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Old 07-22-10, 11:48 AM   #1
ebrinkman
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Tiagra cassette sprockets material

Hi, does anyone know what the Tiagra cassette sprockets are made of? Steel or aluminium?
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Old 07-22-10, 12:22 PM   #2
Bob Pringle
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All of the sprockets in the Tiagra 14-25 (9 speed) junior racing cassette are steel.
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Old 07-22-10, 12:31 PM   #3
ebrinkman
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Ok, thanks Bob for clearing it up =)
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Old 07-22-10, 02:01 PM   #4
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All Shimano Tiagra, 105 and Ultegra as well as LX, XT (and anything lower) cassettes are all steel cogs. Dura Ace and XTR do use Ti for their largest cogs but all of the smaller ones are steel.

Campagnolo makes an all-Ti ($$$$) and partial Ti versions of their Record cassettes. All of their other cassettes are all-steel.

The only Aluminum cogs I'm aware of were briefly made in the mid-1980's by Sun Tour in their "Microlite" series of freewheels and Campy also made an all-aluminum freewheel for a brief time. These had extremely poor durability and the weight savings wasn't worth the very low service life.
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