Towing an empty toy hauler

[NIsaacs]

Here is an ST tire speed rated for 75mph: http://www.trailertiresandwheels.com/product/RS2358016G

Nick

 

[Jim W]

Jim, which ST tires are those with a speed rating? Generally, and by defenition, ST tires are 65 mph rated and don't carry standard load indexes or speed ratings. Not all trailer tires are ST, but all ST's are trailer tires.

Just curious if some companies are using the ST designation but building them to non-ST specs.

John,

They are WESTLAKE CR9064 tires and are standard on the CEDAR CREEK line from Forest River. The tires actually state they are a ST235/85R16 with nothing after the tire size. A little bit to one side is the weight/speed designation of 129/125L and also the wording that they are a G rated tire 14 PLY and actual load rating of 4070 LBS @110 PSI in an SRW, or a 3630 LBS @110 PSI DRW.

 

[AH64ID]

Road Master RM 170 235/75R17.5 with appropriate wheel.

http://roadmastertires.com/by-application/pickup-and-delivery.aspx

Strong tire, but it's slow at 62 mph!

So are you at 4K a tire? If so, any plans to upgrade the axles to 8K?

Here is an ST tire speed rated for 75mph: http://www.trailertiresandwheels.com/product/RS2358016G

Nick

I got this off the Sailun website "* All steel construction specifically designed for Trailer application only. "

That makes me think they are incorrectly using the ST designation to label a tire "Trailer Service Only".

John,

They are WESTLAKE CR9064 tires and are standard on the CEDAR CREEK line from Forest River. The tires actually state they are a ST235/85R16 with nothing after the tire size. A little bit to one side is the weight/speed designation of 129/125L and also the wording that they are a G rated tire 14 PLY and actual load rating of 4070 LBS @110 PSI in an SRW, or a 3630 LBS @110 PSI DRW.

Interesting. I wonder why they are labeled as ST but use non-ST placarding? By definition ST's don't use Load Index or Speed Rating. If you look at a true ST tire it won't have the 129/125L on it anywhere, as that's not how ST's are rated.

Makes me wonder if it's just a mislabeled Trailer Service Only tire or a mislabeled ST tire.

I can't find that model on their website, all the ones listed are only CRxxx, but with them being a Chinese tire company I think, nothing to back it up, that they are simply mixing tire designations.

 

[TJJEEPER]

Lively conversation!

I still own the Raptor 38' Toy Hauler (2 axle) and it came with load range E tires. 3 of them had tread separation within the first year. 2 separated on one short trip. I don't drive over 65 mph when towing and I'm not overloaded. On the trip where I lost two tires I did my best to guess which one would make it home and swapped the other with the spare. It didn't! Within the last 25~50 miles from home it shredded and amazingly didn't wipe out the wheel well! I promptly changed all 5 tires out to load range G and never had another problem.

The stock tires were of Chinese Manufacture and the rig was built by Keystone. Given Keystone's response and their overall customer service I will not own any Keystone product again.

 

[NIsaacs]

I never did understand the load index for sure. Most give 2 numbers, then the speed rating. Which number is the speed for? My truck has 126/123 R, 126 is 3748 and 123 is 3417, are they both rated R or just the 123?

Nick

 

[AH64ID]

They are both rated at R. The 126 is single rating and the 123 is the dual rating.

 

[NIsaacs]

They are both rated at R. The 126 is single rating and the 123 is the dual rating.

That makes perfect sense, why couldn't I figure that out?

Nick

 

[Jim W]

Strong tire, but it's slow at 62 mph!

So are you at 4K a tire? If so, any plans to upgrade the axles to 8K?



I got this off the Sailun website "* All steel construction specifically designed for Trailer application only. "

That makes me think they are incorrectly using the ST designation to label a tire "Trailer Service Only".




Interesting. I wonder why they are labeled as ST but use non-ST placarding? By definition ST's don't use Load Index or Speed Rating. If you look at a true ST tire it won't have the 129/125L on it anywhere, as that's not how ST's are rated.

Makes me wonder if it's just a mislabeled Trailer Service Only tire or a mislabeled ST tire.

I can't find that model on their website, all the ones listed are only CRxxx, but with them being a Chinese tire company I think, nothing to back it up, that they are simply mixing tire designations.

John,
Sorry Senior moment transposed numbers. The Tire number is CG960A.

Jim

 

[gtoli]

As I've mentioned in some other posts, we're looking at getting a 5th wheel TH to replace our '05 Wildcat 29BHS (which is now for sale). As I ponder the gagillion options, models, floorplans, etc. I got to wondering about towing while the TH is empty or lightly loaded. Most of the haulers we're looking at have a capacity far greater than I anticipate needing. I really don't see running with 160 gallons of water, a full fuel station, and a load of toys. Maybe half the water and a quad.

So, the question is, do I lower the tire pressure like I do when running the truck empty or just leave it at max and call it good? It seems like E rated tires (all the ones we're looking at have 16" rims and dual axles) would be pretty tough on all the insides if fully inflated.

I have a 5th wheel toy hauler (in signature) and I run empty with the tires at the recommended pressure of 110 PSI. I also changed from the stock 235/80 R16 to Sailun brand 235/85 R16 and new wheels with a proper higher PSI rating. The new tires have a higher load rating, the original tires were barely over the max weight for the trailer. My trailer came stock with a rubber bumper suspension, the brand eludes me at the moment. I run empty and have had no issues with things being moved or displaced inside.

 

[Cummins12V98]

Per GY Tech Support when let's say going from a "E" to a "G" tire use the weight/inflation chart for the tires and add 5psi to the recommendation.

My GY "H" tires are filled to 125psi because my two axles are 17,500# combined. I went from "E" to "G" and ran 85psi for thousands of miles and had perfect tread wear.

 

[BatMan01]

I have hauled mine empty and almost full (minus a toy) and i always tow with the tires at the rated pressure and lower when not towing. Dry weight of my 5th wheel tongue is around 2700 and full is 3300 so there is not much difference in ride quality.