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Re: [ST] Raise your cup



Cupping, which is more accurately described as scalloping is a natural wear pattern on motorcycle tires and it will always follow the tread pattern. The leading edge of the tread does not flex much as it grips the road and the rubber is scuffed off the tire in that area causing a depression. As the tire rotates, the pressure moves to the trailing edge of the tread pattern where the tread flexes more causing less scuffing so less material is ground off the tire. 
   
  HTH, 
T

Mark Needham <gbdiver@xxxxxxxxx> wrote:
  Forgive my ignorance, what is 'cupping'?

----- Original Message ----- 
From: "Todd J" 
To: 
Sent: Wednesday, June 20, 2007 12:14 PM
Subject: Re: [ST] Raise your cup


> Response from Metz:
> Dear Todd
> All brands of front tires will cup because of the braking forces
> applied to the tire during normal riding. To lessen the issue higher air
> pressures will help slow down the problem. Mnay BMW rdiding using Z6 tires 
> know that higher pressures will make the tires last longer so it is
> common for these riders to run 40 to 42 in the front and 42 in the rear to
> maximize the mileage.
> Thank you for your interest in our company and products.
> Best Regards.
>
> Customer Service
> Metzeler MOTO
>
>
> Jeremy Witt wrote:
> Try running 38 for about a 1000 miles. As I've said before, recommended
> + 4-5 psi has reversed the cupping for me on more than one front tire.
>
> YMMV!
>
> Jeremy Witt
> Newbury Partners
> www.newburypartners.com
> (o) 603-893-3022
> (c) 603-475-4228
>
> -----Original Message-----
> From: st-bounces@xxxxxxxxxxxxxxxxxxxx
> [mailto:st-bounces@xxxxxxxxxxxxxxxxxxxx] On Behalf Of Todd J
> Sent: Wednesday, June 20, 2007 1:06 PM
> To: ST@xxxxxxxxxxxxxx
> Subject: Re: [ST] Raise your cup
>
> Looking again at the Metz page, they recommend 34 for the front. Any
> other ideas to the a possible cupping issue? Balance was good as I
> watched them get setup.
>
> I dont feel any shake during braking, or riding. Buttery smooth. No
> noticable triple clamp/head bearing looseness either. I traded bikes for
> a bit over the weekend with a bud on a 96 S3 and got back on mine and
> was "glad to be home" on my silky smooth scoot...
>
> The cupping is really minor so, maybe I am over-reacting?
>
> I have been more than happy with their performance.
>
> Jack Hays wrote:
>
> Todd, I have never cupped a Z6 and run about 36-38psi in the front and
> 38-39psi in the rear always.
>
>
>
> Jack "Rude Dog" Hays
> 972-952-5065
> "I'll see you on the dark side of the Moon"
>
> If you spend a perfect afternoon in a perfectly useless manner, then
> your
> dog has taught you how to live.
>
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