Alloy Folding Bike Auxiliary Roller Assistor Wheel Seat Post Silver

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Hidded embedded: The auxiliary wheel is installed inside the folding bicycle seat pole, which is convenient and fast, it will not affect the removal of the bike.
360° universal smooth rotation, free control of direction, small and lightweight.
Not only suitable for folding bikes, but also can be installed on the round tube with inner diameter of 28-32mm, like table, garment racks or shelf.
Embedded Push wheel, Suitable for all kinds of seat tube(without air pump)Specification:Material: AlloySize: Dia 3.5CM/1.38 inch, Height 6.9CM/2.72 inchPackage Includes:1 Piece Auxiliary WheelBooster Wheel;Bicycle Auxiliary Wheel;Universal Booster Wheel for Folding Bike Roller;Assistor Booster Auxiliary Wheel Fold-up Cycling;Universal Bike Training Wheels Accessories;Replacement Wheel Casters Heavy Duty Folded Bike
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