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My bike tracs perfectly but if I make a right or left turn I feel a new vibration. When I brought it in to the Honda dealership to have it looked at the "Goldwing Specialist" mechanic took it for a ride. His diagnosis was that the front Dunlop D250 that had come stock on the bike was cupping causing this condition. The bike has 8500 origional miles on it. He said the D250s were not a great tire and this was normal at this mileage. He also said that if I go to Dunlop Elites at a cost of $450.00 for both installed, I should get 12,000 to 14,000 miles normal wear on them. Does this sound normal and real to all of you experts? Please advise, Thanks, Greg
 

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Sounds like a right explanation for the vibration on turning. As far as tire replacement, I wouldn't worry about it til they are worn out. Maybe they are now, or maybe you can get a lot more out of them. Brand choice is up to you. Personally, I like the Metzelers. Good luck.
 

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JMO

I would forget the lops and go with stones. Search some tire threads here and find a conclusion you are happy with. I would also purchase the tires yourself and find a good wrench that will swap and balance them for you at a decent price.

Again. JMO
 

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Well Greg, I hate to break the news to you but...he's right on the money. The sad part is that your brand and model of tire are not the only ones to do this. Any tire, regardless of make or model, will wear down with time with cupping being a very typical wear pattern. If you have been remiss at keeping tire pressure up where it belongs, the wear pattern is more pronounced. The more cupped the louder they sing in the curves. Unfortunately, it's a fact of life to contend with. Some tires hum a happy tune till the end and some keep your attention with a loud song. Just keep your pressures proper and continue monitoring their wear.

Hope that helps calm your thoughts.
 

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Discussion Starter #5
Are you saying not to change them now even though there is cupping and wait for them to be completely worn? By the way, where is a good place to buy the tires if I can find a local wrench and what could I hope to save?? Thanks, Greg
 

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Just keep riding them down to the wear bars. Straight line riding will cause them to cup sooner. They all do it. I like bridgestones, less mileage but a little more stick in the rain. Check with a local mechanic before buying the tires. Many will change the tire only if you buy it from them.
 

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KZ said:
If you have been remiss at keeping tire pressure up where it belongs, the wear pattern is more pronounced.
For the new guy, could you comment further on what the pressure should be with the stock D250s? It sounds like folks are recommending higher front tire pressure than the 36 psi recommended by Honda.

I'm sure this has been beaten to death but I had trouble finding what I needed with the search function. Is it me or is the search function on this forum a little weak..?
 

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StevieMac said:
KZ said:
If you have been remiss at keeping tire pressure up where it belongs, the wear pattern is more pronounced.
For the new guy, could you comment further on what the pressure should be with the stock D250s? It sounds like folks are recommending higher front tire pressure than the 36 psi recommended by Honda.

I'm sure this has been beaten to death but I had trouble finding what I needed with the search function. Is it me or is the search function on this forum a little weak..?
Never mind, I found what I was looking for. I'm going to try running 40/42 for a while. My bike is brand new and thankfully has no wobble (yet). Just trying to avoid the tire cupping problem somewhat.
 

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Yes, the cupping is common with the stock tire at even less than 8,500 miles and the cupping is causing the vibration. Seems the most popular tire on this forum is the Bridgestone.
 

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Discussion Starter #10
Another really strange thing is that since the front tire has started cupping I now feel the lines in the road much more. You know, the lines were two areas of pavement meet. When I first got the bike I was so impressed that I didn't have a getting caught in that line feeling. Now it is very prevelent, hopefully with new rubber that feeling will go away once again. Thanks for the great info, you guys are awesome. Greg
 
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StevieMac said:
KZ said:
If you have been remiss at keeping tire pressure up where it belongs, the wear pattern is more pronounced.
For the new guy, could you comment further on what the pressure should be with the stock D250s? It sounds like folks are recommending higher front tire pressure than the 36 psi recommended by Honda.

I'm sure this has been beaten to death but I had trouble finding what I needed with the search function. Is it me or is the search function on this forum a little weak..?
This is a survey that I posted well over a year ago. I think it has some interesting results. Read it and draw your own conclusions. I used the search to find it in one try.

http://www.gl1800riders.com/forums/view ... ght=survey
 

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I also have about 7500 miles on my '05. Have noticed more this past weekend from a ride up to Tahoe that my front dunlop is cupping and singing in the turns. Have done the Vegas run a couple times from Reno. The straight riding is the culprit. Have always ran the recommended air pressure. Not sure what tire I will go with next. Also, the rain grooves in the cement highways up and down I80 really like to grab the front tire and make it feel squirmy. But have gotten used to it.
 

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Actually, crappy Honda stock suspension is the real cupping culprit here..

I'm sure this has been beaten to death a hundred times, but here we go...:popcorn:

Between the wimpy steering stem bearings and non-symetrical damper rod / cartridge forks with undersized springs, there really isn't a lot of control over the front end. And if the front end is pitiful, the rear shock / spring setup is much worse.

I have E-3's, about 12-13000 miles on them. (wasn't smart enough to record the mileage this time...) I run 38 F 41 R. I have Progressive Springs, All Balls, and Gold Valves up front. The front tire shows no cupping whatsoever. The rear is showing some cupping, and is starting to sing in the turns pretty good. I have a Progressive shock and spring back there, with about 25K miles on them. I have noticed that the shock is shot. I am quite disapointed that the shock didn't last very long. I would have expected it to last much longer. And Progressive was less than helpful. Sorry to ramble...

My point here is that, just like on your car, worn shocks will cause tire cupping. My bike is brand new, my shock and forks aren't worn, you say, and I still get cupping. Actually, your shock and forks have such poor damping that they are effectively worn out the day you drive off the showroom floor. Add stem bearings lifted directly from a bicycle and springs from the 250CC / 350CC parts bin along with the loading that Wingers typically employ, and you have the perfect storm of tire cupping.

There are a number of valid solutions here that can be employed here, along with a liberal application of money. It's really too bad that Honda chose to try for the '59 Caddy plush billowy ride on what is kind of a sport bike with bags. Roller bearings in the steering stem would have changed the manufacturing costs by a yen or so, if that. More suitable springs would have meant they could have left off the Anti-dive, which would have meant that they could have used cartridges on both side instead of a damper rod on the left, which would have cost them less to manufacture.

End of rant... YMMV

Edit.. To answer your original questions, yes. The orignal tires are good for maybe 12K miles, and you will see cupping because of the crappy suspension. $450 sounds like a reasonably fair price for a set of E-3's installed ( I paid my local non-dealer guy $460 installed, mounted, balanced). You might be able to do better by buying from the internet (our host here, for instance) but you still would need to find someone to mount them. I compete with internet suppliers, and I'm really not too inclined to help someone with service or technical issues for products they bought elsewhere. If I charge a customer $200 / hour for large format printer service, the guy who knows me and has chosen not to buy supplies from me pays more, believe me. So anyone who is willing to mount tires purchased elsewhere might charge enough more and wipe out any savings you achieved. Or not. Customer loyalty is big in my book. I have no problem if you buy elsewhere and can handle your own issues. Buy whatever, whereever you want. Just don't expect me to solve your technical issues with product you didn't ask my advice on and buy from me. Get the guy you bought it from to solve your problem with it. Sorry, this just seems to be my morning to rant and rave. Your experience may be different.

Next edit to answer original questions.. I get around 17K out of my Dunlops. The wear bars are starting to show about then. So it sounds like your Honda dealership is giving you the straight poop and treating you fairly. The 12-14K mile estimate on the tires means that if you get 15-17 you'll be really happy, and even if you only get 12K you haven't been over-promised, so you'll still be happy.

You don't mention where you are located.. (always on the lookout for an honest dealer..)

Dave
GWBBA #9
rocketmoto.com
 

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My bike tracs perfectly but if I make a right or left turn I feel a new vibration. When I brought it in to the Honda dealership to have it looked at the "Goldwing Specialist" mechanic took it for a ride. His diagnosis was that the front Dunlop D250 that had come stock on the bike was cupping causing this condition. The bike has 8500 origional miles on it. He said the D250s were not a great tire and this was normal at this mileage. He also said that if I go to Dunlop Elites at a cost of $450.00 for both installed, I should get 12,000 to 14,000 miles normal wear on them. Does this sound normal and real to all of you experts? Please advise, Thanks, Greg
I have the same vibration you are experiencing, and I agree that it is the cupping of the tires. I have e-mailed Dunlop Corporate office and am waiting on a reply. My tires are checked for proper "psi" before every ride, and mine started cupping at less than 4000 miles. Since I'm not in a position to shell out $$$ for new tires, I will just grin and bear it until they are worn out. I will not be installing Dunlops as replacements, that I can promise you.
 

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With the oem suspension most tires cup at 8K.

On tires when the Dunflop Elite 3s first came out they were the best and the Stones stunk now many think the Flops are stinko. I use Metzlers
 
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