520 Chain vs 525 Chain: Which Motorcycle Chain Is Right for Your Bike?

Choosing the right motorcycle chain affects performance, longevity, and safety. If you’re stuck between a 520 and a 525 chain, you’re not alone. This guide breaks down the 520 chain vs 525 chain debate so you can ride with confidence.

Understanding Motorcycle Chain Sizing

Chain sizes like 520 and 525 follow a simple numbering system. The first digit indicates pitch (distance between pins), and the last two digits represent the chain’s width and roller diameter. Both 520 and 525 chains share a 5/8-inch pitch, but the 525 is wider and slightly heavier.

What Do the Numbers Actually Mean?

The “5” means a 5/8-inch pitch. The “20” or “25” refers to the inner width in eighths of an inch. A 520 chain is 2.0/8 inch wide, while a 525 chain measures 2.5/8 inch. That extra width affects strength and weight.

520 Chain vs 525 Chain: Key Differences

Here’s how the two stack up:

• Weight: 520 chains are lighter, reducing rotational mass.
• Strength: 525 chains offer greater tensile strength due to wider plates.
• Wear Life: 525 chains typically last longer under load.
• Cost: 520 chains are usually cheaper and lighter on the wallet.

When Should You Choose a 520 Chain?

Sportbikes and smaller-displacement motorcycles often use 520 chains. If you prioritize acceleration, reduced weight, and track performance, a 520 chain is a smart pick. Many racers swap to 520 for quicker throttle response.

When Should You Choose a 525 Chain?

Larger bikes, touring motorcycles, and adventure bikes typically run 525 chains. If you carry luggage, ride long distances, or need maximum durability, the 525’s extra strength pays off. It handles torque and high mileage better.

Compatibility and Sprocket Matching

You can’t simply swap a 520 chain onto a 525 sprocket. The width difference means mismatched components wear rapidly and can be dangerous. Always match chain size to sprocket size, and check your bike’s factory specification before upgrading or downgrading.

Some riders convert from 525 to 520 for weight savings, but this requires changing both sprockets and the chain. It’s a complete system swap, not a plug-and-play upgrade.

Frequently Asked Questions

Can I Replace a 525 Chain With a 520 Chain?

Yes, but only if you also change the sprockets. The narrower 520 chain won’t fit 525 sprockets properly, leading to premature wear.

Is a 520 Chain Stronger Than a 525?

No. A 525 chain is stronger because it’s wider and has more metal. However, a high-quality 520 chain can still handle many sport