SPECS:
FIT: Crupi Rhythm hubs or any Shimano compatible hubCHAIN FIT: 3/32″ recommended (1/8″ can be used as well)
MATERIAL: CNCmachined 6061 aluminumJ&RHelpful Hint: Cogs and sprocketswear over time. We recommend replacement at least every 6 months due to chain wear.

Weight:
12T: 0.21oz/6g13T: 0.31oz/9g14T: 0.38oz/11g15T: 0.45oz/13g16T: 0.53oz/15g17T: 0.6oz/17g18T: 0.67oz/19g