Community Forums

IASM · 10-11-2015, 09:00 PM

SRH
I put the 365s on this weekend and noted a little more squish then the 315s had suggesting visually they may need more then the 105 based on weights. Do yours look different from how the 315s sat.

Steve Ownby · 10-12-2015, 06:59 AM

Quote:

Originally Posted by IASM

SRH
I put the 365s on this weekend and noted a little more squish then the 315s had suggesting visually they may need more then the 105 based on weights. Do yours look different from how the 315s sat.

Inflate based on actual weight or GAWR if actual is not available, not appearance of sidewall deflection.

Steve Ownby
Full time since '07

srh · 10-12-2015, 11:41 AM

Quote:

Originally Posted by IASM

SRH
I put the 365s on this weekend and noted a little more squish then the 315s had suggesting visually they may need more then the 105 based on weights. Do yours look different from how the 315s sat.

My corner weights are: L 8,348 lbs, R 8,700 lbs. Using Michelin's tire pressure guide I'm using 105 psi for 9,130 lbs. I could probably increase it some, but the ride I had back home (~60 mi) was not bad.

srh · 10-12-2015, 11:43 AM

Quote:

Originally Posted by Steve Ownby

Inflate based on actual weight or GAWR if actual is not available, not appearance of sidewall deflection.

Steve Ownby
Full time since '07

Thanks, Steve! As always, I appreciate your insight!

IASM · 10-19-2015, 08:38 PM

I wanted to post a final note in this thread in case someone searched it out. The update worked fine and all components are fine for clearance. The tires do run cooler then the 315s and the ride is about the same. Could be slightly quieter but I would not recommend making the update for ride quality improvement alone. My opinion is only make the upgrade to 365s if the 315s wont handle the weight. Im happy I did and have no regrets since all I really needed was the capacity.
Rod
08 magna 45ft

Mr_D · 10-19-2015, 08:47 PM

Weight capacity is the reason I upgraded the Dutch Star front tires from 275/70 to 305/70's. Ride was the same even though I went from 120 down to 105 after the change. But I was happy with the change, just like you are.

Stratman50th · 10-21-2015, 05:16 PM

This is interesting. The previous owner upgraded the front rims and tires. I need to check the mod# on the Alcoa's but the tires are 385/65 R 22.5 I swear that wheel looks 12" wide. I'm just wondering what those tires are going to cost me to replace. So the tag wheels/tires can be upgraded as well? Mine looks pretty close to the fender now. is there overhang on the axle side for wider wheels?

f360racer · 01-27-2021, 10:25 PM

Quote:

Originally Posted by Smitty77

When I was thinking of upsizing my 12R 22.5 to 315/80 22.5, the only Michelin tire I could use were the XZA2's. They existing 12R 22.5 are Load Range H tires (Load Range is ties into how much weight the tires are rated to handle.), the 315/80 22.5 tires were Load Range L - which is a pretty robust tire

!

This was going not to a 8.25" rim, and after some input from various sources, I elected to remain with the 12R 22.5 tires on the front end.

No big deal, was just curious if you also jumped on your Load Range change too.

Keep the rubber on the ground!
Smitty

Technical Specifications for Michelin 365/70R22.5

Overall Diameter

Tire overall diameter and not only the rim
42.5 inch

Recommended Wheels
10.5"

Tread depth
19/32 nds

Max Speed
75

Max Load per Tire Single
10500 lbs at what PSI? Some are posting they are now running at 105PSI what is the load rating at 105?

Loaded Radius

Tire radius when mounted on the loaded vehicle
19.6 inch

CAI
287097
MSPN
52215

jwlce · 01-28-2021, 06:06 AM

Quote:

Originally Posted by Steve n Jan

I have 315's on the front of my Magna, will need new fronts soon. have thought about 365's, Do I need new wheels to do that? If so, does anyone know what new ones from Alcoa cost? If they're way expensive I'd probably just go with 315's again

I want to say they were about $600 ea for the durabright but don't quote me. For my coach it certainly improved ride and they provided some well needed margin for loading weight on the steer axle. Wish I would have done it sooner. I was told by the Alcoa rep that Peterbilt gets the best discount and they provided me with the best price by a few hundred $.(locally)

jwlce · 01-28-2021, 06:15 AM

Quote:

Originally Posted by IASM

SRH
I put the 365s on this weekend and noted a little more squish then the 315s had suggesting visually they may need more then the 105 based on weights. Do yours look different from how the 315s sat.

Hi I saw the same so I bumped the tire pressure up to 112 to take a bit of the "softness" out of it and also to give me a bit of "cold weather margin" I found the 315 at 130 psi for the weight to have a harsher ride.

jwlce · 01-28-2021, 06:38 AM

Quote:

Originally Posted by MarkofSJC

365 Upgrade? I thought that was done for only to accommodate the 20k upgraded front axial that CC updated with the 2008 models (rear upgraded tag, too I believe). I'm not sure what benefit it would do to just upgrade the tires ~ except better ride because of reduced required pressure? What am I missing?

For some of our coaches the 315's were slightly under rated. My first coach weighing was @18400 on the steer axle with full fuel but otherwise lightly loaded. The label having 18000 and calling for 130 psi. What was interesting was that putting a heaver tire and rim on but at a lower pressure (105) REDUCED the steer axel weight to 17,400. The bulk of the weight was transferred to the drive axel. Both before and after were measures on the same cat scale. To my mind tire pressures have a somewhat dramatic effect on weight distribution. but that is just me.

IASM · 02-19-2021, 07:55 PM

I am not questioning your experience but changing tires would only change the scale weight by the difference in the weight of the wheel/tire combination.

**CountryFit** · 02-19-2021, 09:21 PM

This is a very old thread

. Funny thing I noticed srh now has a 05 HR Navigator. I vaguely remember he once owned a 08 Magna, then a 08 Monaco Signature. Wondering what his experience with those and the comparisons are...

srh · 02-20-2021, 07:40 AM

Quote:

Originally Posted by CountryFit

This is a very old thread

. Funny thing I noticed srh now has a 05 HR Navigator. I vaguely remember he once owned a 08 Magna, then a 08 Monaco Signature. Wondering what his experience with those and the comparisons are...

Well, you are right in that. I did the upgrade from 315 to 365 in my 2008 CC Affinity. We took some long trips on that coach and loved it. I wasn't looking for more capacity when I did the upgrade. That was a nice coach and wouldn't mind having another on. I sold that and bought a 2008 Newell, 43' w/3 slides. I did the 365 tire upgrade in the Newell. It was somewhat needed due to weight. I sold that after eight months. A year later, I bought the 2008 Signature - a very nice and well equipped coach, but had some issues with the chassis multiplex system. Fixed that and sold it. I don't think I will buy another 08 Signature.

About four months ago, I bought my current 05 Navigator. Due to Covid restrictions and cold weather, have not used much. It has 295 tires all around.
I hope this helps.
Stay safe and happy travels!