I'm going to put on 6 new Double Coin tires. Just got a price from a local tire shop for $2650, out the door. 315/80R/22.5 and 20 Ply. Anyone using these and do you like them? Also, what can I expect in return for the existing tires that are in decent shape.....just ballpark? When I asked about the date of tires, he said that some people let them cure if they are really new. Cure....as in let them sit a period of time before putting them. He's been in the business for a long time and in his opinion, they last longer? http://www.doublecointires.com/tire/rr680/ (http://www.doublecointires.com/tire/rr680/)
Thanks
Those take a 9 in wide wheel for mounting are your wheels 9 in or 8- 1/4 wide they ride like log wagon on 8-1/4 wheels btdt
Quote from: luvrbus on March 25, 2016, 04:31:07 PM
Those take a 9 in wide wheel for mounting are your wheels 9 in or 8- 1/4 wide they ride like log wagon on 8-1/4 wheels btdt
How can I tell? Here are a couple pics of the existing tires. https://goo.gl/photos/DdT7BHTgQG89AfGC6
The width and carrying weight will be stamped on the wheel,a common mistake people make in buying tires is that tires are rated for more carrying weight than the wheels it's kinda a of waste of monies.IMO you are buying too much tire for a MCI 7
Brett-the 315/80R-22.5 20ply can have two ratings. 18,000lbs for high speed (over 65mph) and 20,000lbs for under 65mph on the steer axle. Way too much rating for your bus. This is why the 12R-22.5 is still being made. I would guess you don't even need the 12R's. If it were me-I'd switch to 11R-22.5's since they are very common in the trucking industry. The 12R is a 485rpm tire, and the 11R is a 500rpm tire. So if you're turning 1800 rpm at cruise, at the same speed you'd be turning 1856rpm. The best answer to what tire you should be using is to weigh your bus with all tanks full.
Double Coin tires are one of the better Chinese tires. Good Luck, TomC
They used to make a tread pattern just like the Michelin xza but don't offer it anymore. That 20 ply is going to ride rougher than a 12,14,or 16 ply.
If he doesn't have the 9 in wide wheels the sidewalls will rub on that tire BTDT,it's not a bad tire, it is acutely 20 ply rated not 20 plys still way to much tire for a MCI 7
I have never used Double Coin tires on my trucks because I have heard too many negative comments from other drivers who did try them about separations and difficult balancing. Tire dealers that do retreading do not often accept them for retreading, which is a real sign of lesser quality. When I ran dump trucks decades ago, I went through a lot of tires. The Michelin casings would be accepted 3-5 times for retreading; other brands 1-3 times. I just put 8 Dunlop SP160's 11:00R X 24.5 tires (H rated) on my Eagle 10 for about $3800. I do not expect to worry about them for the next 8 -10 years. If you buy Double Coins, your experience might be different.
Michelin makes around 50 different models of tires for trucks and buses. Double Coin-maybe a dozen. I use Michelin on all my vehicles with never a problem. You can have problems with any tire. The ride, traction and wear (I just had 2 new rear tires on my car that had 75,000 miles on them), is second to none. My opinion-the best traction tire is the Michelin XDN2. But it is also very expensive. Good Luck, TomC
Hi all;
I just changed all the tires on my MC-7. (january) I know the 315/80 22.5 is more tire
than I need. But I noticed some newer coaches are running this size and there must be
a good reason. For me, it gives me a warm fuzzy feeling that I will not have any tire
problems. Also I found that 315/80 22.5 is easer to find than the 12r 22.5. I put
new tires on the front and used tires on the rear. The used tires are less than 2yrs old.
So far, I don't think the ride is too bad.
Merle
I put Double Coin tires on a previous coach and ran them for five years before selling the coach.
I loved them. They rode well. Unlike my experience with Michelins which tend to ride like rocks as they age the Double Coin rode smooth and nice the entire time. My drive wheels were a 9" aluminum outer wheel and an 8.25 inner wheel. Wheel width was not an issue. For the axle weight I just used the tire pressure specified in the Michelin pressure chart and never had an issue.
Double Coin is partially owned by Michelin. I would use them again. I have the need for tires coming up next year and they will be one of the tires I will shop.
Michelin went into a joint venture with Double Coin on a particular tire series, not the whole company.
http://www.ccjdigital.com/double-coin-parent-michelin-team-to-produce-warrior-brand-tires/ (http://www.ccjdigital.com/double-coin-parent-michelin-team-to-produce-warrior-brand-tires/)
Dang, I thought this would be straightforward. Guess not. I've currently got the Firestone FS400 on it right now. They are a sharp looking tire but expensive. I don't want to spend that much. http://simpletire.com/firestone-315-80r22.5-240623-tires (http://simpletire.com/firestone-315-80r22.5-240623-tires)
I agree that Michelin is a great tire ,but my point is why spend all that money for tires that are going to rot off before they are half wore out.If I was running trucks or buses that stayed on the road all the time ,I too would probably run Michelin's but on my Motor Home ,I had six Sailun tires installed and I am well pleased so far .They ride as good as the Michelin's that came off it.They also have a buy back program.Acording to the tire shop that I bought my tires from,a lot of the commercial operators are using these tires right now .I had the 315/80 22.5 put on mine just because that was what was on mine but the 12R 22.5 w0uld have worked.Both these tire sizes require a 9" rim.The 315's were the same price as what you were quoted but the 12 r's are about thirty five dollars less per tire .I used Snider Tire for mine.
The most important aspect to getting a good ride is the tire inflation. Do not run maximum tire pressure that is listed on the side of the tire-you're bus will ride like a forklift. Use the tire inflation guide for your tire by your tire manufacturer by the weight of each axle for proper inflation. For instance on my Michelin XZE 11R-24.5 H rated (16ply), the maximum inflation is 120psi. At that inflation, the tires can support 14,320lbs front, 26,440lbs drive axle. Way too much for my weight. My bus weighs 10,500lbs front, 20,500lbs rear. The inflation table says 80psi at 10,620lbs for front and 85psi at 21,040lbs for rear. Hence I bump it up a bit and run 90psi all around for ease of checking and having a bit of a safety margin. My bus rides very well-I know better than GMC transit (not RTS). Good Luck, TomC
Quote from: TomC on March 26, 2016, 08:09:41 AM
The most important aspect to getting a good ride is the tire inflation. Do not run maximum tire pressure that is listed on the side of the tire-you're bus will ride like a forklift. Use the tire inflation guide for your tire by your tire manufacturer by the weight of each axle for proper inflation. For instance on my Michelin XZE 11R-24.5 H rated (16ply), the maximum inflation is 120psi. At that inflation, the tires can support 14,320lbs front, 26,440lbs drive axle. Way too much for my weight. My bus weighs 10,500lbs front, 20,500lbs rear. The inflation table says 80psi at 10,620lbs for front and 85psi at 21,040lbs for rear. Hence I bump it up a bit and run 90psi all around for ease of checking and having a bit of a safety margin. My bus rides very well-I know better than GMC transit (not RTS). Good Luck, TomC
Thanks Tom
Quote from: DoubleEagle on March 25, 2016, 08:13:17 PM
I have never used Double Coin tires on my trucks because I have heard too many negative comments from other drivers who did try them about separations and difficult balancing. Tire dealers that do retreading do not often accept them for retreading, which is a real sign of lesser quality. When I ran dump trucks decades ago, I went through a lot of tires. The Michelin casings would be accepted 3-5 times for retreading; other brands 1-3 times. I just put 8 Dunlop SP160's 11:00R X 24.5 tires (H rated) on my Eagle 10 for about $3800. I do not expect to worry about them for the next 8 -10 years. If you buy Double Coins, your experience might be different.
Meh, thats not true here. DC have the excellent casings and are very welcome. Funny, when we ran dump truck and dump trailers, Michelin were the worst things we ran. We swapped them all out for Toyo and never looked back.
I have DC steers and I love them. Reason I went with them is when the ND boom hit here, everyone and his brother that had a truck headed that way. Of course before they left they all needed tires and DC's were recommended. Been a good experience all around from all of them.
Thats my story anyways.
Quote from: opus on March 26, 2016, 08:47:46 AM
Meh, thats not true here. DC have the excellent casings and are very welcome. Funny, when we ran dump truck and dump trailers, Michelin were the worst things we ran. We swapped them all out for Toyo and never looked back.
I have DC steers and I love them. Reason I went with them is when the ND boom hit here, everyone and his brother that had a truck headed that way. Of course before they left they all needed tires and DC's were recommended. Been a good experience all around from all of them.
Thats my story anyways.
If Double Coins turn out to be decent at a good price, that would be nice, we need lower prices on these tires. Once a stable history develops for Double Coin they might be worth considering. My experience with Michelins on dump trucks was back in the eighties in the Northeast with highway use, if some had a less than great experience with them it might have related to sidewall injuries as that seemed to be their weak point. Back when I used them heavily in the eighties, new ones went on the front, and Bandag recapped them for the rear along with Toyo's or Bridgestones that they had as casings. Once Bandag accepted the casing, they guaranteed them, but for our buses I think virgin rubber is in order because time will kill them before we grind the rubber off.
When it comes to tire pressure levels, another source of opinion is the vehicle manufacturer. My 1984 Eagle VIN plate recommends 105 psi for the front axle, and 90 psi for the bogies and the rear. I assume those levels are recommended for quality of ride and steering geometry. My coach was originally an entertainer, the pressures might be different for a seated bus.
I know the revolutions will be a little off but on the drives could you not change to a 11 r 22.5 as they are a lot less money then the 315 80 r 22.5 and it might help with the over all get up and go
dave
I have been buying DC tires for use on the semi trailers in the fleet that I manage when I run short of tires to cap coming from the power units. They have done a good job for us. I don't look to buy a top end casing for the trailers as our trailer tires usually die from age issues, kind of like RV coach use. I have capped a few DC 1 cap and they are still doing OK. Les Schwab handles them out in the NW so access to them on the road is good in this area. I tried a couple of the Road Lux tires and was disappointed with the wear / low mileage I got from them. This was two years ago. At that time DC had a better warranty and was only a few dollars more. The Road Lux casings seemed to be alright thou as I capped them and am getting better mileage out of the cap (margoni ring tread). I buy Toyo's for the tractors and have good service from them. I have run Goodyear's, Dunlop's and Toyo's on the steer axles with the Toyo's doing every bit as good. I have settled on a Toyo drive axle tire that is actually out performing the GY and Dunlop's I have tried. We Gross 105,500 so drive tires really get tested for wear characteristics of the rubber compound. I run Counteract balancing beads in the tires and have had good success with the product as opposed to conventional balancing. Also usually costs significantly less than conventional balancing and you never have to rebalance. Happy Tire Hunting. ;)
You could look into Michelin or Bandag recaps for the drive tires to save some money.
I have said this over and over if the tires have a DOT number try it if the price is right one never knows,my personal preference are Toyo tires
Quote from: easystreet on March 26, 2016, 11:19:32 PM
I have been buying DC tires for use on the semi trailers in the fleet that I manage when I run short of tires to cap coming from the power units. They have done a good job for us. I don't look to buy a top end casing for the trailers as our trailer tires usually die from age issues, kind of like RV coach use. I have capped a few DC 1 cap and they are still doing OK. Les Schwab handles them out in the NW so access to them on the road is good in this area. I tried a couple of the Road Lux tires and was disappointed with the wear / low mileage I got from them. This was two years ago. At that time DC had a better warranty and was only a few dollars more. The Road Lux casings seemed to be alright thou as I capped them and am getting better mileage out of the cap (margoni ring tread). I buy Toyo's for the tractors and have good service from them. I have run Goodyear's, Dunlop's and Toyo's on the steer axles with the Toyo's doing every bit as good. I have settled on a Toyo drive axle tire that is actually out performing the GY and Dunlop's I have tried. We Gross 105,500 so drive tires really get tested for wear characteristics of the rubber compound. I run Counteract balancing beads in the tires and have had good success with the product as opposed to conventional balancing. Also usually costs significantly less than conventional balancing and you never have to rebalance. Happy Tire Hunting. ;)
Thanks
Got the 6 new Gladiator tires put on yesterday. An added bonus that I didn't expect is that it tracks so much better down the road. There was a ton of play in the steering wheel and up until now it took a lot of correction to stay between the lines. Realize this is the first set of new tires I've had since owning it so I didn't know any better. Here are some pics. The tread is quite aggressive.
https://goo.gl/photos/aYL8Hv7qpUvWrT5C6
Truck/bus tires are so much more than just a pretty looking tread design. Michelin makes over 50 models of truck and bus tires-for a good reason. Michelin has the exact rubber compound, tread design, ply design and strength for exactly the use you want the vehicle to do. Chinese tires are "me too" tires. They copy the tread of many manufacturers, you don't know the rubber compound-if it is correct for buses or on highway or off highway. While yes they may have a DOT number on the side, just the design of the tire can make up to and sometimes over a mile to the gallon difference. And that tread design can make the difference of your bus stopping in time, or the tires loosing traction and skidding into that vehicle in front of you. The only place I would run a Chinese tire would be on the trailer of a big rig. Good Luck, TomC
One more on tire inflation-the suggested tire inflation on the serial number plate on your bus is what the tires will support at maximum weight that the bus is rated (GVW). As said many times before, weigh your bus at a truck stop with each axle weight when the bus is at it's heaviest-typically full tanks and people inside. Then you can go on the tire inflation tables of your tire manufacturer and get the exact pressure to run the tires at. Typically 5-10psi higher in summer is suggested. Good Luck, TomC
Quote from: TomC on May 07, 2016, 06:48:41 AM
Truck/bus tires are so much more than just a pretty looking tread design. Michelin makes over 50 models of truck and bus tires-for a good reason. Michelin has the exact rubber compound, tread design, ply design and strength for exactly the use you want the vehicle to do. Chinese tires are "me too" tires. They copy the tread of many manufacturers, you don't know the rubber compound-if it is correct for buses or on highway or off highway. While yes they may have a DOT number on the side, just the design of the tire can make up to and sometimes over a mile to the gallon difference. And that tread design can make the difference of your bus stopping in time, or the tires loosing traction and skidding into that vehicle in front of you. The only place I would run a Chinese tire would be on the trailer of a big rig. Good Luck, TomC
I agree, but I am not sure I would put them on trailers. I would be curious to see the accident statistics for buses and trucks in China related to tire failures and whether the more astute Chinese truckers use non-Chinese tires on their rigs. It is probably a government secret.