A black Echo Chromo Cassette Rear Sprocket, CNC machined chromoly with white text.

The Echo Chromo Cassette Rear Sprocket is a black, CNC-machined cog with 18 teeth and circular cutouts, marked “ARISE TECHNOLOGIES” plus specs—part of the Arise Echo Cogs lineup.

Description

Fits: Shimano HyperGlide cassette hubs
Teeth: 14t to 18t
Chain size: 1/2" x 3/32"
Material: SCM415 crmo
Colour: Phosphate Black
Note: 5mm wide built-in spacer. CNC cut-outs on 16t and above.

The Echo cog is CNC machined from SCM415 chromo, which offers better resistance to chain wear than softer cogs. It is designed to fit Shimano HyperGlide cassette hubs and runs 1/2 inch x 3/32 inch chains.

A 5mm wide spacer is built into the cog, giving a more solid interface with the cassette body and one less loose part to keep track of. Sizes run from 14t to 18t, and 16t and above get CNC cut-outs to save extra weight. The finish is phosphate black.

Features

CNC machined SCM415 chromo. Chromo resists chain wear better than softer materials, so the teeth hold their shape through more chains.
Built-in 5mm spacer. The spacer is machined into the cog itself, giving a more solid interface with the cassette body.
Shimano HyperGlide fitment. Made for Shimano HyperGlide cassette hubs, so it goes straight onto a standard freehub body.
Sizes from 14t to 18t. Pick the tooth count that suits your gearing, all cut for 1/2 inch x 3/32 inch chain.
Cut-outs from 16t up. CNC cut-outs on the 16t and larger cogs shed weight without touching the tooth profile.