Aug-07-2015 06:07 PM
Sep-15-2015 10:36 AM
Sep-15-2015 08:43 AM
carringb wrote:
M154's are pretty aggressive for a motorhome. They have more tread squirm than highway-tread tires, and when you install the on the rear only, you often get a little over-stear sensation, but its only from the tread squirm. It will get better as the tires wear.
You can also fix this by installing the same tires up front, because then they will also require more "slip-angle" to change direction, so they balance out.
PS - I run M55's, which are the same tread pattern but in light-truck flavor. I also ran M154s on several medium duty trucks.
Sep-14-2015 10:20 PM
Sep-14-2015 09:30 PM
Aug-13-2015 06:16 AM
gshantz wrote:I dropped my steer tires 10 pounds and my tag axles 20 pounds to get them to the proper manufacture recommended specs and it made a huge difference. Very noticeable and favorable.
Except for dropping the fronts down 20 lbs to 80 PSI as you point out, I'm nearly at Toyo's specs. (Thanks for the page link.) I'll do that before our next trip over the coming holiday - only 50 miles. 🙂 Right now I need to save some more pennies before taking it in for a checkup. I like your suggestion of things to have them check up on. It just blows me away as to how changing tires could make all that much difference in the ride.
As I said, I'll be sure to let you know when I get further info.
GS
Aug-13-2015 05:38 AM
Aug-12-2015 11:13 PM
holstein13 wrote:
I think I found the Toyo RV inflation guide here.
It would be nice to know your corner weights, but if your tires are equally loaded, it looks like you would use 90 PSI in the front and 90 in the rear tires as well. So I think you are correct.
I would definitely call Freightliner and get a good four corner alignment done. Look up your ride heights and have them adjust that as well. The rear wheel alignment can be as important as the front -- especially the way you are describing the rear going wide. While they are checking your suspension, have them check for loose connections, ball joints, etc.
Aug-12-2015 02:26 PM
Aug-12-2015 11:54 AM
Ivylog wrote:You are correct. I think I read the wrong line on the chart. Steer should be 80 and duals 90. I believe the OP said the tires are 245/75. But he didn't explicitly say all the tires are the same. Good catch.
Would help to know if they are 245/75 or 255/70. Assuming 245/75/22.5 then holstein13 is correct for the rear...90, BUT the fronts only need 80 (3860 single) for his 3670 lbs.
Aug-12-2015 07:57 AM
Aug-12-2015 05:15 AM
Aug-12-2015 04:57 AM
Aug-11-2015 10:27 PM
Mr.Mark wrote:FIRE UP wrote:WILDEBILL308 wrote:
What are your axel weights and what is the recommended tier pressure? What load range tiers are you running? Did it drive ok before?
Bill
Yep,
That's what I was going to ask too. Do make sure that your psi in the tires corresponds to the ACTUAL weight of the coach. And yes, I was also going to ask how well the coach handled BEFORE any tire changes. While it would be time consuming and, maybe a bit of a cost involved, it might be worth it to change all the new tires BACK to the originals, IF, the company still had them.
This of course, is just a suggestion.
Scott
Scott, kinda surprised that you want him to put his old and cracked tires back on. That's an accident waiting to happen. Or, did you mean purchased the exact same brand as the old tires?
Gerald, I've only changed tires once on our previous motorhome. There was no difference in ride or handling the day I drove off in the new tires. I did change to the exact same tire brand and size.
Hope that you can get it straightened out.
Good luck.
MM.
Posted By wrote:
Some tires require a break in, usually 500-1000 miles. The heat cycles will help the nylon belted tire to stabilize.
Aug-10-2015 07:26 AM
FIRE UP wrote:WILDEBILL308 wrote:
What are your axel weights and what is the recommended tier pressure? What load range tiers are you running? Did it drive ok before?
Bill
Yep,
That's what I was going to ask too. Do make sure that your psi in the tires corresponds to the ACTUAL weight of the coach. And yes, I was also going to ask how well the coach handled BEFORE any tire changes. While it would be time consuming and, maybe a bit of a cost involved, it might be worth it to change all the new tires BACK to the originals, IF, the company still had them.
This of course, is just a suggestion.
Scott