ALTA SFW 20T x 1/8 Freewheel Brown | 1.37x24 TPI Threaded Single Speed Cog.

ALTA Freewheel 20T x 1/8 SFW Brown | 1.37x24 TPI Threaded Single Speed Standard | Fits Flip-Flop Hubs BMX Cruiser. Model: SFW. •Removal: uses astandard notched/splined freewheel remover (e.g., BMX/SS 4-notch style such as Park FR-6, or equivalent—match your tool to the SFW interface).

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