JT Sprockets JTR210.40 Steel Rear Sprocket – 40 Tooth, 520 Chain, Black

Time for a new rear sprocket?

This is a JT Sprockets JTR210.40.

It's a 40-tooth steel sprocket made for a 520 chain.

JT is a solid brand, and this one's made from ultra-durable high carbon C49 steel, so it's built to last.

It's finished in black and is brand new in the package.

Just a straightforward, quality replacement part for your bike's drivetrain.

No fuss, just good steel and the right number of teeth.