Key features

• •💯 What You Get: In this kit, you will get 50pcs 10 kinds 4mm to 8mm (1/6" to 1/3") bike ball bearing, each kind 5pcs. All are packaged well in a transparent plastic box for easy storage and carrying. A practical tool kit can meet most of your needs.
• •💯 Premium Material: The ball bearing headset retainers are made of high-quality alloy materials, which are sturdy and durable and not prone to breakage. It also has excellent corrosion resistance and wear resistance, is not prone to rust or damage, and ensures long-term stable operation. The surface is smooth and the particles are uniform.
• •💯 10 Kinds Option: Our kit provide 10 Kinds for you, ID x OD x Ball Dia: 33 x 40 x 3.9mm / 1.3" x 1.6" x 0.15", 30 x 37 x 3.9mm / 1.2" x 1.4" x 0.15", 25 x 39 x 7.9mm / 1" x 1.5" x 0.31", 31 x 45 x 7.9mm / 1.2" x 1.8" x 0.31", 27 x 36 x 3.9mm / 1" x 1.4" x 0.15", 25 x 34 x 6mm / 1" x 1.3" x 0.24", 22 x 30 x 5mm / 0.9" x 1.2" x 0.2", 19 x 29 x 6.3mm / 0.73" x 1.1" x 0.25", 14 x 24 x 6mm / 0.55" x 0.95" x 0.24", 13 x 20.5 x 5mm / 0.5" x 0.8" x 0.2".
• •💯 Powerful Function: Ball bearings are mainly used to reduce friction, support weight and ensure smooth steering. If ball bearing accessories rust, wear or are improperly installed, it can cause the front of the vehicle to loosen, shake and make abnormal noises, which is not conducive to your cycling safety. Some lubricants can be added during the installation process to extend its service life.
• •💯 Wide Applications: Bike ball bearing kit are widely used in the replacement of bicycle parts, such as mountain bicycles, road bicycles, scooters, foldable bicycles, children's bicycles, children's motorcycles, low-rider bicycles, and elastic bicycles. Choose our bicycle crank bearings to provide reliable safety for your riding.