jmrkav Posted March 26, 2019 Report Share Posted March 26, 2019 After replacing my Goodyears with 235/85-16 Sailuns I find my tire spacing has reduced to 3/4 inch. The original Goodyears were about 2 inches. This is on a 2004 Newmar fifth wheel. I'm a little nervous about that. John Link to comment Share on other sites More sharing options...
NDBirdman Posted March 26, 2019 Report Share Posted March 26, 2019 Side-wall to frame? What size does the placard say for tires? 2002 Fifth Avenue RV (RIP) 2015 Ram 3500 Mega-cab DRW(38k miles), 6.7L Cummins Diesel, A668RFE, 3.73, 14,000 GVWR, 5,630 Payload, 27,300 GCWR, 18,460 Max Trailer Weight Rating(For Sale) , living in the frigid north, ND. Link to comment Share on other sites More sharing options...
Jaydrvr Posted March 26, 2019 Report Share Posted March 26, 2019 I suspect you're referring to sidewall to sidewall spacing, in which case there's nothing to worry about. The Sailuns are beefier tires and as long as you have a little space, they'll be fine. Jay Link to comment Share on other sites More sharing options...
jmrkav Posted March 26, 2019 Author Report Share Posted March 26, 2019 The spacing between the front and rear tires on a random axle. I notice that Sailun makes a G rated 235/80-16 tire that is an inch shorter. But with 400pounds less weight capacity. Still 110 max pressure. John Link to comment Share on other sites More sharing options...
NDBirdman Posted March 26, 2019 Report Share Posted March 26, 2019 Spacing tire to tire, I have about an inch when I put Michelin on my RV. Have about 3k miles on them, have not noticed any rubbing, nothing on the tread to indicate they are hitting. I run full inflation and camper around 13k. Most every set-up is different so I won't say your good to go, that's your call. For us, majority of miles is straight hiway so I don't know if off-road or rough road would bounce them together. 2002 Fifth Avenue RV (RIP) 2015 Ram 3500 Mega-cab DRW(38k miles), 6.7L Cummins Diesel, A668RFE, 3.73, 14,000 GVWR, 5,630 Payload, 27,300 GCWR, 18,460 Max Trailer Weight Rating(For Sale) , living in the frigid north, ND. Link to comment Share on other sites More sharing options...
CrazyCooter Posted March 28, 2019 Report Share Posted March 28, 2019 Goodyear G614s run smaller than a typical 235/85R16 more like a 235/80R16. The Sailuns run a bit larger than a typical 235/85R16. I run the Sailun 235/80 or Goodyear 235/85 on 33" wheelbase and 235/85 on 35". 3/4" is too close for my liking. Maybe install next heavier spring if you are loaded anywhere near the current spring capacity? This would likely buy you a bit of space. 1999 Peterbilt 385 C12 430/1650 13spd 2006 Dodge 3500 DRW 4x4 2010 Hitchhiker Champagne 36 LKRSB Link to comment Share on other sites More sharing options...
Ray,IN Posted March 28, 2019 Report Share Posted March 28, 2019 3/4" is the recommended minimum tandem tire spacing. All tires "grow" a bit when they reach normal operating temperature at highway speed, then there is the normal axle/spring movement; thus the 3/4" minimum. http://www.al-ko.us/download/AxisSpring-Axle-Hanger-Spacing.pdf 2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG retired;Good Sam Life member,FMCA ." And so, my fellow Americans: ask not what your country can do for you--ask what you can do for your country. John F. Kennedy 20 Jan 1961 Link to comment Share on other sites More sharing options...
jmrkav Posted April 1, 2019 Author Report Share Posted April 1, 2019 Dexter says 1 inch absolute minimum. I think to be on the safe side...I'm going to trade back the 235/85-16 for 235/80-16 Sailuns. They are the same height as the Goodyear 235/85. John Link to comment Share on other sites More sharing options...
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