Wilsons Sandbox

Sorry to be an ignorant lad, but what the heck is tire cupping? What does it look like? There was a thread a while back that was discussing a 'standing wave' that was created by the rototation of the tire. I understood all that, but I don't know what to look for on a tire! Tim Ryce eh9 - 22000km. ps- If there's any BMW cage lovers out there: I touched the 2001 E46 M3 last night. A local car dealership had one of the 2 pre-production vehicles on hand for display. And right next to it, the hand-built Z8. Even if they did have 4 wheels, they were mighty pretty! Message: 20 Date: Wed, 26 Jul 2000 19:16:10 -0700 From: "billmonahan" Subject: Re: Out of balence? Is it cupped? I've ben experiencing the same thing from the front tire on my beemer, and it is from cupping, the tire has about 5000 miles on it.

----- Original Message ----- From: Robert T. Heywood To: KLR Sent: Wednesday, July 26, 2000 7:08 PM Subject: [DSN_klr650] Out of balence? When I am cruising along at lower speeds (20-40mph) the front wheel seems to have a pulsation, like it's out of balance or round. Any thoughts?? Thanks!!

--- In DSN_klr650@egroups.com, tryce@r... wrote:

> Sorry to be an ignorant lad, but what the heck is tire cupping?

What does

> it look like?

Tim, it looks like the circumference of the tire has gotten a little "bumpy" with raised portions of tread, their forward edges kind of lifting up. You've never experienced it? Every bike I've ever had has done it to one degree or the other. Usually the other. It's usually worse on the left side of the tire, due to the crown in the center of the road.