Sparks [not flames] from a Tron bike

General Discussion
1

I recently noticed a Tron with sparks coming from the rear wheel. Is this an upgraded Tron? I cannot find details of any visible difference in an upgraded Tron. if you put in all that effort then you’d hope it would be visibly different.

2
3

its the factory tour socks from the new challenge

4

Mike
THANK YOU

5

Thank you Peter