520DZ2 is a high-performance chain available at an affordable price.

Two times longer life than the previous 520DZ - Designed to meet demands of the most grueling MX tracks with SDH technology.

SDH Pin - Extreme Impact Pin Strength:

• SDH pin treatment creates an extremely hard Chromium Carbide Layer on the pin's surface. But at the same time, the inner core is maintained soft to absorb shock loads of extreme jumps, etc.

Solid Bush - Cold-Formed High-Precision Bushing:

• Solid Bushing chains have a high wear-resistance. The cold-formed solid bushings have a smooth seamless surface with complete roundness.
• Solid bushing = longer chain life

This chain has 120 links.