Question 1

After pressing the shifter lever, the rear derailleur does not shift normally

Accepted Answer

1.Check the button indicator light: If there is no light, replace the battery and test again. 2.Check the light color: If the button is lit but not green (e.g. red or yellow), the device is not paired correctly. Re-pair following the manual.

Question 2

The device cannot shift immediately after not riding for a long time

Accepted Answer

1.Charge the system — a low battery can delay activation 2.Gently shake the frame — this helps wake up the rear derailleur more quickly

Question 3

The rear derailleur position is inconsistent with the APP display

Accepted Answer

1.Go to the initial calibration page in the APP 2.Select the rear derailleur (upper section) 3.Press the right arrow (▶) and hold until the RD moves back to the smallest cassette

Question 4

How does the rear derailleur linkage function work with limit function enabled?

Accepted Answer

When the FD is on the large chainring, RD is below 3rd gear, and limit is enabled: RD Upshift: System executes an RD upshift once every 0.5 seconds. RD Reaches 3rd Gear: The RD upshifts until reaching 3rd gear. FD Downshift: Once RD reaches 3rd gear, system waits 2 seconds before executing the FD do

Question 5

How to do the initial calibration?

Accepted Answer

For EDS TX series: Set the front derailleur to the largest sprocket Set the rear derailleur to the smallest cog position Open the WHEELTOP App → Initial Calibration Use "<" or ">" buttons to align the RD pulley with the smallest cog Exit the initial calibration page For EDS GeX and OX series: Same s

Question 6

Why are there 6 gear values for FD fine-tuning? What do they mean?

Accepted Answer

Gear 1st: Press and hold left shifter — FD moves from small to large chainring. Gear 2nd: FD on large chainring, RD on smallest 6 cogs — fine position value. Gear 3rd: FD on large chainring, RD on largest 6 cogs — fine position value. Gear 4th: FD on small chainring, RD on smallest 6 cogs — fine pos

Question 7

What should I do if the derailleurs are stuck or can't shift?

Accepted Answer

Use the "Initial Calibration" function in the WHEELTOP app to adjust the front derailleur. Adjustment must always start from the default position. Correct default position: Set the FD at the largest chainring position Set the RD at the smallest cog position Use the initial calibration function in th