Tire Wear Mystery

[Jeriatric]

(Note:These are not car tires.)​

They’re special flat-tread motorcycle tireswith directional mounting, inflated 13 to 17psi. Can-Am reps at the demo expected these​

tires to last in excess of 50,000 miles.


http://archives.wingworldmag.com/august2007/WingWorld-Aug2007-Web.pdf

 

[BajaRon]

It's more than just the factory adjustment. I'll admit that all Spyders are not the same, so the factory settings are less than precise, but there's another wrinkle. The Spyder suspension geometry is such that the alignment changes as the suspension is loaded or raised. This is especially true on the RT. A heavier rider/passenger load is likely to make the Spyder toe out too much. Raising the suspension, as happens with Elkas, toes it in...sometimes too far. There are some Spyder/rider combinations that are just right, while others are not, resulting in uneven tire wear.

I think the technical term for these conditions is 'The Goldilocks Syndrome'.

 

[Bob Denman]

:shocked::hun: I never heard that one... :dontknow:

 

[groswald]

Possibility?

I read an article some time ago about why the left edge of motorcycle tires wears out before the right. Turns out the distance traveled in a typical left-hand turn (assuming you drive on the right) is 3 to 4 time the distance traveled on a right-hand turn. (Remember circumference = pi* diameter). Over the life of the tire it's enough to show significantly more wear on the left side than the right assuming roughly equal numbers of right and left turns.

Given that your problem is with the wear surfaces for a non-leaning left hand turn, perhaps this is your issue? Or some really bad camber issues!

Just a thought.

Randy

 

[docdoru]

IMHO is all about the quality of the front cheap tires, possible casting defects:
1. I run OEM front tires 60K+60K+30K without any uneven wear on a 2008 Spyder where you can count on one hand the original parts.
2. Who replaced the OEM with upgrade tires doesn't see the same wear patern.
3. BRP changed the tires size and design in the 2013 models.