How to Adjust the Gates Belt Tension on Your Solar Sparrow
The Gates Carbon Drive belt on the Euphree Solar Sparrow is built for smooth, quiet, and low-maintenance riding. Proper tension ensures it performs at its best. This guide walks you through measuring and adjusting belt tension at home using the Gates app and two simple tools.
Watch the Step-by-Step Video
Tools You’ll Need
- 5 mm Allen wrench
- 4 mm Allen wrench
- Smartphone with the Gates Carbon Drive app
- A quiet room for accurate readings
Step-by-Step Instructions
-
Loosen the rear dropout bolts
With a 5 mm Allen wrench, slightly loosen the two bolts near the rear dropout on both sides. Do not remove them.
-
Prepare the Gates app
- Open the Gates Carbon Drive app and select Bicycle.
- Hold your phone with the microphone facing the belt.
- In a quiet room, pluck the belt like a guitar string.
- Rotate the crank a quarter turn and repeat for four total readings.
- Record the average frequency shown in the app.
-
Compare to the recommended tension
The target frequency is 40 Hz. Below 40 Hz means tighten. Above 40 Hz means loosen slightly.
-
Adjust the belt tension
- Using a 4 mm Allen wrench, locate the adjustment bolt under the rear dropout.
- Turn clockwise in small quarter turns on both sides.
- Take four new readings, rotating the crank between each pluck.
- Repeat until the average reaches 40 Hz.
-
Secure the hardware
Re-tighten the dropout bolts evenly on both sides. Your belt tension is now properly set.
Why Belt Tension Matters
- Smoother, quieter operation on every ride
- Extended belt life and long-term reliability
- Better power transfer for efficient pedaling
Need Help?
Our USA-based support team can guide you through the process or recommend a local shop if needed.
Call: 866-729-8075
Email: support@euphree.com
