• 1. Constructed of quality and high-strength materials. Durable and not easy to rust.
• 2. Hollow axis, suitable for mountain bikes, road bikes, folding bikes, BMX.
• 3. Reduce chain wear and strong bite force. Easy to install and use.
• 4. Replaceable disc, 0 deg; offset. Upgrade your bike and bring a better experience.
• 5. Suitable for modified, DIY, upgrade the bike.

choice 1: 1 set of Crankset with Central Axis
choice 2: 1 set of Crankset without Central Axis