YOOO! So i have built my own wheel, and the wheel has one place where it dips (verically) like 1mm. It's not vertically true... But the wheel is true side to side... If that makes sence. When I pump up the tyre to about 2bars the tyre hops of the wheel, and has one time led to explosion. I have tried buying a new Maxxis creepy crawler, to see if a new tyre would help, but no.
BUT i have a smaller 20" tube, which might cause any problems? It's a common 20" tube, which isn't for trial... Hope someone could help..
Thanks
William