MSR Racing 520 41Hundred Series Rear Sprocket
The MSR 41Hundred Series Sprocket is the hardest, longest lasting sprocket in the world today. Made of 4100 series chromoly which is a blend of
chromium and molybdenum along with manganese and nickel. It is extremely tough and wear resistant. Added to that they are heat treated to add extra hardness to the metal, through and through, not just on the surface, using the quench & tempered method. This is the same process used on the highest quality tools.
A quality rear sprocket needs the best materials but it also needs the best manufacturing processes. The 41Hundred is cut by a Mazak Fiber Laser to a much finer degree of precision than most other cutting methods. The teeth themselves are shaped into a special double “U” shape that allows the chain to roll easier on and off for maximum horsepower transmission. Lastly the sprocket is nickel/chrome plated to help prevent corrosion and then laser etched.
In the past you had to choose between a sprocket that was long lasting or lightweight. The 41Hundred is made from such a tough material that we can cut away far more excess material than other steel sprockets making it the lightest chromoly sprocket in the world. How light? A modern motocross bike’s rear wheel weighs just 2% more with our 41Hundred sprocket on it compared to having the lightest aluminum sprocket attached. And that aluminum sprocket wears out 3 to 4 times faster than our 41Hundred chromoly sprocket.
- One year guarantee against excessive wear
- Lightest chromoly sprocket
- Lasts 3 to 4 times longer than aluminum
- Made in USA
- Precision laser cut
- 250,000 PSI tensile strength vs 90,000 in 7075 alum.
- Average 50 tooth sprocket weighs just 1.3 pounds (590 grams)