SDG I-Beam Seat Post - 31.6mm - 400mm Length Envelope Shipping They also feature a water

They also feature a water resistant treatment to help keep them dry during those wet adventures

No more foul tasting water and discolouration

Convertibility: These are QRx135

2mm suits Chris King and Wheels Mfg

2V 7000mAh

SDG I-Beam Seat Post - 31.6mm - 400mm Length Envelope Shipping They also feature a waterAn engineering masterpiece. Proven, single bolt post which offers unrivalled ease of installation and fore aft micro adjustment to I Beam saddles. Bombproof design, with a 2014 aluminum hard anodized machined tube, paired with a cold forged 2014 head and clamp. While only compatible to SDG's patented I Beam Technology saddles the original mono rail is the premier seat to post connection system, which utilizes the latest composite materials to create