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Topic: Tires (Read 11355 times) previous topic - next topic

Re: Tires

Reply #180 –
Counterpoint:  If the tires are to be used only on an RV, you actually are better off with the LEAST deep tread in an all wheel position tire.  Less tread= less squirm, slightly better MPG, slightly better handling.

As stated, you will never wear out the tread on any RV tire.

Re: Tires

Reply #181 –
Brett
Tire tech echoed your advice also advised that the 177 had an extra groove near the edge to disapate heat !!

Re: Tires

Reply #182 –
We put this group of four new Continentals on this month before we took our last 2,500 mile trip, arriving home yesterday. I took these shots from the right rear tire. What is happening? Other outside tire is as new. We have no recall of a road hazard or scrubbing event. Sheesh. Thanks. Paul

Re: Tires

Reply #183 –
Defective tire

Unless the inside dual is smaller?  Putting the load on the outside.

Inner underinflated?

Re: Tires

Reply #184 –
Check your air pressure But it looks like the sidewall was scrubbing something. look up in the fender and see if you see any rubber where is might have scrubbed or fresh scratches etc. Check your level system to make sure that side is going to ride height correctly with other 3 sides. Only other thing I can think of is you picked up a piece of a shredded tire laying in the road and it somehow kicked up and got hung up in there and scrubbed the sidewall with the exposed steel belts and cords. the steel is like razor blades and can work over a tire.

Re: Tires

Reply #185 –
3rd picture definitely shows scrubbing against something. 2nd picture shows that scrubbing only went halfway up the sidewall. You hit something, likely a curb or similar object.    Looks like it's just scuffing/minor cut on the surface though.

Re: Tires

Reply #186 –
You can see circular scratch marks mixed in with the gashes. Some kind of road gator would be my best guess as Stump says. Take a close look at the rubber scratches leading away in a circular pattern from the cracks in all three photos. This would indicate that while the main part of the debris dug into the sidewall, it twisted at the same time leaving the small marks. Only took one hundredth of a second. Probably caught for an instant between the Fiberglas and the tire. Number one on my list would be the steel/rubber remnants from someone's blowout. Get the tire dealer to look at it right away. Do you have road hazard on the tires?

This is why you can never be too confident that your "brand new" tires are going to somehow make your trip safe. Chances are you won't even see what some car or truck dropped until you have a blowout. If you're really speeding or had that margarita before stopping for the night, you are not going to have as much time to react.

Pierce

Re: Tires

Reply #187 –
  Looking @ photo # 1 it appears that maybe the problem is the manufacture. From what I can see, the tire cap/camelback was a little small or when the tire went in the mold for shaping and curing it was slightly under inflated.

Re: Tires

Reply #188 –
From a tire engineer's standpoint, I agree with those that correctly identified sidewall abrasion or more specifically "curbing".
The evidence and clues are:
Discoloration of upper portion of the sidewall. Darker color is the norm for rubber abrasion
Small "flaps" of rubber where cutting occurred
Radial scrape marks

Further examination of the tire sidewall could reveal if this is a single occurrence or something that has happened a number of times over past 2500 miles.

RR outer is also a clue as it is much easier to cut a curb on right side than on the driver side. The fact that the driver doesn't remember the event is not surprising as I don't think the RV climbed the curb and dropped off but the side of the tire was run against a rough edge of a curb.

Not a "defective" tire as there are no junctions of tire components that would result in the above conditions.

Re: Tires

Reply #189 –
I reached out to a retired tire forensic engineer who is on the FMCA Technical Advisory Committee with me.

His post is immediately above.

Re: Tires

Reply #190 –
Getting back to the Toyos,their website calls the M170 a "urban" tire,whatever that exactly means.

Re: Tires

Reply #191 –
Urban tire was explained to me as designed for high scrub ( lots of turns) not for prolonged high speed high temp interstate driving

Re: Tires

Reply #192 –
I found the chart on pg 2 of the Bridgestone data book]  has a nice comparison or the various terms "Long Haul...Local delivery etc.

Note the download is a PDF with two pages of the data book per PDF page

Re: Tires

Reply #193 –
I had Toyo 154s on my previous FT and liked them.  I am getting ready to order set of 6 new tires for our current FT

M154  vs M170 ....... M154 maybe slightly better for steer position but perhaps not that much difference.  Has anyone drove few thousand miles with Toyo M170 in steer position ?  I am thinking to get M170s this time.

Thank you,
AL

Re: Tires

Reply #194 –
I have Toyo M177 and like them very much.  They seem to be a very good hi-way tire in all positions.

John

Re: Tires

Reply #195 –
Just put on 6 Toyo M154s, but no experience with them yet (they were fine driving 20 miles back from the tire dealer  :) ).  Will report back when we move north.

Re: Tires

Reply #196 –
I posted a few pics of a nearly-new Continental tire in this thread a while back. Today, our Michelin factory rep looked at the rear right and confirmed the other experts: "curbing by owner". Light swirls showing rotation, color difference. No damage beyond cosmetic nor a need to replace.

Thanks for the help in diagnosing the deal.

Re: Tires

Reply #197 –
Thought about this thread today driving home from coronado, ca to San Juan Capistrano.

We were camping there and we were helping a fifty year buddy with their new to them fiesta lx'er.

As part of the conversation about coaches we decided to check his tire pressures. 

After adjusting his we decided to check mine.  Been months.  Shame on me.

Ok fronts had gone from 100 to 92.

Rears from 90 to 84. 

Hmmm.  Been noticing some steering wander and a slight dead spot.  I mean slight. 

The Michelin chart for xza-3+'s at our exact weight was 97/87.

Ok versus 100/90 or the bad 92/84 I went with the chart.

Wow.  Perfect ride.  Steering, turning. No sharp edge feedback.

Five pounds under was very noticeable as was three over.

Fully loaded 97 u320 with LRH's

What a pleasure to drive.

The fsd shocks, centrimatics, everything correct underneath, correct air pressure  resulted in one of the best drives I have ever experienced. 

Driven hundreds of coaches over time. 

I seriously hope that the other brands mentioned have a similar experience.

Bottom of wheel stuff.  Absolutely straight in the lane,  tiny pressure to correct my line.....no dead spot

Just wanted to report what I experienced. If I was selling this coach today which I am not this would be a money making setup.

Yours may drive exactly the same but I doubt it's better

Re: Tires

Reply #198 –
Update on my M170 Toyo.

So far, I really think this is a very stable tire. With that said I only have two thousand miles on them so can't speak to wear and such. I do notice that both steer tires are losing about ten pounds per side in the time span of three weeks. Has anyone else run into this problem of losing air in their Toyo Tires?

Re: Tires

Reply #199 –
I highly doubt it to be a toyo problem and more likely you should go back to supplier and have them reset and or new seals on valves/rim joint.
JohnH