Cassette Material

[ALLMTB]

I need some clarification regarding the material used to make the cassette sprockets. On my Shimano SLX cassette, sprocket 28 to 36 have a different colour to the rest. They are really shiny (chromed almost) and the rest have a darker bronze-ish colour.

What is the reason for this? Are the sprockets made of different materials?

 

I can’t really find any info on the net. There are mentions of titanium here and there but I don’t know if a middle of the range cassette would contain titanium.

 

Your thoughts?

[TNT1]

What's that phrase I'm looking for?

 

Let me google that for you!

 

Specifications Model Number CS-HG80 Series SAINT - SLX - DEORE LX Alloy Sprocket Carrier yes Number of Sprockets 9-speed HG Sprocket Material steel Sprocket Finish Chrome/Nickel Chain Compatibility Super Narrow HG Average Weight 245g (11-28T, 282g (11-32T), 315g (11-34T) Cassette Options 3

http://www.shimano.c...80.-type-..html

Edited March 20, 2012 by TNT1

[TNT1]

If you click on the link, you'll see the option cassette comes with some ti sprockets.

[ALLMTB]

Thanx, but is the difference in the colouring due to the different plating and/or titanium sprockets?

If so, why would some sprockets on the same cassette be plated with a different material or made out of a different material?

Is it due to the different torque loads on different sprockets?

[TNT1]

Yes, and I don't know. Probably.

[Minion]

Thanx, but is the difference in the colouring due to the different plating and/or titanium sprockets?

Yes. The shiny ones are chrome plated, the dull ones are nickel plated.