A support frame in a mountain bike Sj-303 is supported in the bracket/foot support/groove of road vehicle

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All-aluminum adjustable mountain bike/road car/all-purpose bicycle support

High quality all-aluminum bicycle in support

Color: black

Material: aluminum alloy

42 cm length:  Adjustable length from axle to travel end (27-33cm)

It fits 24 inches and 26 inches 27 inch wheel diameter for bicycles  

Install the rear bottom fork to adjust the height.

Install in the middle of the bicycle after five pipe (please note that there are two types of screws provided one is the inner hexagon One is the outer hexagon.

The upper part is the screw of inner hexagon