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toothpull · 08-18-2015, 09:18 PM

I just put 16" tires on my 2016 RB 25 FC. No modifications needed. Performance Plus was great... put the MS Michelins on. Tires sent mounted and balanced. Sendel rims...t02. talk to Joel... a must upgrade

switz · 08-19-2015, 10:33 AM

I ordered the Dill TPMS 1503-453 system to use on both the SenDel 15"and 16" wheels.

I have watched the temperatures and pressure change and 75 psi works for us with the 16" tires. Our Classic tongue weight is about 1,200 pounds and the tailer axles are supporting around 8,200 pounds when we are camping ready (or about 2,050 pounds per tire).

We use 44 psi on the 15" Michelin tires for the 23D and also in the prior 25FB.

HowieE · 08-19-2015, 11:04 AM

Switz

Not sure what tire you are running but if they are LT225 175 16 with 8100 lbs your tire pressure should be 55 lbs.

Shiloh4570 · 08-20-2015, 11:52 AM

Last week I installed Sendel T03 16x6 wheels and Michelin LTX m/s2 225/75R/16 tires on my 2008 27' FB Classic. They fit perfectly. We are now at the 1/2 way point of our 1500 mile excursion and I am pleased to say the wheels and tires have made a noticeable difference in ease of towing. In fact, on this first half of the trip I have gained 1 mpg over what I normally achieve. I got the wheels from Treadit and they were great to work with, I had the wheels in 3 days. The tires I purchased locally and got a fair price, mounting was included. The tires I replaced were 2 years old to me and looked like new from the outside, Upon removal, it was reveled that the two on the driver side were starting to come apart. It would have been a blow out for sure, probably somewhere on this trip. Thanks to all on the forum that have done such a good job of research and promotion, I feel I am much safer going down the road.

dmnichols · 08-21-2015, 10:32 AM

Quote:

Originally Posted by dmnichols

I recently upgraded my 2014 Classic to 16" wheels from Treadit and Michelin tires. This was the recommended combo from airstream. What is very confusing is the PSI recommendation from Airstream of 80 lbs. PSI vs Michelin of 55 lbs. PSI. The 80 lbs. PSI is for a individual tire load of 3780 lbs. My trailer maximum load is 10,000 lbs., which is 2500 lbs. per tires if a balanced load. I sent the recommended PSI chart from Michelin nd they stood fast on the 80 PSI recommendation. Am I missing something????

So I was wrong about 55 lbs. because I read the chart wrong, which references axle weight vs tires. Here is the chart for your reference and I'm going to 75 PSI to meet my rigs weight profile.

I appreciate all the great input!!!!!

Here is the chart for the LT225/75R16, in the load and pressure tab: Tire and Retread Selector | Michelin Truck

toothpull · 08-23-2015, 12:09 PM

I just upgraded my 15" stock rims and tires to 16" rims and Michelins on my new 25' RB FC. I now have the stock unused rims and tires. Any interest? Please email! Thanks!

smccollister · 08-23-2015, 01:09 PM

We both like the OEM wheels on our Airstream and looking to move up to the 16" tires this year. Does anyone know if Sendel or anyone else have a 16" wheel close to the style we already have? Thanks

Ampman · 08-23-2015, 01:18 PM

Quote:

Originally Posted by toothpull

I just upgraded my 15" stock rims and tires to 16" rims and Michelins on my new 25' RB FC. I now have the stock unused rims and tires. Any interest? Please email! Thanks!

I just did the same thing. Was gonna post on Craigslist locally. Wonder what is a fair asking price?

switz · 08-23-2015, 01:54 PM

SenDel has the T02 trailer wheel that closely resembles the factory wheel shown in post #87 above. They are available with the correct lug nut configuration and off set for the 14", 15" and 16" Airstream applications.

At the moment, the SenDel website has indigestion and is not working properly.

smccollister · 08-23-2015, 04:13 PM

Quote:

Originally Posted by switz

SenDel has the T02 trailer wheel that closely resembles the factory wheel shown in post #87 above. They are available with the correct lug nut configuration and off set for the 14", 15" and 16" Airstream applications.

At the moment, the SenDel website has indigestion and is not working properly.

Thanks!

switz · 08-23-2015, 04:20 PM

I got this image off the SenDel Catalog but can not access the specifications today.

**jcanavera** · 08-23-2015, 06:28 PM

Quote:

Originally Posted by Ampman

I just did the same thing. Was gonna post on Craigslist locally. Wonder what is a fair asking price?

Sold mine for $50 each without the tires on Craig's list.

Jack

Ampman · 08-23-2015, 06:40 PM

Thanks

toothpull · 08-23-2015, 10:20 PM

I upgraded to 16" rims and tires. Sendel T02 very close to stock AS rims. Got mine mounted with Michelins, balanced and shipped free from Performance Plus in CA. Worked with Joel. Shipped and received in 3 days. Good price as well

Tireman9 · 08-24-2015, 09:45 AM

1. Tire loading. You need to either learn your actual individual tire loads when the TT is at its heaviest or figure the load is NOT split 50/50. When RVs are measured it is found that only a couple % are at 50/50 with many really at 47/53 to 45/55. So depending on how much risk you will accept and if you only have the measured total for all 4 tires you should first assume that one axle has 53 to 55% of the total and then that one end of that heavy axle is loaded to 53 to 55%. This would mean that with 4 tire measure load of say 7,856# you may have one axle loaded to 4,321# and one tire on that axle loaded to 2,377# but you don't know which tire that is.

2. Inflation
You really need some margin. Most cars run with a 13 to 20% margin for load capacity. A majority of RVs run with negative margin i.e. one or more tire in overload. Is it any wonder that RVs have a lot more failures than you see on cars. Also all tires on an axle should have the same inflation to avoid unexpected response in emergency braking.

3. Special consideration with tandem axles. Engineering analysis shows that since the tires on a trailer do not have the center of rotation that points to the center of the turn that the Interply shear for trailer tires runs about 24% higher than an identically loaded tire on a motorhome, truck or car. If you don't understand "Interply Shear" which is the structural forces that are trying to tear the tire belts off the body of the tire i.e. belt separation, I suggest you Google the term "interply shear rv tires"

4. If you want to lower the Interply shear you should run the inflation on the tire sidewall associated with the max load capacity. This will decrease that extra 24% but not completely eliminate this force. This is probably one of the main reasons TT may only get 3 - 5 years on their tires while cars, trucks and motorhomes may get 5 - 9.

Pat Cassity · 09-07-2015, 09:22 AM

My 16" tires and wheels are in will be installed in the next few weeks. I have also purchased the TST monitoring system and Centramatic balancers. I have another question about air pressure. If the tires are inflated to 80 psi when cold, and the pressure increases (or decreases ) after a few hours on the road due to temperature fluctuations, should the air pressure be adjusted? I checked my pressure before my last trip and the pressure in each tire had dropped from 65 to 57-60 in each tire. I added air before my trip to bring each tire back to 65 psi. After about 2 hrs on the road, I checked the pressure again and each tire had over 70 psi. All thoughts are appreciated.

Sent from my iPad using Airstream Forums

KYAirstream · 09-07-2015, 12:49 PM

Quote:

Originally Posted by switz

SenDel has the T02 trailer wheel that closely resembles the factory wheel shown in post #87 above. They are available with the correct lug nut configuration and off set for the 14", 15" and 16" Airstream applications.

At the moment, the SenDel website has indigestion and is not working properly.

What is the offset that's required?

dznf0g · 09-07-2015, 01:29 PM

Zero

Al and Missy · 09-07-2015, 02:18 PM

Quote:

Originally Posted by Pat Cassity

My 16" tires and wheels are in will be installed in the next few weeks. I have also purchased the TST monitoring system and Centramatic balancers. I have another question about air pressure. If the tires are inflated to 80 psi when cold, and the pressure increases (or decreases ) after a few hours on the road due to temperature fluctuations, should the air pressure be adjusted? I checked my pressure before my last trip and the pressure in each tire had dropped from 65 to 57-60 in each tire. I added air before my trip to bring each tire back to 65 psi. After about 2 hrs on the road, I checked the pressure again and each tire had over 70 psi. All thoughts are appreciated.

Sent from my iPad using Airstream Forums

The inflation pressure on the sidewall is the maximum COLD inflation pressure. You do not need to reduce it for temperature increases when running. "Cold" means no running, no sun, for 2 hours or more.

If you go to a substantially higher altitude it may read higher when cold as the gauge reads the difference between the tire pressure and the atmosphere. If it reads high when cold at altitude, you should reduce it.

IMHO, YMMV, etc.

Al

switz · 09-07-2015, 02:36 PM

The SenDel site wheel specifications area was operational today. See the attachment.

We used the SenDel T03-56545BM wheel on the 2015 23D International Serenity to replace the OEM 14" GYM ST215/75R14C tires rated 1,870 pounds @ 50 psi mounted on the factory stock 14" wheels.

We installed the Michelin LTX (P) 235/75R15 XL tires which are sidewall rated 2,183 pounds @ 50 psi, but must be derated to 1,985 pounds for trailer use. (See 49 CFR 571.110 for the derating details) We run 44 psi per the CanAm pressure suggestion which is the same pressure we used with this tire when I installed them on our 2013 25FB International Serenity that had a GVW of 7,300 pounds versus the 23D GVW of 6,000 pounds.

Mechanically on the 23D, we had to trim the metal on the front curb side wheel well opening to be about ¾" away from the plastic wheel well which is the opening setback from the wheel well on the street side of the trailer. The opening was 3" set back.

Our 16" Classic wheel and tire conversion used the T03-66655T wheel which is the model Airstream installed on the Eddie Bauer and installs on the 2015 and later Classic. This wheel plus the Michelin LT225/75R16/E LTX M/S2 tires are for sale at the Jackson Center customer service store as replacements for most 15" tire and wheel applications.

Note that the 14" Airstream wheel hub was used in the 15" SenDel wheel as they both had the same 3.19" center bore. The factory 15" wheel hub was used on the 16" SenDel wheel as they both had the same 4.50" center bore.