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Old 07-26-2008, 12:27 PM   #41
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2007 25' Safari FB SE
Argyle , Texas
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Bruised Marathons?

I pulled out a few days ago wiyh my Rotochocks still in place. They rotated 1/2 turn. I backed up to get them back into position for removal.

I'm wondering now if this was enough deformation to bruise the tire?

I have been thinking of going to Maxxis tires and this may be a good excuse to do so now. However, the 65 mph max. speed does have me hesitating. I have noticed that the Marathon has an R speed rating (up to 106 mph). While I will certainly never tow at 100 mph, I do generally tow at 70 mph.

Ed
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Old 07-26-2008, 02:17 PM   #42
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Originally Posted by Buzzy4 View Post
....the 65 mph max. speed does have me hesitating. I have noticed that the Marathon has an R speed rating (up to 106 mph)...
hi buzzy4...

the R u c on the gyms, relates to radial ply construction.

ST (tires stamped with the special trailer SERVICE DESIGNATION) tires aren't speed rated,

in the way modern conventional passenger tires are.

basically the speed rating is the speed, passenger tires are capable of maintaining for 10 MINUTES before tire failure.

speed ratings are used for passenger car tires and some LT tires only.

ST designated tires are LOAD rated AT 65 mph...

with guidelines provided (inflation/load) for up use to 75 mph.

my reading suggests that all ST designated tires are load rated at 65 mph.

the bruising issue is important.

my approach, which may be total horsehocky, to this issue is....

1. mark the tire at the area it's been stressed (from curbs, chucks, ramps, blocks, holes or whatever)
2. remove from trailer and inspect the marked area, also inspect the rim carefully and wheel weights.
3. reduce air pressure to 20-25 psi and 'feel' the tire for soft spots or irregularities...
4. INFLATE to max psi +10 psi more (75 psi for a gym)
5. look for visual signs of belt or tire weakening, if ANYTHING is found, ditch the tire.
6. if it looks and feels normal, reduce pressure to 65 psi and use it again.
7. occasionally check the MARKED area for signs of weakness, while giving attention to temps and pressures.
8. if the space is a fresher, less worn or less "stressed' tire, consider swapping.

cheers
2air'
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Old 07-26-2008, 04:43 PM   #43
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Maxxis Tire Seperation

ST tires are only required ot be Speed Rated to 65 MPH.
No tire company (except for Cooper) has been willing to go the extra distance and produce a better tire.
Coopers marketing structure is what did those Custom Trailer plus tires in before they (the Custom Trailer Plus) could get a fair trial on the open road.
Next, I don't klnow where Buzzy4 gopt his information about R Speedrated Marathons but the goodyear sire still lists them as 65 MPH tires, SEE FOR YOURSELF.

http://www.goodyear.com/rv/pdf/rvbrochure.pdf

What brochure or website did Buzzy4 get this information from?
Mine comes from Goodyear itself as you can see above in the link provided.
Beginner
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Old 07-26-2008, 05:04 PM   #44
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...Next, I don't klnow where Buzzy4 gopt his information about R Speedrated Marathons but the goodyear sire still lists them as 65 MPH tires, SEE FOR YOURSELF.

http://www.goodyear.com/rv/pdf/rvbrochure.pdf

What brochure or website did Buzzy4 get this information from?
Mine comes from Goodyear itself as you can see above in the link provided.
Beginner

I got it from the Discount Tire website.

Tire Details - Discount Tire Co.

I have since found the max. 65 mph on the Goodyear website.

Ed
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Old 07-26-2008, 08:10 PM   #45
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Al - K4GLU,

You are either very unlucky or you ride the curb side of the road.

I used to bicycle a lot. It is amazing how much junk is along the side of the road. You get to see it all when you are going 14-16mph.

I try to never ride the side of the road with the truck & trailer or any of my vehicles.

35-37,000 miles since 2003 on four LRC LT's, 40psi and four LRD marathon ST's, 65psi.
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