Join Date: Jun 2010
Location: NW,Oregon Coast
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this seatpost is Titanium,http://www.brompfication.com/41-titanium-seatpost.html
BikeFun is Aluminum , anodized for Color.. [ not bought from, either ],
considering the 5mm bolt type roller as an upgrade on the
wheels on the back edge of the Carry Freedom City's back edge roller ,
which drags the back tube of the trailer in anything softer than a solid floor..
they let you push the folded trailer in a narrow space, like between back to back seats..
Dont see the alloy substutution for the chain tensioner any where but the TW site ..
Its still, as I did quick currency conversion $110 . or there abouts , still uses the 6 speed Brompton sliding pulleys
has to because the shifter pushes on the flanges on the pulley. itself .. would take more redesign to put a sealed bearing pulley
spinning freely between the 2 flanges..
not as showy as having the polished aluminum piece..
Own an M3L .. there the practical upgrade is to a pair of Tacx sealed bearing pulleys.. 10t.