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or motor controller to monitor rotational speed
8 M4 fixing holes
All protection make it long life and safe: over/under voltage
Designed with an ergonomic
Real speed: NO
CYC E-Bike Mid-Drive Freewheel 2.0 Upgrade for X1 Pro Gen 4/3 & X1 Stealth Gen 3 or motor controller to monitorPLEASE NOTE THIS FREEWHEEL IS ONLY COMPATIBLE WITH 219H SPROCKET 2. 0 VERSION. The Freewheel 2. 0 is designed to upgrade your CYC e bike crankset, providing smooth and reliable drivetrain performance. When paired with the 219H Chain Sprocket 2. 0, it ensures complete drivetrain enhancement for X1 Pro and X1 Stealth kits. Compatibility X1 Pro Gen 4 X1 Pro Gen 3 X1 Stealth Gen 3 X1 Pro and X1 Stealth Gen 1 & Gen 2 (with Freewheel 2. 0 upgrade)
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