Hotshot 系用頭單向

1. outer wheel can run freely, full power to inter wheel
2. no only if you use both one direction in both front and rear, yes I seen one before..
3. see two difference hong kong brand before

please someone correct me, think like a little bit wrong.

[ 本帖最後由 fat_fat_cat 於 2008-3-4 03:26 編輯 ]

i think should difficult to get law...