justdee
Well-known member
Due to our schedules, we will not be taking it out on a trip until after the new year, but when I do go out, I'll reweigh it and see how it looks then.
2025 310RL
- Thread starter justdee
- Start date
- Status
Mike in North Wales
Well-known member
Check the single tire weight rating on the sidewall of your tires. This seems to be the most overlooked rating. It's also the weak point that will get you the fastest. An overloaded tire will heat faster and fail quicker than any axle. I'm living with a SRW right now with the rear tires just over max weight. I'm not happy about it, but I need to come up with dually money to fix it. Until then, I'll be changing tires more often.
justdee
Well-known member
Back to the missing screen that came off after three hours of driving after leaving the dealership.
Alliance sent me a whole new door assembly, even though all I needed was the metal screen boxed in red. I just popped that screen out and installed it on the original door. But not before I ran four self-tapping screws to attach it so it will not come off again. That screen just pops in and it's not very secure.
The dealership is also sending me a new bug screen, so I'm pleased with the outcome.
Alliance sent me a whole new door assembly, even though all I needed was the metal screen boxed in red. I just popped that screen out and installed it on the original door. But not before I ran four self-tapping screws to attach it so it will not come off again. That screen just pops in and it's not very secure.
The dealership is also sending me a new bug screen, so I'm pleased with the outcome.
Attachments
Hotrodjohn
Well-known member
Perhaps I should look at mine but it’s been bouncing around for thousand of miles and it’s still on
if the tire is rated at 3640 lbs is that multiplied by 2 or 4 & compared to what? Pin weight, axle weight, trailer weight?
Mike in North Wales
Well-known member
It's per tire, so each axle on a SRW can carry 7280 with those tires, distributed evenly side to side. This is ONLY what the tires are rated for, regardless of the axle weight rating.
justdee
Well-known member
Yes sir, I'll probably have to upgrade the tires to a 127 rated tire to give me some more cushion. I can't upgrade the truck until next year, so I'll just have to be careful until then and try to rearrange the load on the trailer to get it closer to specs.
It stinks, I thought I really did my homework on all of this before I bought the truck, and then the trailer. I knew it would be close, but did not expect it to be over in any area.
It stinks, I thought I really did my homework on all of this before I bought the truck, and then the trailer. I knew it would be close, but did not expect it to be over in any area.
Hotrodjohn
Well-known member
Been there………….
SnowSkierMan
Member
Thank you for posting the numbers. Very helpful to get real world numbers. My research seemed to indicate the ratings that would be close on the SRW are the rear axle and GVWR. (possibly the max tongue weight too?) Your total combined weight is well within specs as is the maximum 5th wheel weight rating. Your trucks GVWR is 12,100 Lbs. and you are just under 12,000 now. Adding the pots and pans, water and wife in the truck will probably put you just at the limit or a bit over. I am looking to have a Onan generator option on my 310 and that will add a little more weight than your 310
SnowSkierMan
Member
Tires should be 3750 lbs each, 7500 total and slightly more than the axle rating
SnowSkierMan
Member
I would assume by 2 meaning on the rear axle, you should not have more that 7,280 lbs. on it. If it was 4 that would exceed the weight rating of a dually which is 14,000 lbs. at 14,560. Everything interacts with everything else. You may have 7200 on the rear axle which is fine but that could put you over your trucks GVWR. All the manufactures tout how much their trucks can tow but don't discuss all of the other important variables. The GM 3500 SRW diesel like Justdee is rated to tow a 21,200 lbs. 5th wheel. If you tried this I can assure you the truck would be grossly overweight and exceeding all of it's weight ratings except towing capacity by a pretty large margin.
justdee
Well-known member
I have learned that the factory numbers are quite deceiving. How many commercials have we seen on TV touting the various HD trucks and there so called towing capacity, while never mentioning the axle rating.
This has been an eye opener for sure the past couple of weeks and I've learned a chit ton of it from you guys, so thank you.
I was convinced my new truck could handle the 310RL, now I realize how wrong I have been. At the very least, I need higher rated tires.
This has been an eye opener for sure the past couple of weeks and I've learned a chit ton of it from you guys, so thank you.
I was convinced my new truck could handle the 310RL, now I realize how wrong I have been. At the very least, I need higher rated tires.
justdee
Well-known member
In hindsight, I'd have gotten a dually, even though I have no desire to drive one on a regular basis. I like to use my truck for a multitude of applications, going off-road at times to hunt and fish is one of them and a dually is not suited for that.
We chose the 310RL as our RV and have no desire to change that, so we have to deal with it as best we can now.
Don't beat yourself up to much. It's all a compromise. I drive a dually all day everyday and its not much different than driving a SRW.
A dually can do most things with out issue except GO OFF ROAD! So if going off road is your thing I can see where you would shy away from a dually.
Nevertheless the towing parameters are very straight forward. They are based on pure physics they don't consider other uses of the truck.
Like: parking downtown, or going off road, or parking in an underground garage, or fitting in the garage. Going thru a drive thru lane, driving in Manhattan.
All of those other factors become personal decisions, that we each have to make.
Without a doubt a dually will be best for your RV TOWING needs, however the self proclaimed internet towing gurus really can't factor in for other uses of the truck! Picking the right truck for towing is all the gurus are good for ! LOL!
I went with a dually long ago, because I wanted a big, heavy trailer that I could to far and wide without restrictions or limitations.
RV towing was my singular priority ,my decision was straight forward and simple.
Keep in mind i use my dually as my construction work vehicle and that hitch can get in the way at times!
We all have some compromise to deal with.
Once you introduce other competing factors the decision is not so simple and the lines and parameters get blurred.
The best you can do is educate yourself and make the best decision for you, keeping safety and convenience in mind.
A dually can do most things with out issue except GO OFF ROAD! So if going off road is your thing I can see where you would shy away from a dually.
Nevertheless the towing parameters are very straight forward. They are based on pure physics they don't consider other uses of the truck.
Like: parking downtown, or going off road, or parking in an underground garage, or fitting in the garage. Going thru a drive thru lane, driving in Manhattan.
All of those other factors become personal decisions, that we each have to make.
Without a doubt a dually will be best for your RV TOWING needs, however the self proclaimed internet towing gurus really can't factor in for other uses of the truck! Picking the right truck for towing is all the gurus are good for ! LOL!
I went with a dually long ago, because I wanted a big, heavy trailer that I could to far and wide without restrictions or limitations.
RV towing was my singular priority ,my decision was straight forward and simple.
Keep in mind i use my dually as my construction work vehicle and that hitch can get in the way at times!
We all have some compromise to deal with.
Once you introduce other competing factors the decision is not so simple and the lines and parameters get blurred.
The best you can do is educate yourself and make the best decision for you, keeping safety and convenience in mind.
justdee
Well-known member
I'm looking into the GM TPMS but I'm trying to see if the sensors will also detect the heat of the tire? I see that those are called TTPMS. My GMC is capable of showing both but so far I have only seen the sensors that send both temp and heat are for the trailer tires. I'll be calling my local GMC dealership to see if they can clarify how it works and what it will cost me.
I've determined that the current tires are smaller than the factory tires, hence the lower load weight rating LR 125 or 3640 lbs. The factory tire size would bump it up to LR 126 or 3748 lbs. If I went a size larger, which would affect my speed odometer, to the LR 127, the load weight goes up to 3858 lbs.
Regardless of tire size, wouldn't a pressure/temp monitoring system be worth the cost? It seems it would be cheaper to add the sensors than replacing four, practically brand new tires just to get another 220 pounds worth of load capacity? Once the tires wear out, then upgrade to the correct size tire.
I've determined that the current tires are smaller than the factory tires, hence the lower load weight rating LR 125 or 3640 lbs. The factory tire size would bump it up to LR 126 or 3748 lbs. If I went a size larger, which would affect my speed odometer, to the LR 127, the load weight goes up to 3858 lbs.
Regardless of tire size, wouldn't a pressure/temp monitoring system be worth the cost? It seems it would be cheaper to add the sensors than replacing four, practically brand new tires just to get another 220 pounds worth of load capacity? Once the tires wear out, then upgrade to the correct size tire.
- Status