BBB Cycling BSP-20 Sky Scraper Seat Post - 31.6MM Black Mounts which means some annoying trial

which means some annoying trial and error trying to get the right valve for your set up

not the discomfort

Wheel Set: Alexrims CXD6 Alloy

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BBB Cycling BSP-20 Sky Scraper Seat Post - 31.6MM Black Mounts which means some annoying trialBBB Cycling BSP 20 Sky Scraper Seat Post 31. 6MM Black The sky is the limit! Extend your seatpost as far as you want, an almost endless extention. A seatpost with a super easy to use saddle attachement system. Another great feature of the SkyScraper is the many different sizes it is available. 30 sizes to make sure we got a seatpost for every bike. The possibilities are sky high! Like a skyscraper! Compatible with all bikes Cold forged 6061 T6