Bicycle reducing sleeve is made of aluminum alloy material, which has light weight, light appearance, high processing precision, strong compatibility and rust resistant durable, and can be effectively installed to the interior of the frame to achieve conversion.
The size of bike seatpost adapter is 30.4 to 27.2mm and length of 60mm,which is suitable for the diameter of 30.4mm frame, seat tube conversion can only be from small to large, but can not be from large to small.
Sleeve seat post tube adapters are suitable for mountain bikes, hybrid bikes, cruisers, dirt bikes, folding bikes, road bikes, etc. Let you build your own unique bike.
Open the seat tube clamp, put the seat column reducing sleeve into the frame seat tube aperture, push the seat tube into the seat column reducing sleeve to adjust the height, lock the seat tube clamp to complete the installation.
Seat post tube fittings are easily installed and removed without additional tools. They take only a few seconds to install and are easy for you to use. You can change the size of the bike cushion cylinder according to your needs.