The Oneup 16T Cog replaces the 15T and 17T sprockets in a 10spd cassette to smooth out the shifting progression in a wide-range conversion. The shifting becomes seamless in your wide range cassette, particularly when taking upon huge ascents.
Oneup 16T Cog Specifications
claimed weight:18g (16T)
CALIFORNIA PROPOSITION 65 WARNING: This product can expose you to chemicals including (Cadmium, Phthalates, Bisphenol, Nickel (Metallic), di(2-ethylhexyl)phthalate "DEHP"), which is known to the State of California to cause cancer and/or cause birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
Not worth buying separately, try buying an original Shimano cog instead. Installed Oneups 16t cog correctly on a shimano cassette but shifting thru this cog is terrible. Every other cog shifts perfect but this one. It appears that Oneups cog doesn't duplicate the exact Shimano cog which makes for unreliable shifting performance.
This was added when I converted to 1 x 10 from 2 x 10 and added a 42t cog. You have to remove either the 15t or 17t cog to make room for the 42t. Initially, I removed the 17t but found the up shift from 15t to 19t to be not so smooth. I removed the 15t and added the 16t and that has helped to smooth out the jump from 13t to 16t to 19t. Not perfect, but better than before.
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