VIVI AMAK Series Rear Derailleur Buying Guide

The VIVI AMAK Series rear derailleur replacement is designed for owners of 2024 and later VIVI electric bikes, such as the C26UL, F26FUL, and ACE01 models, whose frame labels begin with "AMAK~". The primary exception is for older VIVI owners with pre-2024 or "SPA~" frames, as these previous generation parts are mechanically incompatible with the newer frame geometry and drivetrain spacing.

Identifying Your VIVI Drivetrain Compatibility

Before ordering a replacement component, you must verify your electric bike's frame prefix and current hardware. VIVI utilizes Shimano entry-level groupset components—specifically models like the Tourney RD-TZ500, RD-TY200, and RD-TY300—depending on whether your bike uses a single-chainring setup with a short cage (SS) or a multi-chainring setup with a long cage (GS). Attempting to cross-reference parts using only generic bicycle terminology without checking the manufacturer frame label often leads to mismatched cable routing or incorrect gear capacity.

The AMAK series hardware relies on a direct attachment (conventional) mount type intended for 6-speed and 7-speed indexing. If your current derailleur suffers from bent cage plates due to accidental drops or impact against the heavy motor hub, swapping it out restores crisp gear shifts. However, if your shifting issues stem from a stretched shifter cable or a bent derailleur hanger rather than the mechanism itself, replacing the entire derailleur body will not solve the underlying problem.

Evaluating Alternatives and Ownership Costs

Finding exact replacements for budget electric bikes can sometimes be tricky through local bike shops, which typically stock mid-tier components rather than proprietary e-bike parts.

The ongoing ownership cost of these rear derailleurs is minimal, hovering around the price of entry-level consumer bicycle components. Because budget derailleurs utilize steel and resin composite structures, they are vulnerable to aggressive impact during urban commuting or trail riding. Routine maintenance involves keeping the 11-tooth pulleys clean of debris and periodically adjusting the barrel adjuster to compensate for normal cable stretch.