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 > Your search for posts made by 'spotrot' found 17 matches.

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  Subject Author Date Posted Forum
RE: Unusual tire wear

I do not know how to view the other pictures, the links dead end for me. Can you quantify, the tread wore quite a bit? 1/16, 1/2 or something else. Would also mind posting what your corner weights were? Wouldn't hurt to have someone else confirm your tire pressures. And I am totally confused, are you reacting to measured tire wear or the change in color in the photo? Thank you for your reply. The different color appears to be a softer substrate and that was what concerned me. The front weighed in at 2,700 lbs per each tire. The load information chart for 245/70R19.5 lists no values for less than 80 psi / 3640 lbs. My RV's weight is well below (25% below) that, I ran 90-95 psi and the tires still wore significantly more on the outer treads. (And it checked the gauges I used with another gauge.) Just a FYI in case it helps others. Thanks to all for your comments and tire information. It was a good learning experience.
spotrot 04/07/20 10:30am Class A Motorhomes
RE: Unusual tire wear

Contact Roger Marble-- this is what he did for a living (retired tire forensic engineer): Roger monitors the FMCA Forum and is on the FMCA Technical Advisory Committee. You can make a post in this area: https://community.fmca.com/forum/17-tires/ There is no cost to participate in the FMCA Forum and is even open to non-FMCA members. Just click on "Start new topic". Thank, very informative site. I tried posting with "start new topic" but it now requires that you pay an annual fee to join and post Incorrect. You do not need to join FMCA to participate in the FMCA Forum. Right on the forums home page is a option to create a forums only account if you do not want to be a member. Thank you again - your direction helped me find the place to create a forums only account
spotrot 04/07/20 10:19am Class A Motorhomes
RE: Unusual tire wear

Contact Roger Marble-- this is what he did for a living (retired tire forensic engineer): Roger monitors the FMCA Forum and is on the FMCA Technical Advisory Committee. You can make a post in this area: https://community.fmca.com/forum/17-tires/ There is no cost to participate in the FMCA Forum and is even open to non-FMCA members. Just click on "Start new topic". Thank, very informative site. I tried posting with "start new topic" but it now requires that you pay an annual fee to join and post
spotrot 04/01/20 04:01pm Class A Motorhomes
RE: Unusual tire wear

3rd tryhttps://ucca1f5d8dbefdec1cc8843a2f95.previews.dropboxusercontent.com/p/thumb/AAyDOSW_XGBadk5_kc3j6qHU31UNJ4aPZf5nNj1iLa5kHvIVvx-YUGoAX7qGYVWFp9VyWdDaUfMGPPrGMx2Z2LhD7Ws-AyD5Vk-WCSvdTNucUSgRwYJqijFYM7YL0tBlI6QDd4GBEx4ZZqYr_48LCQek55erEtoBNkqldcY09JZykexd6nrQqMjPuzT17gue-RkXd0y6aIleIxev6bCmpTNXkOw7Co-L-TWoky1yLqo85cLqjTBG9q6oTdg6MW8dLM6ejeMfT91ov9I_nmxJ2xvPokd3QerkgS2WmMK0Vgf7CxyMnyqfsMW3lNKhK23358Qh6W5Ocu_PXqjq9svC7kLw/p.jpeg It's a little hard to tell how much wear there is, but this looks like the base compound being exposed. Nothing to worry about, except that you are very near to needing to replace that tire. Background: When a tire is made, the tread rubber is extruded in a slab, cut to length, then wrapped around the uncured tire and the ends of the tread slab are spliced together to form a smooth, continuous looking tread. (Note: The tread splice is cut at about a 45° angle) It is common for the tread slab to be 2 extrusions in one: A Cap Tread (made of a good wearing rubber) over top of a Base Tread (made of a cooler running, but poorer wearing compound.) The idea is that the base shouldn't be exposed, but if it is, it will be at the end of the treadlife and not matter in the big scheme of things. Edit: Apparently, I was lucky enough to be able to see the photo before it disappeared. Thank you for the detailed info and the website on your profile is the best I've ever seen about tires: http://www.barrystiretech.com/index.html
spotrot 03/29/20 10:58am Class A Motorhomes
RE: Unusual tire wear

http://photoposting.is-great.net/?i=1 Thank you https://i.imgur.com/Z5Ct11Cl.jpg
spotrot 03/29/20 10:56am Class A Motorhomes
RE: Unusual tire wear

It's interesting that the lighter colored rubber that is exposed is on the INNER portion of the outer tread, closest to where the tread is still fairly https://previews.dropbox.com/p/thumb/AAyfnI838jlPdS64psOxY0h6ET__KKvspLOTWFYrzwQXLGHY2YbEVdK7v2cegjMRF2nZYQZ1_SbvqriMuYI5mYfkph9oQGkQCn9LrqUmRZW6PNmljqu9a20_v-NdubVLapIdqGHuqXIUoXofLGAigPsx5j4SM2XHgk51lVFQcBpH83eXqddNL7Gf9idJFbC0pkf55e_oT0Ke4IuYCnFnPgaNzTSsuxbqMse9X8NYBHxESG0hdY4nOwp-EOQkroyabwkKkhynTv6JlmnMlNa9hVxGRI7xqcwCu680Y96jgivxbOejrTM_Ced64qmCZrfyQ8nNNw9-l1NuLGJDzZdYLF1slp1MMT_ThRQqjY8wlRRGUg/p.jpeg?size=1600x1200&size_mode=3deep -- not on the outer portion of the outer tread where you'd expect the most wear.
spotrot 03/29/20 07:11am Class A Motorhomes
RE: Unusual tire wear

3rd tryhttps://ucca1f5d8dbefdec1cc8843a2f95.previews.dropboxusercontent.com/p/thumb/AAyDOSW_XGBadk5_kc3j6qHU31UNJ4aPZf5nNj1iLa5kHvIVvx-YUGoAX7qGYVWFp9VyWdDaUfMGPPrGMx2Z2LhD7Ws-AyD5Vk-WCSvdTNucUSgRwYJqijFYM7YL0tBlI6QDd4GBEx4ZZqYr_48LCQek55erEtoBNkqldcY09JZykexd6nrQqMjPuzT17gue-RkXd0y6aIleIxev6bCmpTNXkOw7Co-L-TWoky1yLqo85cLqjTBG9q6oTdg6MW8dLM6ejeMfT91ov9I_nmxJ2xvPokd3QerkgS2WmMK0Vgf7CxyMnyqfsMW3lNKhK23358Qh6W5Ocu_PXqjq9svC7kLw/p.jpeg
spotrot 03/29/20 07:01am Class A Motorhomes
RE: Unusual tire wear

https://photos.google.com/photo/AF1QipPoC4hsgmNrTY_rcPY9zk4zSoIGpLovviaz2D_e 2nd try
spotrot 03/29/20 06:59am Class A Motorhomes
RE: Unusual tire wear

The previous photos were of another members tires. I'm trying to attach photos of the tires described in this post https://photos.google.com/photo/AF1QipPoC4hsgmNrTY_rcPY9zk4zSoIGpLovviaz2D_e https://photos.google.com/search/_tra_/photo/AF1QipMsc4uFQ6kzpcoANV3k_elgLtiUTYJGUAOxyGGk
spotrot 03/29/20 06:37am Class A Motorhomes
RE: Unusual tire wear

Generally speaking, over-inflation causes the center of the tire to wear and under-inflation the outside edges. The way to get the proper inflation is to weigh the axles, preferably the individual corners. This should get you in the ballpark of the proper tire pressures. If both the inside and outside edges of the tire are worn, under-inflation is the problem. If just one edge is wearing, it is most likely an alignment problem. All accurate info. What perplexes me (and may be of use to others) is that I weighed each wheel, and then used the charts for air pressure for that size tire. In fact I actually increased the air pressure over what the charts recommended but the tires still wore much faster on the outer treads. My guess: the chart was wrong or this particular tire construction makes the outer tread wear down prematurely First, with regard to evenness of tire wear vs inflation pressure, there are forces at work that are stronger. For example, steer tires tend to wear in the shoulders and drive tires tend to wear in the center. This effect is on the order of 3 times stronger than the effect inflation pressure has. And lastly, the charts aren't wrong. Those charts are generic in nature. That is, they are published by a tire standardizing organization and are used by EVERY tire manufacturer when designing tires! Plus, they are MINIMUMS, not recommendations. You should be inflating the tire MORE than what the actual weight/chart says. In fact most vehicle manufacturers add about 15% to the max load to get the specified inflation pressure - and the tire manufacturers know that, so they take that into account when designing tires. In theory, then, if you used the actual weights and the chart to set the tire pressures, the tires are going to wear like they are underinflated - and still, the effect wheel position has will be overwhelming. Thank you for the comment - very interesting. My take-away from that is to inflate the tires substantially more than the chart and then rotate the tires from front to back. It is still surprising to me that while all of six tires measure 13/32s on all four tread grooves, the steer tires have just the edges of the outer tread significantly scrubbed off, particularly the left outer on one and the right inner on the other. Perhaps those 2 long drive days fighting a very strong cross wind did that damage.
spotrot 03/27/20 07:20am Class A Motorhomes
RE: Unusual tire wear

Generally speaking, over-inflation causes the center of the tire to wear and under-inflation the outside edges. The way to get the proper inflation is to weigh the axles, preferably the individual corners. This should get you in the ballpark of the proper tire pressures. If both the inside and outside edges of the tire are worn, under-inflation is the problem. If just one edge is wearing, it is most likely an alignment problem. All accurate info. What perplexes me (and may be of use to others) is that I weighed each wheel, and then used the charts for air pressure for that size tire. In fact I actually increased the air pressure over what the charts recommended but the tires still wore much faster on the outer treads. My guess: the chart was wrong or this particular tire construction makes the outer tread wear down prematurely
spotrot 03/26/20 08:33am Class A Motorhomes
RE: Unusual tire wear

My experience over the years is that the F53 chassis RVs drive much better if the toe-in is set at the maximum positive value in the manual. Affected much less by wind/passing trucks. Much less steering corrections needed. The downside is I have always experienced outer edge tire wear when I have the shop make sure that is what the setting is. Have had a couple RVs in the past that when I got them required a lot of correction going down the road. When checked, one had zero toe-in, the other had been slightly negative. When the tech set them to the high end of the manual value, they drove far better. We always get around 50-55K miles out of rear tires, the fronts I'll change out at 40K due to outer edge wear. I'll swap some tire wear for more relaxed driving any day. I'm guessing your RV tracks like a railroad locomotive going down the road. This is, of course, assuming that the front end is tight and you keep everything properly greased. I'm a firm believer in chassis lubricating at every oil change. I don't think you could possibly wear out the front end on an F53 if you do that. The coach body would turn to dust first. Thank you to all who commented and I especially appreciate the info re toe on F53 RVs - that kind of info is only available from experienced RVers. The actual stock weight on the front tires of this 30' RV is less than the any value on the weight/tire pressure chart for these 19.5 tires. I think the chart was wrong because the tread wear indicates wear would have been more even if the pressure was always 100 psi or more,
spotrot 03/26/20 07:15am Class A Motorhomes
RE: Unusual tire wear

Thanks for the replies Camber and toe are good When the tires were new, we had to drive westward for 2 days with unrelenting 30 mph cross winds - that took a fair amount off the outer treads. Other than that trial, no suspension issues. I just wanted to make sure that what I'm seeing is not a different rubber layer just above the cord. And wanted to know if there was a particular issue with those tires.
spotrot 03/25/20 09:14pm Class A Motorhomes
Unusual tire wear

The outer treads on my steer tires have apparently worn to enough to expose a different rubber compound. I wondered if anyone else has experienced this. The rest of the tread is excellent. The tires are 245/70R19.5 Bridgestone R250 and according to the charts have been over inflated if anything at 90 psi on a light front end (in spite of the relative heavy wear on the outer treads). Bridgestone CS had no useful info, just said to take it to Larry, Curly and Mo at my local tire dealer for inspection. Thanks John I'd post a photo if I knew how
spotrot 03/25/20 08:28pm Class A Motorhomes
RE: fitting on water tank

Hi Rick, Ditto: "no way we would've been able to enjoy the RV lifestyle the way we have if we had to rely on dealers and paid mechanics." 2 items possibly of interest: Battery-powered leak detectors cost as little as $30 and may be worthwhile if a system's leak could cause problems that are expensive to repair (even in a house or condo) The Shurflo (pump) tech people were very helpful in determining the new replacement pump. Cost $57 on ebay John
spotrot 02/19/20 07:20am Class A Motorhomes
RE: fitting on water tank

I used a hair dryer to heat the plastic pipe for a couple minutes and it came out. It was good that I removed the water tank, the clear plastic covering, the carpet and the foam pad because the plywood underneath was soaked. I haven't decided if I will reinstall the carpet under the tank, It may be better to let the plywood continue to dry. I will install a plastic tray under the water pump however to catch any drips if it leaks again. Lucky I discovered the leaky pump in time and did the work myself. It would have been very pricey to do all this at a RV dealer. Thanks for the comment.
spotrot 02/17/20 07:07pm Class A Motorhomes
fitting on water tank

I need to remove the water tank on my 2008 Itasca. All set to go but the plastic fill pipe will not pull out after removing the nut. The pipe turns but will not pull out of its fitting. I don't want to break anything and create a bigger problem. Anyone with experience on this? Thanks
spotrot 02/16/20 05:56pm Class A Motorhomes
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