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Home > > FIRST's Giant Cog for Shimano's Cassette
FIRST's Giant Cog for Shimano's Cassette
Date:2015-05-15        Hits:867        Back
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Offering your existing 11-34 or 11-36 speeds to a wider gear range, 11-40 or 11-42.

Model No.: Y80A
Material: AL7075
Option: 40T/42T

This video shows the verification for our cogs of 42T & 40T. Even the huge eccentric degree caused from the climbing up from 36T to 42T makes the dropping and climbing of chain a big challenge, our unique design overcomed the problem and makes both the dropping and climbing for chain an easy and smooth action.