Warp 9 RacingDrivetrainSKU A-SSPRO-40-2A
Warp 9 Sigma Limited Edition sprocket mid 25-Current
Size
Ships to the lower 48. Bikes ship free, parts ship free over $99.
Warp 9 Racing manufacturer warrantyclaims handled by MotorHabit
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About this part
A rear sprocket cut for the Altis Sigma built from mid-2025 onward, including the Limited Edition. Eight tooth counts are offered: 40, 42, 44, 48, 50, 52, 54 and 58.
Warp 9 lists this as not fitting the 2024 through mid-2025 bikes, which use a different chain pitch, so the build date matters more here than the model name. Check the chain pitch on the bike before ordering, since a sprocket in the wrong pitch will not run. Gearing down adds climbing torque and takes top speed away; gearing up does the reverse. Extra chain links are not included with the sprocket.
Full specifications
Chain size
428
Size
40 tooth, 42 tooth, 44 tooth, 48 tooth, 50 tooth, 52 tooth, 54 tooth, 58 tooth
Ships from
Warp 9 Racing, Salt Lake City, Utah
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