Niner SIR9 frameset - $400 (Boulder)

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Used medium size 29er frame with Salsa Cro-Moto Grande rigid fork. Frame and fork are in great shape...no issues. Both were powdercoated a sage green by Premium Powdercoating in Longmont. Reynolds 853 tubeset has that lively, snappy feel--steel is real!

Includes Niner ZS44/EC44 headset installed, Niner YAWYD top cap, Niner seatpost collar, Niner Biocentric II eccentric bottom bracket shell with Shimano BB installed, and Maxle front and rear thru axles. Also includes single speed-specific dropout (installed) and a dropout with a derailleur hanger if you want to run with gears. Downtube has removable cable guides for a rear derailleur. Geometry is in last image. Spacing is 15x100 front, 12x142 rear. Takes a 27.2mm seatpost. Tire clearance...it will easily fit a 2.4" in the rear and 2.6" up front (maybe larger but haven't tried).

I also have a DT Swiss wheelset listed that I used with this frame...buy both for $600!

post id: 7907938443

posted: 2026-01-11 08:43

updated: 2026-01-11 08:52

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Niner SIR9 frameset - bicycle parts - by owner - bike sale -...

Used medium size 29er frame with Salsa Cro-Moto Grande rigid fork. Frame and fork are in great shape...no issues. Both were powdercoated a sage green by Premium Powdercoating in Longmont. Reynolds...