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Topic: Michelin Tire Specifications XZA-2 275/80R22.5 (Read 640 times) previous topic - next topic

Michelin Tire Specifications XZA-2 275/80R22.5

Our new to us 2004 U270 3610 came with XZA-2 tires. FOT replaced the tires with XZE tires 275/80R22.5. Both tires had a load rating of H. The original XZA-2 tires were discontinued. I would like to know the specifications for the original tires to compare them to what is now on the motorcoach. The new tires have a load rating for single tire of 7,160 pounds at 120 PSI. The front axle fully loaded is rated at 13,320 pounds. When fully loaded, the current tires are maxed out. I have been unable to find an old brochure or any specifications online. Does anyone have an old brochure or the specifications for the old tires that they can share with me?  Thanks, Larry
Larry and Terry
Ex 2004 U270 36'

Re: Michelin Tire Specifications XZA-2 275/80R22.5

Reply #1 –
Sorry. The front axle is rated at 14,320 pounds fully loaded. Larry
Larry and Terry
Ex 2004 U270 36'

Re: Michelin Tire Specifications XZA-2 275/80R22.5

Reply #2 –
If they were the XZA-2 low profile our '03 came with, here is the info from the owner's manual

(ETA here is the link to Michelin's load/inflation tables http://www.michelinrvtires.com/michelinrv/tires-retreads/load-inflation-tables.jsp .  It shows all their current 275/80R22.5 LRH tires share the same load/inflation specs, which are different than the now-discontinued XZA-2 low profile.)
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320

Re: Michelin Tire Specifications XZA-2 275/80R22.5

Reply #3 –
Michelle,
Thank you. It seems that the new tires installed have a higher rating than the old tires. It also seems that FOT never expected the front axle to be loaded to the maximum load rating. Or, tires can actually safely be run at their maximum load rating.
Larry
Larry and Terry
Ex 2004 U270 36'

Re: Michelin Tire Specifications XZA-2 275/80R22.5

Reply #4 –
The differences I noted were that at identical inflation psi, the newer models are actually rated for slightly less load BUT the newer tires support a higher inflation (120 psi versus the XZA-2's 115 psi) so ultimately can support higher load (as long as you inflate to proper levels). 

Difference in casing design perhaps?

Have you checked individual wheel weights as well?  Escapees' SmartWeigh program is one option http://escapees.com/SmartWeigh/Default.aspx , RVSEF is another (the latter will be at the Grandvention in September Weighing Schedule | RV Safety.com ).  If you're approaching max inflation needs, for safety it might be advisable to make sure you aren't over on one side, particularly if it's the front.

Michelle
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320
 

Re: Michelin Tire Specifications XZA-2 275/80R22.5

Reply #5 –
Michelle,
Actually, we weighed at a CAT scale on our way home from FOT. We were only able to weigh each axle. The front was 11,920 pounds vs max axle of 14,320. The rear axle was 19,000 vs max of 21,000. These weights were with full fuel, full water, 3/4 propane and empty black/grey tanks. Also, we were loaded with almost everything we usually carry on a trip. For information, we upsized from a 27 ft gas Itasca class A motorhome. So, we really do not carry very much stuff.
Larry
Larry and Terry
Ex 2004 U270 36'