Step 6:
Fix Saddle (58) onto
Saddle Horizontal tube
（
57
）
of upright post with crosses wrench. Tight the
Saddle Horizontal tube
（
57
）
onto saddle tube
（
52
）
with Knob (53) and flat washer(54) . Then
insert into post tube of main frame (1) .Adjust the holds and fix with Pon-pin (59).
Note: Please kindly insure that saddle (58) is already fix tightly onto saddle horizontal tube (57)
