e*thirteen Extended Range Cog


Make your move to 1X and crush the steepest climbs with the EX cog.

Shifts stay crisp thanks to e*thirteen shift know-how and the anodized aluminum resists flex under heavy power. Pair with a dual width Guidering M and you are ready to go.

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Product Spec

Black, Red, or Blue
CNC-machined 7075 Aluminum
40T, or 42T
40T: 70g

42T: 77g

Tech Info

Guaranteed to be free from defects in materials or workmanship for 5 years after original purchase