires, with 2-3 years left on them.
So here's the question: Is there any concern with mixing these two styles of Michelin tires on opposite ends of the drive axle. Or with mixing two styles of Michelin on the passenger side of the bus, i.e., with steer and tag tires?
Any and all insights are appreciated. Thanks in advance.
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Old 08-03-2019
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Why not put the new ones on the steer axle and the steer tires on the drive axle?


If you put the new tires on the drive,make sure they are the same diameter of the ones on the other end of the drive.
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Old 08-03-2019
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Follow-up question. Does the BMC40 us the 8.5 inch rims? Michelin's tech bulletin warns against using some tires on new production . . . .
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1997 BMC40 "Big Kidz Bus"
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Old 08-03-2019
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I think they are 8.5 wide,but put your glasses on and take a look,they will be marked,look on the drives.
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Old 08-03-2019
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Quote:
Originally Posted by Randy Dupree View Post
Why not put the new ones on the steer axle and the steer tires on the drive axle?


If you put the new tires on the drive,make sure they are the same diameter of the ones on the other end of the drive.
Hmmm, hadn't thought of using the steers. Would there be a rotation problem with moving the left steer to the right side?
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Old 08-03-2019
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Think about what you just said!!
At this time they all roll the same way!!
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  #7  
Old 08-03-2019
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Quote:
Originally Posted by IrishRovers View Post
Hmmm, hadn't thought of using the steers. Would there be a rotation problem with moving the left steer to the right side?
you have to have them taken off the steer wheels and mounted on the rear wheels. You determine which way they are mounted on the wheels.
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Old 08-03-2019
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Quote:
Originally Posted by IrishRovers View Post
Follow-up question. Does the BMC40 us the 8.5 inch rims? Michelin's tech bulletin warns against using some tires on new production . . . .
Most likely 8.25".

Maybe even upgrade the fronts from 275's to 295's - Read but verify:
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  #9  
Old 08-03-2019
dthollis dthollis is offline
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7.5" 1994 BMC.
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  #10  
Old 08-03-2019
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Like Dave said.
7.5 wide wheels on ours also.
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