With larger thicker teeth than the standard Crossfire freewheels and crumbly sprockets with four pawls (two pairs engaging alternatively), the ACS Fat is perfect for street and park riders who like to grind and are tough on their kit

• 14T 1/8" fits smaller, metric BMX flip-flop threads (1.181" x 25.4 TPI / 30 x 1 mm)
• 16T 3/16" fits standard ISO 1.375 x 24 TPI thread pitch and pairs perfectly with the KMC K415H (251036)
• Accommodates wider chains for street riding
• Fits standard threads