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12-27-2014, 03:56 PM
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#1
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Senior Member
Join Date: May 2013
Location: Colby, KS
Posts: 104
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19.5 wheels on 1 ton SRW
We purchased a 2004 Mobile Suites and will tow it with a 2009 F350 11.4 GVW F350. The truck handled the coach beautifully on the trip home. Just out of curiosity, I weighed it at our local elevator and was surprised at just how heavy it was. All the specs we could find online indicated it should weigh just under 12K, in actuality, it's over 13K before we load our gear.
Front axle is 5,280/6K rated and the rear axle was 6,380/7K rated. Total on truck with me in the chair was 11,660/11.4 rated, and the total gross weight is 22,140/23.5 rated.
The wife and I do not full time and carry very little belongings as we only go for for a couple days. We also don't carry water as we stay in facilities that have full hookups. If we were full timing I'd look at a dually. If we scale this rig loaded and I think it's too heavy, I might end up with a dually anyways, but I'd like to avoid it if possible. Running at gross weight doesn't bother me as we run trucks commercially hauling bulk commodities and are loaded to gross weight 80K daily with no problems. I know we will be slightly over the GVW for the truck, but I don't think we will be over by much if any on the axles. In reading the spec on a 10.5 Sterling axle, I'm finding it's rated up to 9,700 lbs in other applications. I'm guessing the main reason the axle is rated as such on a SRW truck is the tires. I'd like to replace the factory 18" tires with 19.5 wheels and tires. That would give us more than enough tire capacity if we approach 7-7.5K on the rear axle. Has anyone done the conversion and what's your thoughts?
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Trent & Jody.
2004 DRV Mobile Suites 33RS3
2016 Ford F350 DRW Lariat 6-pack 4x4 Diesel 14k GVW
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12-27-2014, 05:27 PM
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#2
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Member
Join Date: Apr 2014
Location: North Carolina
Posts: 64
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My concern would be finding tires in 19.5" that are rated to carry enough weight. We run an 09' Dodge with factory 18" rims and I replaced the tires the first of the year with a set of Michelin's that are load range E's. Hauling heavy with a 5th wheel I personally would want to stick with a heavy rated tire to error on the safe side. Just make sure that your looking at the proper load range for the load your hauling and enjoy.
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2014 Fuzion FZ 395
2016 Ram 3500 Dually 6.7 Cummins, 6 Speed Manual
2009 EZ Go electric 6 inch lift
The finer things in life.
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12-27-2014, 05:43 PM
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#3
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Senior Member
Join Date: Apr 2012
Location: KY
Posts: 386
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I would think you could find the tires easily. Many of the f 450 and f 550 trucks and now some dodge come standard with 19.5 tires and wheels
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12-27-2014, 06:09 PM
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#4
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Senior Member
Join Date: May 2013
Location: Colby, KS
Posts: 104
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Tires are easy. My shop that handles my truck tires keeps several brands in stock and can order what they don't carry. As for wheels Vision and Rickson make direct replacement rims that bolt on without adapters. I believe F450 wheels are 10 bolt vs 8 bolt on the F350
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Trent & Jody.
2004 DRV Mobile Suites 33RS3
2016 Ford F350 DRW Lariat 6-pack 4x4 Diesel 14k GVW
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12-27-2014, 06:25 PM
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#5
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Senior Member
Join Date: Mar 2014
Location: Las Cruces
Posts: 4,665
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The only concern I would have is getting them balanced. I've heard a lot of places cannot balance the large diameter wheels. I'd check that and as long as you can get what you want and can get them balanced I don't see why not
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Brent
2013 Alpine 3500RE
2019 Silverado 2500HD Duramax
U.S. Air Force Retired (25 yrs)
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12-27-2014, 06:38 PM
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#6
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Senior Member
Join Date: May 2013
Location: Colby, KS
Posts: 104
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I've read about some balance issues. My shops that handle our OTR trucks can spin balance tires. I've had some shops use stick on weights, others have used balance powder. I don't know what's the best method now. I'd think a competent shop that deals in truck tires could handle it as mentioned above 450's come with them. My tire dealer did recommend spending the money for a name brand tire as they will be truer and balance easier.
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Trent & Jody.
2004 DRV Mobile Suites 33RS3
2016 Ford F350 DRW Lariat 6-pack 4x4 Diesel 14k GVW
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12-27-2014, 07:56 PM
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#7
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Senior Member
Join Date: Jul 2014
Location: Nevada
Posts: 2,695
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If the diameter changes much, the ratio may change to something that may affect the towing ability. Something to consider...
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Desert185 🇺🇸 (Retired Chemtrail vendor)
-Ram 2500 QC, LB, 4x4, Cummins HO/exhaust brake, 6-speed stick.
-Andersen Ultimate 24K 5er Hitch.
-2014 Cougar 326SRX, Maxxis tires w/TPMS, wet bolts, two 6v batts.
-Four Wheel 8' Popup Camper.
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12-27-2014, 08:03 PM
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#8
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Senior Member
Join Date: Mar 2014
Location: Las Cruces
Posts: 4,665
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I use balancing beads in my dually and love them. Seems to be the only way I can get rid of high speed vibration
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Brent
2013 Alpine 3500RE
2019 Silverado 2500HD Duramax
U.S. Air Force Retired (25 yrs)
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12-27-2014, 08:52 PM
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#9
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Senior Member
Join Date: Jul 2011
Location: Ottawa Valley
Posts: 329
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With 19.5's and running empty it will shake the fillings out of your teeth, unless you drop a lot of air out.
With 5th you may be over the GAWR for the rear axle but hopefully not by much?
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2011 325SRX , Mor-Ryde Pinbox
2004 Ram 3500DRW 6spd,4x4,QC.LB ,340L aux tank
1999 Concours
2014 FJR
2014 Jetta TDI
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12-27-2014, 10:25 PM
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#10
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Senior Member
Join Date: Nov 2012
Location: Fruitland
Posts: 3,357
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Yes you can get them as others have said. I almost did but, I got tires max rated 3740 lbs on 16" rims and they work (carry the weight). Many on the Arctic Fox web site that have SRW 1 tons and carry the giant campers use them. All say the ride is a back killer without the camper on the truck. We are talking carrying 5,000 lbs or more in the bed. mine was 4400lbs. One guy had the best idea. He used the factory tires/wheels and changed them out to the 19.5s when going camping.
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2013 24RKSWE (27ft TT) Cougar 1/2 ton series SOLD 10-2021
2013 Ford F350 4x4 CC 6.7 engine, 8 ft bed, 3.55 rear end, lariat package
Retired from Oregon State Police in 2011 than worked another 9.5 years as a small town traffic cop:
As of 05-2020, I am all done with 39 years total police work. No more uniforms for me.
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12-28-2014, 05:55 AM
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#11
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Senior Member
Join Date: May 2013
Location: Colby, KS
Posts: 104
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I installed Torklift Stable loads some time back and they engage the overloads sooner than when stock...being its a short wheelbase, and I usually keep the rear tires at 80 psi, it finds every breaker joint in the road as it is! Lol! We don't use it as a daily driver. Although the current tires will be due for replacement (another reason why I'm contemplating converting now), they would last a while in a non-towing situation. For me its probably not worth the hassle of switching back to stock when not towing as we just don't drive it enough otherwise.
__________________
Trent & Jody.
2004 DRV Mobile Suites 33RS3
2016 Ford F350 DRW Lariat 6-pack 4x4 Diesel 14k GVW
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03-17-2015, 02:04 PM
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#12
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Senior Member
Join Date: May 2013
Location: Colby, KS
Posts: 104
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Finally loaded the coach for a week long trip. Weighed on the CAT scale full of fuel and me in the chair. 5280 front, 7040 rear, 23,500 gross. I asked my Ford service manager if it would concern him running at capacity. He stated they have seen several of these trucks over the years that are abused and overloaded and have yet to see a wheel failure. I think I will order some 4k rated Toyos for the factory rims and be fine.
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Trent & Jody.
2004 DRV Mobile Suites 33RS3
2016 Ford F350 DRW Lariat 6-pack 4x4 Diesel 14k GVW
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