| Author | Message | ||
     Rwcfrank |
I went on a bit a high speed run, about 80-90 mph for 2 hours or so in about 75 degree heat. After the ride I noticed quite a bit of rubber powder on my back rim, I assume is from the belt. I inspected the belt and it looks good, no tears, cracks or rubbing. It does look like it may have walked towards the center and contacted the shoulder on the rear pulley. Wheel bearing are good, no play and the rear wheel turns smoothly. My bike has around 5K on it with no issues to date. Is there something I should be checking or is this normal. I am not sure why the belt would move if it hasn't moved during the last 4999 miles. BTW I saw a fellow Uly rider e/b on 85 near Mountain View during the ride on a slower black model..Badwebber? | ||
| Ft_bstrd |
Could be from your tire rather than the belt. High speed + warm/hot roads = rubber loss | ||
| Rwcfrank |
Ft_bstrd, I was hoping it was the tire but I cant see how rubber would find it's way onto the spokes and the inside of the rim. I took a real good look at the belt and it's running true and the belt looks to be in fine shape... | ||
| Ft_bstrd |
As the tire wears, it is throwing rubber powder forward under the tail section where it gets blown backward and sucked into the rear wheel. Only the bigger heavier chunks are sticky enough to get stuck to the underside of the tail section. If your belt were shedding that much rubber, you'd know it. There would be strings everywhere and it wouldn't "good". | ||
| Rwcfrank |
Thanks Ft_Bstrd, I did cover some serious asphalt today...I will keep an eye on it and ride it like I stole it. | ||
| Brakes2late |
I do 80 miles a day on the freeway at 75-80mph the whole time and my rim always looks like that. I gave up cleaning it! | ||
| Ft_bstrd |
Do a track day. Holy Crap! There are hot molten chunks of rubber stuck to the rim. Add brake dust and it's nasty. | ||
| Florida_lime |
On the track, the tire wears in little gummy balls that shred off the tire. A lot of the bigger chunks are from car tires, especially if you go off the racing line. Under normal street use, the wear is less drastic than on the track, so there will be much less rubber coming off, and in a finer form. However, that being said, I do feel most of what the OP is seeing is from the belt. I always have more rubber dust on the rear wheel of the Uly than any other chain drive bike I own, have ever owned, or raced. This was especially pronounced after a pre-emptive belt change, (once my idler wheel was easily spun with one finger !) as the new belt seated in. As long as the teeth are in good shape, I wouldn't worry about it. Many people see "cords" on the edges of the belt (me included), and I think much of the rubber dust comes from this area. |
