Montana Owners Club - Keystone Montana 5th Wheel Forum - View Single Post

skypilot · 09-15-2009, 05:43 AM

Ron: I just looked at the diameter of the tire on the Michelin web site and compared it to the XP Rib 235/85R16 that a lot of have their units. At 32.2 inch diameter, they are the same. Given that, spacing between the wheels should be fine -- I'd be concerned about the clearance between the tires and the shocks and other mounting hardware -- the back spacing on the rims would have to be carefully determined to ensure that the tires don't run on something back there. That said, that then could create another problem if the tire/wheel combination is too far out -- clearance to the fenders as well as added stress on the axles. Given all this I recommend you talk to an axle / spring shop and see what they feel the running gear can handle. A lot of variables to be considered in changing things out that much I feel.

09-15-2009, 05:43 AM	#2
skypilot Montana Master Join Date: Jul 2004 Location: Manhattan Posts: 1,144 M.O.C. #1846	Ron: I just looked at the diameter of the tire on the Michelin web site and compared it to the XP Rib 235/85R16 that a lot of have their units. At 32.2 inch diameter, they are the same. Given that, spacing between the wheels should be fine -- I'd be concerned about the clearance between the tires and the shocks and other mounting hardware -- the back spacing on the rims would have to be carefully determined to ensure that the tires don't run on something back there. That said, that then could create another problem if the tire/wheel combination is too far out -- clearance to the fenders as well as added stress on the axles. Given all this I recommend you talk to an axle / spring shop and see what they feel the running gear can handle. A lot of variables to be considered in changing things out that much I feel.