Originally Posted by carldmd
So I've noticed this slight squirrely motion of the front end lately. I've got 3000 miles on my GT. Had to replace the rear Bridgestone 020 tire at 700 miles due to a flat, and placed a Metzeler M1 on the rear while running the BT 020 on the front.
Now I carry my backpack, which weighs about 20lbs. in the topcase. I carry my Powerbook in the backpack. Could this weight account for the motion of the front end.
Also, here's a photo of the cupping of the front tire:
Anybody have any comments? I'm scheduled to have both tires replaced this afternoon to see if that helps.
I had 020s on my departed '02 RT. I did not own that machine when the 020s were installed. The front cupped/feathered badly at or before half life. Not noticing any bad ride or handling issues because of the tire I rode 'em till I sold the bike.
Interestingly, I replaced the '02RT with a new '04GT. It came equipped with 020s as well.
I'm about to replace the tires on the GT for the first time. I have 9,700 miles on those original 020s. The tire pressures were always kept at or a bit above factory specification. 36 front / 42 rear. Only when returning home to Cleveland from Washington D.C. this month did the front tire finally give up and show some significant cupping/feathering.
In fact it looks alot like yours, except worn to the wear indicators.
It is now wasted, done, finished.
The 020s really performed quite well for me on the GT. Predictable , good in the rain, enough grip for my risk level, and quiet running.
For kicks and comparrison sake I now have a set of Avons for it (not yet installed).