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Due to a breakthrough COVID infection,
STBG will be closed until Friday, October 29

Steve has been reaching out to customers about bikes and appointments,
but if you have a bike in the Shop or an upcoming appointment and haven’t heard from him,
please drop a line to info@stevethebikeguy@com.
Thank you for your understanding.


BOX Cosine Chainring

BOX Cosine Chainring
$49.95
Color:
Black
Please select options

Details

- CNC-machined 6061-T6 aluminum with rounded tooth profile to reduce chain wear

Part Numbers

Option UPC MPN
Black / 38t 639266089834 BX-CR144B38T-BK
Black / 40t 639266089858 BX-CR144B40T-BK

Reviews