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04-01-2014, 01:39 AM
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#1
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Montana Master
Join Date: Mar 2013
Location: Frostproof, FL USA
Posts: 2,362
M.O.C. #13272
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Tires & MPG
In another post I talked about my buddy who had a 40' SOB Toy Hauler. He finally switched to G614 tires and left Monday on his 7 month trip. He had also installed suspension air bags. His MPG went up from 8.5 to 9.5. He said he has never gotten 9.5 pulling before. he is running 105 pounds in his (6) G614's.
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Previous: 2008 Montana 3400RL & 2014 3725RL
Current: Full Time 2022 SOB TT Toy Hauler
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04-01-2014, 04:13 AM
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#2
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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I have no idea what air bags might do and I do have IS and don't really imagine they do anything either. The 614's on our rig definitely seem to make it pull better, but when you spend that much money your mind definitely wants to find something positive so in our case it could be mental. If he was pulling to a destination he has measured before then he has a right to get excited. I got excited when we first put them on because on a trip to Albuquerque I was only getting 9 and when we tow usually get 11. After stewing for several days it occurred to me that I'd never measured that trip and I-40 from OK City to Albuquerque is generally up hill and usually against the wind. Sure enough, on the way back I got 14.
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Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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04-01-2014, 04:18 AM
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#3
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Montana Master
Join Date: Oct 2006
Location: McKinney
Posts: 7,166
M.O.C. #6433
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Possibly the higher pressure and harder tires have less rolling resistance. On the other hand it could just be certain driving conditions so far that have led to the increase. I know my mileage can vary quite a bit due to terrain, wind, driving speed, highway conditions, and even temperature seems to have some effect. Will be interesting to see if it holds up over the long haul.
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Bill & Patricia
Riley, our Golden
2007 3075RL (recently sold, currently without)
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04-01-2014, 04:42 AM
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#4
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Montana Master
Join Date: Jan 2012
Location: Copperas Cove
Posts: 1,426
M.O.C. #12096
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I don't know if my MPG increased or not but I do know the ride got smoother with LT tires, and then when I put on the EZ Flex suspension it got smoother yet.
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04-02-2014, 02:03 AM
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#5
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Montana Master
Join Date: Mar 2013
Location: Frostproof, FL USA
Posts: 2,362
M.O.C. #13272
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Checked with him again last night. Went through 2 more tanks of fuel and got 9.6 MPG for the day. He is now convinced more than ever that the G614 tires have made the difference.
__________________
Previous: 2008 Montana 3400RL & 2014 3725RL
Current: Full Time 2022 SOB TT Toy Hauler
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04-02-2014, 02:10 PM
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#6
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Montana Master
Join Date: Nov 2007
Location: Atlanta
Posts: 908
M.O.C. #7915
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Post deleted...I got my tires mixed up and was talking about the wrong ones.
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04-02-2014, 03:42 PM
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#7
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Montana Master
Join Date: Oct 2012
Location: Box Elder
Posts: 4,697
M.O.C. #12947
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Might have an effect on mileage if these tires were on the TV, but on the 5er, higher pressure and stronger tire probably won't change shift points on the TV, except to lessen pull resistance when towing.
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Bob & Becky
2012 3402RL
2012 Chevy 2500HD D/A CC 4WD
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04-02-2014, 05:45 PM
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#8
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Montana Master
Join Date: May 2003
Location: New Bern
Posts: 4,294
M.O.C. #311
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I upgraded to G114 H rated tires on 17.5 rims and put some fuel addetative in the tank. I feel I have better fuel milage than before. Not sure which the after reading this believe the beter tires helped.
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04-03-2014, 02:52 AM
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#9
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Montana Master
Join Date: Mar 2013
Location: Frostproof, FL USA
Posts: 2,362
M.O.C. #13272
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He is convinced that it is the new trailer tires and I have to agree. Last year he pulled the SOB about 4,000 miles and stayed in that 8 - 8.5 mpg range. Nothing has changed with his truck except air bags, it is a Chevy 3500 SRW with over 80,000 miles. I don't want to sound like a Goodyear tire salesman, but based on his projected miles for his travels this season he could save $300 - $400 in fuel.
__________________
Previous: 2008 Montana 3400RL & 2014 3725RL
Current: Full Time 2022 SOB TT Toy Hauler
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04-03-2014, 05:40 AM
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#10
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Montana Master
Join Date: Feb 2007
Location: Winfield
Posts: 7,327
M.O.C. #6846
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__________________
Bingo and Cathy - Our adventures begin in the hills of WV. We are blessed by our 2014 3850FL Big Sky (previous 2011 3750FL and 2007 3400RL) that we pull with a 2007 Chevy Silverado Classic DRW CC dually.
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