How to judge a bicycle

- Mar 06, 2020-

1.    1. First of all, the frame. The overall frame strength is the most important standard for a bicycle, and it is also the safety guarantee for riding. A good frame needs to be welded by reasonable mechanical application design and corresponding materials. Here, the welding method of the frame is mainly mentioned

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At present, the welding methods of frame are fish scale welding and flat welding

The standard of fish scale welding is:

Weld bead width 7-8mm, 9-11 pieces per inch, clear, full, no pinholes, sand holes, false welding, etc. the ending point should be placed at 5 or 7 o'clock


Weld bead standard for flat welding:

The standard width of flat welding bead is 11-13mm, and the surface shall be uniform without pinholes, pores, undercuts, false welding and other phenomena.