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06-01-2019, 12:02 PM
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#1
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Montana Fan
Join Date: Oct 2015
Location: Aquebogue
Posts: 120
M.O.C. #17988
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Tire spacing
Numbers keep changing in my old head so here goes. Presently I have tires on the Montana that have a 30.2" outside diameter, & I have 3 & 5/8" between the tires. Looking to replace with tires that have a 31.7" outside diameter, how much of that 3&5/8" am I going to loose.
John
__________________
2010,3075RL, Hickory
2016 Ford, 6.7, 4X4, SRW
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06-01-2019, 01:05 PM
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#2
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Montana Master
Join Date: Jan 2015
Location: Taylors
Posts: 562
M.O.C. #15948
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1.5 inches. You'll also get 1.5" closer to the top of the wheelwell.
Dual rear wheel/tire spacing is a critical element and should be done by well trained installers when changing designated sizes.
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06-01-2019, 02:08 PM
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#3
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Montana Master
Join Date: Apr 2006
Location: Mesa az
Posts: 2,945
M.O.C. #5651
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I don't believe Cal is correct. From center to edge would only increase one half of the 1.5 inches or .75 inches.
However the distance between tires would shrink to 2 1/8 inches. I don't know if that would be a problem.
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Tom and Gail
2013 Mountaineer 362
2012 Silverado 2500
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06-01-2019, 02:12 PM
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#4
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Montana Master
Join Date: Apr 2017
Location: 1000 oaks
Posts: 949
M.O.C. #19630
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For me the only difference is the expandable wheel chocks have to go in upside down since the adjusting bolt is unreachable now if right side up.
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2011 2955RL Gen-Y Executive Kingpin
2022 GMC 2500HD Duramax/Alison
4X4 Crew Cab/Standard bed.
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06-01-2019, 03:38 PM
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#5
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Seasoned Camper
Join Date: May 2019
Location: Knoxville
Posts: 51
M.O.C. #24025
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You will lose 1.5 inches of your 3 5/8. You divide the overall height difference in half, per tire, then add the two together for your 1.5. You will only be 3/4 of an inch closer to your wheel well. So yes, as twindman said, you will have 2 1/8 between your tires.
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Walt and Vicki Forester
2015 Ram 3500 Dually G56 ViAir/Hellwig Onboard Air/Springs BD 2Low Kit RDS 95 Gal Tank/Combo American Force 19.5 Falken Bi 850 225/70 19.5
2018 3730FL
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06-01-2019, 04:25 PM
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#6
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Montana Fan
Join Date: Oct 2015
Location: Aquebogue
Posts: 120
M.O.C. #17988
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Thanks to all for the response.
John
__________________
2010,3075RL, Hickory
2016 Ford, 6.7, 4X4, SRW
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06-01-2019, 04:48 PM
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#7
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Montana Fan
Join Date: Sep 2015
Location: Anaheim Hills, CA
Posts: 161
M.O.C. #17873
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Quote:
Originally Posted by lundwc16
Thanks to all for the response.
John
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I changed my tires from ST235/80 to ST235/85 and I didn't have any problems 3/4" increase to inside the fender well was never a problem
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2015 Chevy 3500 Z71 Long Bed and 2019 Montana 3120RL 20th Anniversary
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