PROFILE CASSETTE COG rotor These Pro chain rings are

These Pro chain rings are CNC machined in house from German 7075 aircraft grade aluminium and anodised in black

while material has been removed from non-contact areas to save weight

Sizes:-Standard Steel Cogs: 12t

- Special heat treatment

PROFILE CASSETTE COG rotor These Pro chain rings areProduct Description PROFILE CASSETTE COGS The proprietary 10 spine center of these cogs fit only Profile Racings Splined Cassette Drivers. SUIT = Mini, Madera, Elite, Classic 1 speed, Elite 1 speed & High Flange Cassette Hubs Standard and Elite Cogs are CNC machined from heat treated 4340 aircraft alloy steel for strength and durability. Aluminum Cogs machined from 7075 Aluminum. Sizes: Standard Steel Cogs: 12t, 13t, 14t, 15t, 16t, 17t, 18t All 3 32