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There are times when you would need to cut down the Brompton seatpost. Here is how you do it:
![](http://www.petrelli.cc/wp-content/uploads/2018/06/cutting_a_long_seat_post_001-1024x681.jpg)
Step 1 – measure the necessary length that you needed and use a quality tube cutter to cut out the extra bit.
![](http://www.petrelli.cc/wp-content/uploads/2018/06/cutting_a_long_seat_post_002-1024x681.jpg)
Step 2 – In no time, the tube will break into two.
![](http://www.petrelli.cc/wp-content/uploads/2018/06/cutting_a_long_seat_post_003-1024x681.jpg)
Step 3 – Sanding the sharp edges down to around and smooth.
![](http://www.petrelli.cc/wp-content/uploads/2018/06/cutting_a_long_seat_post_004-1024x681.jpg)
Step 4 – Done!