Feature(may vary by option.)

●Dimensions: the 20-tooth single speed flywheel can provide a higher running speed. Chain compatibility: 1/2 inch x 1/8 inch.
●Durable: Made of high-quality iron, high performance and heat resistance, long service life.
●Stability: high-precision internal thread to ensure a firm connection to the bicycle hub and a stable rotation.
●Use: This type of flywheel is one of the strongest and most durable flywheels of multi-speed bikes. Suitable for mountain bikes and folding bikes, hybrid bikes, city bikes, fat bikes, beach crusier bikes and so on.
●International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.

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Description