7075 T6 aluminum construction: Delivers superior strength-to-weight ratio for demanding track use
1.37 x 24 TPI threading: Ensures broad compatibility with most track hubs
Multiple tooth counts (15T–19T): Offers gear versatility for various riding styles
Available in purple and black: Allows for personalized bike aesthetics
Lightweight design: Reduces overall bike weight for improved performance
Summarized by Shop
Alter's Midnight Series cogs are machined from 7075 T6 aluminum and are available in sizes 15t-19t.
ⓘ All track cogs have 1.37"x24tpi threading. Any threaded cog can be used on any threaded track hub.
specifications
• standard 1.37"x24tpi threading
• 1/2 x 1/8" only
• 15-19t
• colors: purple, black
• weight: 21g-38g
Material
7075 T6 aluminum alloy
Thread
1.37 x 24 TPI
Chain Width
1/8 inch
Tooth Count
15T, 16T, 17T, 18T, 19T
Weight
15T 21g, 16T 25g, 17T 29.2g, 18T 34g, 19T 38.2g
Color
Purple
Summarized by Shop
5.0
3 ratings
5
4
3
2
1
Runs true, great color and machining quality. Time will tell how the purp wears off.