So, I've got a Dunlop Qualifier on the rear. This is the 2nd that wore this way. If you were on the WV trip, you might have seen how my Diablo rear wore. I had chalked that up to riding hard 2-up, but the Qualifier is doing the same thing.

Here's a pic, but it's hard to tell. The leading edge of the tread groove is worn almost flat with the bottom of the groove. You can see where it's worn to almost nothing near the point of the blue arrow. This happens on both sides

Now, look at the trailing edge of the groove. It's still almost the height the unworn tire was. It even makes a lip, you can see near the point of the red arrow.

So... What makes my tires wear like this? The Diablo was the same pattern, but even more noticable ~

Pic:


Thanks!

JM

How many miles on that tire, and what pressure do you run?

About 2000 miles on the tire, 36psi

JM

I've seen that kind of wear, but not to that degree.

Not at all sure why it happens.

I run Bridgestone BT016's at about 38 PSI, they do the same thing, the BT015's did the same and the OEM BT 014's also did it.

I've never understood something with the BT016 rear, after a hard morning of riding up the range, when I get home on the softest part of the tyre there is balled up strips of rubber on the outer most edge of the tyre tread.

Mind you can't complain about the performance, awesome tyres! 

Quote from: CairnsDuc on October 22, 2008, 01:21:02 PM
I run Bridgestone BT016's at about 38 PSI, they do the same thing, the BT015's did the same and the OEM BT 014's also did it.

I've never understood something with the BT016 rear, after a hard morning of riding up the range, when I get home on the softest part of the tyre there is balled up strips of rubber on the outer most edge of the tyre tread.

Mind you can't complain about the performance, awesome tyres! 

You're joking about not understanding that, right?

And if you're riding that hard, 38 psi is very high.

Sorry, should have specified that better, The other BT's I've had on the Monster never did it at all, now the new Tyre does it a lot. Also helps I have redone the suspension so I am exploring the limits of the tyre a lot more than I ever did/could. very thin chicken strips on my rear tyre!  [moto]

Maybe I was riding like a little pregnant dog on the older tyres 

I run 38 PSI because the guy who fitted the tyre suggested that because 90%+ of my riding is commuting.

The older BT015 he said liked 36 PSI, but he has found the 016 seems to prefer 38, and after about 2K of riding, so far, they have been an excellent tyre 

JM...

you need more rebound damping

Notice the wear is on the decel side of the tread. I had the same type of wear on my Pilots after a couple track days as I started to ride more aggressively. Figured it was from deceling (letting off the gas) on setup and through the corners.  Have you changed your riding style? Does it appear on both side of the tire?  Did you do any track days?  Maybe the tire rubber is softer on the edges or it was over inflated causing less contact patch?

There's a simple answer to this problem..dunlop qualifiers suck..I had these ony my bike and they did the same thing. I had a pilot power and it never did this. I now I have BT-21's and they dont do it either. My riding style hasnt changed but my tire selection definitely has. Be careful, after a while your rear will destabilze at that location and you'll feel your bike squirm as you enter a turn..

To summarize: Qualifiers SUCK.

Quote from: EEL on October 22, 2008, 05:09:35 PM
There's a simple answer to this problem..dunlop qualifiers suck..I had these ony my bike and they did the same thing. I had a pilot power and it never did this. I now I have BT-21's and they dont do it either. My riding style hasnt changed but my tire selection definitely has. Be careful, after a while your rear will destabilze at that location and you'll feel your bike squirm as you enter a turn..

To summarize: Qualifiers SUCK.

He said his Diablo did it to.  So do those suck as well?

Quote from: ducpainter on October 22, 2008, 04:41:09 PM
JM...

you need more rebound damping

And don't think DP said this just for shits and giggles.  It is almost like he knows why the tire is wearing like that.

You mean something like this D208?




The Dunlops are the absolute worse at doing this out of the tires that my wife and I have run. The Diablos will not do it on this bike....only the Dunslops. The above tire from a 1994 GSX-750R running 36 psi. That tire had less than 300 miles (yes, three hundred) on it when that picture was taken....BTW, that's my wife's damage, not mine. The Dunlop D208 and Qualifiers are the tires we get the absolute worst mileage from......they also tend to slide and give some pretty weird feedback (the Diablos do not). I'll be glad when we burn through the last one (we bought four sets in May when Cycle Gear had them on sale at $159.95 per SET).....the Dunlops don't go well with my 748 nor her R1, either.

Quote from: ducpainter on October 22, 2008, 04:41:09 PM
JM...

you need more rebound damping

Thanks dp!
Ok, so , the only adjustment I have for my stocker is preload.  So basically I just need to live with funny tire wear or purchase a new shock with adjustments?

JM

Quote from: the_Journeyman on October 23, 2008, 05:36:28 AM
Thanks dp!
Ok, so , the only adjustment I have for my stocker is preload.  So basically I just need to live with funny tire wear or purchase a new shock with adjustments?

JM

no damping adjustment at all? My stocker had rebound...

Quote from: the_Journeyman on October 23, 2008, 05:36:28 AM
Thanks dp!
Ok, so , the only adjustment I have for my stocker is preload.  So basically I just need to live with funny tire wear or purchase a new shock with adjustments?

JM

Assuming you have the OEM Sachs shock, there is a rebound adjustment.  It is a brass screw on the right side under the lower spring perch with markings S<--------->H.  Do keep in mind that the shock may need service or replacement if it is OEM has over about 30K miles on it.  If the chrome on the shaft it most likely can be serviced, if the chrome is worn it needs replacement.