julio 28, 2026Publicado Por En julio 28, 2026e*thirteen Helix R 107 BCD 4-Bolt Chainring – 42t 11/12-Speed 107BCD BlackThe 38 40 and 42 tooth rings pair perfectly with e thirteen’s cassettes for more overall range and higher top speeds. Made from durable premium 7075 alloy they're CNC sculpted for a high stiffness-to-weight ratio.
