Hi guys, I just picked up an old sears mini bike that from what I can tell is the same as a Bird Wren. I bought some 4"wheels and the rear hub is way too wide which is throwing off my alignment. I found pictures online of this bike and the sprocket hugs the tire. With this set-up the sprocket stands way off from the tire. I can't seem to find anything but the same rear hub that I have. Is there a narrow hub available somewhere or do I need to come up with something different? I saw someone using a Azusa wheelset with a drum sprocket but I want to use steel wheels if I can. Also what size motor is this bike supposed to have? Thank you in advance.
