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Old 04-07-2022, 08:44 AM   #21
Camp CA
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You did not specific the tire specifications........ply rating (number of ply), load index, speed index and load rating. I would consult these specifications AND make sure your tires are inflated to the required psig for the load they are carrying BEFORE towing at 75 mph, if you choose do do so, to be sure you are towing with sufficient safety margin.

My trailer tires have a G ply rating, (14 ply), 129/125 load index, 75 mph speed index and 4080 lb load rating and drive 62-65 mph and occasionally 70 mph when passing a truck.
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Old 04-07-2022, 08:54 AM   #22
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My comfort range (when towing) is 62-68 mph on posted 65 mph roads, and slightly less on posted 55mph roads. I don't think too much about mpg as it pretty much averages out to around 9 mpg regardless of the speed or distance.
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Old 04-10-2022, 06:14 PM   #23
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I ran 65 plus/minus 2 and got about 11 mpg without wind. When fuel prices jumped I dropped 2-3 mph and got close to 13 on our trip to/from Miami. Tailwinds or long, straight downgrades are incentive to bump up a few, opposite conditions will put me down to 60. I would rather get passed than pass-I see some flying by and wonder who is paying the fuel bill. Otherwise I want the speedy folks in front of me.
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Old 04-11-2022, 05:27 PM   #24
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We tow our 381th between 60-65mph never more regardless of posted speed limit tow with 2012 f350 6.7 powerstroke
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Old 04-12-2022, 04:56 AM   #25
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We are usually at 65 mph with the cruise on and diesel brake engaged, The truck is happy at 1600 rpm, momma is happy, and I just get to drive. Its all about the journey!
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Old 04-12-2022, 08:57 AM   #26
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In or around ATL, you'll be lucky to be pulling your TT at 30mph, even where the limit is between 55 and 70. Other times, you'll get run over if you're not at least going 65.

When I have an open road or light traffic, i average between 62 and 70 depending on the level of traffic around me. If it's just me, I'll go 70. If cars are around me, I drive no more than 65 and let them pass me if they wish.

On backroads and state roads, I normally drive around 50-55. Again, it depends on how curvy the road is, the width of the road, and how much traffic (including animals) I see. We take backroads if possible because we like the scenery and aren't in a hurry to arrive.

Last weekend i saw a Land Rover (or something similar) pulling a Cougar 1/2 ton on I-20 going to Alabama. I was going close to 70, and it passed me like I was in reverse. As i kept going, I was just waiting for traffic to stop because that moron flipped it or slammed into a stopped vehicle. Thankfully that didn't happen. It was going so fast i couldn't see exactly what type of vehicle it was.
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Old 04-12-2022, 02:28 PM   #27
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I won't admit what I've done in the past on an open road going downhill...but I've learned to enjoy the ride at no more than 65 this last couple years. 60-65 is a-ok with me, so much scenery you miss and reaction time compromised when barreling down...not to mention the highway congestion in AZ is increasing seemingly exponentially every year!
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Old 04-12-2022, 03:03 PM   #28
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I usually max out at 65. I’ve done plenty of trips at 70 in the past and felt perfectly safe/comfortable. But, for me with my old rig and my F150 I’d go from 10mpg at 65 down to 8 or so at 70 so I chose to slow down to save some money. With the new rig and the F350 I’m assuming it’ll be a similar story. But, I’ve only towed the new rig once with the new truck so far. I did 65 and averaged 7.9 mpg, but the winds were pretty crappy. Can’t wait to get it out on the road more.
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Old 04-12-2022, 05:42 PM   #29
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Well, I guess I’m the odd man out. I’ll set cruise at 69-70 when we head west towing the camper. The brand of tires on this camper is Sterling, load range G, 14 ply.
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Old 04-13-2022, 07:27 PM   #30
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I drive at a speed that under most conditions' where folks pass me. That speed is normally around 55 to 65.
I just like to relax and not have to jockey around traffic, I prefer to be, the slow guy

If I ever find a slot where everyone is just chilling and pulling, then fine, I'll join the flow, but that is akin to finding a buck 50 a gallon premium gas nowadays
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Old 04-13-2022, 07:43 PM   #31
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65 is my maximum. Stay in the right lane on four-lane roads, second from right lane on six or more lanes. Almost everyone is passing me, but I don’t mind.
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Old 04-14-2022, 08:01 AM   #32
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We have a Ram 3500 dually diesel pulling a 39’ fiver weighing about 15k. We also usually do about 60-65. On interstate it may occasionally creep up to 70 but not very often. I also feel more relaxed at these speeds. The truck will certainly pull 75-80 but mileage decreases exponentially.

But assuming that your truck pulls your trailer okay and you have no sway or instability, then the limiting factor is the speed rating of your trailer tires.
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Old 04-14-2022, 08:31 AM   #33
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Good reading the above

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Old 04-14-2022, 08:42 AM   #34
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Two trucks - one 2021 F-150 3.5 EcoBoost and a 2022 F-350 DRW. The 34' Continental Cargo (13,900) I pull usually 70 with the 350. The 220RD, either 65 or 70. With the F-150, the 220RD vs fuel mileage is best around 65. 70 is about the same if there's no headwind above 10~12 MPH. If we run together, it's 65 usually. Will back off from that some if the wind really starts to ramp up. The 220RD has a high sail area and it's a PITA with either truck in the wind above 25 MPH. Thats my only complaint about the 220RD - it's too tall and the front (because of the bedroom) is a little too vertical. It's like dragging a couple of pieces of plywood down the road LOL. I think with a little engineering they could have put that thing as much as 12" lower.

Over all 65~68 is about where I like to run. Especially at 21K total rolling. Most Texas roads are signed for 75 so you can expect most people going by are running 78~85.
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Old 04-14-2022, 09:04 AM   #35
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Will stay between 60-65. My mileage seems to like 62, right at 2200 rpm...
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Old 04-14-2022, 10:11 AM   #36
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I have an 11,000 pound 5th wheel and a 3500 Duramax Silverado. Trailer tires are rated for 83 mph. I set the cruise on 70 and forget it (assuming that's either at or below the speed limit or what traffic is flowing at.
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Old 04-14-2022, 10:45 AM   #37
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My truck gets the same mileage whether I am towing an empty car dolly or my SGS, speed has no effect, nor does wind....I get just at 13. No load varies with speed, up to 24 mpg.



I guess if I had to pick a favorite speed it would fall in that 60-65 range as that is my best gearing:RPM. I will not exceed 70. Traffic has a big bearing, road condition another (old new bumpy), and the special one, wind, which can really slow me if it is a sideways 40+. I do not like swaying. Then there is rain or snow, hills. Hard to say, just try to stay just slower than the average traffic on divided and on single I try not to slow a line down
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Old 04-14-2022, 11:04 AM   #38
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One thing to keep in mind is that the Posted speed limited of any roadway is the Maximum speed allowed for that roadway. You can go as slow as you want as long as you aren’t impeding traffic (usually 5 or more vehicles).

The max speed I tow at is 65 mph. On a multiple lane highway I stay in the 2nd lane from the far right so I don’t have to compete with vehicles entering/exiting. I always check tire pressure on TT and TV before leaving CG and use TPMS during trips.

One of the fastest ways to experience a blowout is to have your tires under inflated. It allows too much flex in the sidewalls, which generates heat causing the sidewalls to fail.
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Old 04-14-2022, 11:25 AM   #39
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60-65 mph max or follow truck speeds.
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Old 04-14-2022, 11:40 AM   #40
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Quote:
Originally Posted by Wohnmobil View Post
One thing to keep in mind is that the Posted speed limited of any roadway is the Maximum speed allowed for that roadway. You can go as slow as you want as long as you aren’t impeding traffic (usually 5 or more vehicles).

The max speed I tow at is 65 mph. On a multiple lane highway I stay in the 2nd lane from the far right so I don’t have to compete with vehicles entering/exiting. I always check tire pressure on TT and TV before leaving CG and use TPMS during trips.

One of the fastest ways to experience a blowout is to have your tires under inflated. It allows too much flex in the sidewalls, which generates heat causing the sidewalls to fail.
I did see minimum speed limits going to Florida. I believe it was 45 min in 65 and 50 in 70.

Georgia will arrest habitual left lane squatters also…if I rememeber correctly
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