Bike Components: 420 vs 304 Chains & Frames

 

Why are bike chains often 420 stainless?
Hardened to 50 HRC for wear resistance. Handles grit and friction better than softer steels. Oil regularly to prevent "rust snakes."

 

Is 304 suitable for frames?
Yes! Lightweight and rust-proof. Avoid salty winter roads – rinse after rides. Cheaper than titanium with similar longevity.

 

How to spot fake "stainless" bolts?
Use a magnet: Real 304/316 is non-magnetic. Fake steel sticks. Check for red rust after rain. Buy from reputable brands.

 

Salt damage prevention?
Wipe with WD-40 after coastal rides. For chains, use wax-based lubricant. Never store wet.

 

Upgrading to titanium worth it?
Only for weight-obsessed racers. Stainless offers 90% performance at 1/3 the cost for casual riders.