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All City 612 track chainring is made of 7000 series aluminum. The 612 is durable, lightweight, and rigid which makes it great for commuting and racing at the velodrome.
Chain Compatibility 1/2" x 1/8"
Regarded as one of the toughest crankset amongst world track racers and messengers globally, the Sram Omnium features the strongest and stiffest 7050 T6 alloy.
• 144 bcd
• Forged AL-7050 arms w/ 48t AL-7075-T6 chainring (1/8")
• 68mm English-threaded GXP bottom bracket included
• Length: 165mm
• Weight: 825g including BB
• BB installs using Park Tool BBT 19.2
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Izumi Super toughness is the best track chain on the market! NJS stamped and certified, this chain was built to handle the strongest keirin racers in the world.
1/2" x 1/8"Full bushings support precision rollers for a quiet and smooth rideStretch-resistant cro-mo steel106 links
Dura Ace cogs are NJS certified and made from hardened steel for durability and a long life.
Standard 1.370"x24 tpi
Dura Ace lock rings are made of hardened steel in Japan. They are NJS stamped and built to last.
Fits most standard track hubs (1.29" x 24 TPI LH)
Doesn't fit Campagnolo style (1.32" x 24TPI LH) or French (33 x 1mm LH) hubs
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