## 520 Chain vs 525: Which Motorcycle Chain Is Right for You?
Choosing between a **520 chain vs 525** is one of the most common dilemmas riders face when replacing a worn-out drive chain. Both sizes share the same 5/8-inch pitch, but their width and weight differ—and that difference affects performance, durability, and cost.
### **What Do the Numbers Actually Mean?**
The first digit indicates pitch (distance between pins) in eighths of an inch. The last two digits represent the chain’s width in eighths of an inch. A **520 chain** is 5/8″ pitch and 2.5/8″ wide, while a **525 chain** is 5/8″ pitch and 2.5/8″… wait—more precisely, 525 is 5/8″ pitch and 2.5/8″ roller width? Let’s clarify: 525 chains are 5/8″ pitch and 2.5/8″ inner width, but the outer width is slightly thicker, and the rollers are wider than a 520. In practice, **525 chains are wider and heavier** than 520 chains.
### **Weight vs. Strength**
– **520 chain**: Lighter, less tensile strength, preferred in racing and smaller-displacement bikes (up to ~600cc).
– **525 chain**: Heavier, stronger, better for larger sportbikes, touring, and adventure bikes (600cc–1000cc+).
A lighter 520 reduces unsprung mass and rotational inertia, improving acceleration and suspension response. A 525 offers greater wear resistance and longevity under high torque.
### **Compatibility and Sprockets**
You cannot swap a 520 chain onto 525 sprockets or vice versa. The **sprocket thickness** differs: 520 sprockets are thinner. If you switch from 525 to 520, you must replace both front and rear sprockets. Many riders convert to 520 for track use but accept shorter chain life.
For a full breakdown of chain dimensions and sizing charts, see this guide on 520 chain vs 525.
### **Frequently Asked Questions**
**Can I use a 520 chain on a bike that came with a 525?**
Yes, if you also change both sprockets to 520. However, you may lose some durability.
**Is a 525 chain stronger than a 520?**
Generally yes—525 has thicker plates and wider rollers, offering higher tensile strength.
**Which is better for touring?**
525, due to longer wear life and less frequent adjustment.
**Does chain size affect horsepower?**
A 520 chain reduces parasitic drag slightly, freeing 1–2 hp at the wheel in some cases.
### **Final Verdict**
If you ride a 600cc sportbike on track, a **520 chain** saves weight. For street, touring, or big-bore bikes, a **525 chain** delivers reliability. Always match chain and sprockets—and replace them as a set.
**Ready to upgrade?** Check your bike’s stock size, then choose the right chain and sprocket kit today.