Fantastic4
Adjustable Air Pressure Carbon Suspension Block for Brompton Bicycle
$89.50 USD
Size
$89.50 USD
Air pressure is adjustable for different weight of rider or terrain
Materials: Titanium Alloy
Maximum inflatable air pressure value 150psi
Video 1:
https://www.youtube.com/watch?v=rXCBukCm2BY&feature=youtu.be
Video 2:
https://www.youtube.com/watch?v=8_KyvXHBj78&feature=youtu.be