| Brand | First Components |
|---|---|
| Number of Teeth | 42 Tooth |
| MPN | CS201Z00 |
| Part Type | Cog |
Check the listing for details. First Components 10 Speed Expander Cog 42t Conversion. Condition: New. Listed at 50.00 USD. This cassette expander cog will turn your Shimano 11-36 XT or XTR cassette into an 11-42 allowing for a much lower climbing gear. First Components kindly include a longer B-limit screw to allow your derailleur clearance to enter the 42T cog.
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