FIT Key Sprocket (25, 28, 30T)

This CNC-machined sprocket features 1/8" teeth and a universal 15/16" (24mm) center bore with included adapters for 19mm, 22mm, and 24mm spindles. Made in the USA and available in three tooth count options with weights ranging from 2.72 oz to 3.84 oz.

Key Features

• CNC-machined construction – Precision machining ensures accurate tooth profiles and consistent tolerances for smooth chain engagement and extended drivetrain life
• 1/8" tooth width – Standard BMX chain compatibility works with most modern chains without requiring specific matching
• 15/16" (24mm) center bore with included adapters – Universal bore fits 19mm, 22mm, and 24mm crank spindles using provided steel hat washers, eliminating need to purchase separate hardware
• Three tooth count options – Choose from 25T, 28T, or 30T to adjust gear ratio for desired balance between acceleration and top speed
• Lightweight design – Weight ranges from 2.72 oz (25T) to 3.84 oz (30T) for reduced rotational mass compared to heavier sprockets
• Made in USA – Domestic CNC machining with quality control throughout production

Technical Specifications

• Material: CNC-machined aluminum
• Tooth width: 1/8"
• Center bore: 15/16" (24mm)
• Spindle compatibility: 19mm, 22mm, 24mm (with included adapters)
• Available tooth counts: 25T, 28T, 30T
• Weight: 2.72 oz (25T), 3.36 oz (28T), 3.84 oz (30T)
• Included hardware: 19mm and 22mm steel hat washers
• Made in: USA

Compatibility and Ideal Use Cases

Works with all three-piece cranks using 19mm, 22mm, or 24mm spindles and standard 1/8" BMX chains. The 25T option provides quick acceleration and easier manual balance for technical street and park riding. The 28T balances acceleration with reasonable top speed for all-around use. The 30T offers higher top speed for racing, dirt jumping, or riders who prioritize speed over quick response. The universal bore and included adapters make this sprocket compatible across different cranksets without additional purchases.