Dudley
New member
OK, here is something I have been thinking for some time about rear tire wear on our Spyders. I will use easy rounded numbers for mathamatical symplicity. Let's say that the total weight of the Spyder with rider is 900 pounds. So, because the engine if front of center, let's assume that the front axles weight is 600 pounds, leaving 300 pounds for the rear. So, the total weight resistance to ground is 600 front, 300 rear. When you throttle the Spyder, a rear tire with 300 pounds resistance to ground is trying to move a front end with 600 pounds resistance. The one rear tire has to do all the work to move the Spyder. I wish I had a high speed camera to mount off the rear fender to see what happens when a hard throttle is applied. I believe the center of the tire will bulge outward somewhat because the rear is so much lighter. This would cause the mysterious "wear in the center" question we have. Not all tires are wearing the same, as in no two riders ride the same.
Now, if anyone has a scale that can weigh their Spyder with them on it; total weight, rear axle weight and front axle weight, then we can have actual weight differences per axle instead of theoretical. Maybe together we can come up to a better understanding of what is happening.
Now, if anyone has a scale that can weigh their Spyder with them on it; total weight, rear axle weight and front axle weight, then we can have actual weight differences per axle instead of theoretical. Maybe together we can come up to a better understanding of what is happening.