• Aluminum alloy CNC machined lightweight tensioner arms, derailleur, fixture, and thumb shifter.
• Compatible with P/T Line or Electric P Line frame (A/C Line version is in other listings). Comes with X7 advanced Cog Set on stock wheelset for 7-speed 11-28T (#X7AdvancedCogSet).
• The largest cog is 28T (vs. the original max 18T on P/T Line).
• Titanium Tensioner Spring.
• CNC machined advanced-parallelogram derailleur (spring-activated main body, 2 Jockey wheels, fixture).
• Double tap 7-speed thumb shifter with cable.
• Please find for A/C Line version in this LISTING.

11T Cog Refill:

The “11T cog refill” is a replacement for the smallest cog (the 11-tooth) on the 7-speed cassette. For riders who cover a lot of distance or tend to push hard in higher gears, this smallest cog tends to wear out faster. It’s especially common among heavier riders or those who often stay in the 11T gear for speed.

That’s why we recommend keeping a spare 11T cog on hand, especially if you ride frequently or intensively — it helps extend the life of your drivetrain and keeps your setup running smoothly.

Note :