| Wheel Size | Tire Width | Circumference (mm) | | :--- | :--- | :--- | | 700c x 23mm | Road bike | 2096 | | 700c x 25mm | Road bike | 2110 | | 700c x 28mm | Endurance | 2136 | | 26" x 1.95" | Mountain bike | 2050 | | 27.5" (650b) x 2.2" | MTB | 2155 | | 29" x 2.2" | Mountain bike | 2320 |
Pro tip: Roll your bike on the ground, mark one tire rotation, measure the distance in mm, and enter that exact number.
The J7 typically features a sleek design with buttons on the face or sides.
Q: Can I connect the Echo J7 to Strava or my phone? A: No. The Echo J7 has no Bluetooth or ANT+. It is an analog wireless computer. You must manually type your distance into Strava. echo j7 cycle computer manual
Q: Why is my maximum speed showing 999? A: You likely spun the wheel while the bike was upside down during maintenance. Hold SET on the MAX screen to reset it.
Q: Can I use two Echo J7 sensors on one bike? A: No. Two sensors on the same fork will interfere with each other's radio frequency (they use 433MHz, unshielded).
Q: The manual says "Scan." What does it mean? A: Older Echo J7 models require a manual scan. Hold SET and MODE together for 5 seconds. Spin the wheel. The unit will beep when it locks onto the sensor frequency. | Wheel Size | Tire Width | Circumference
| Action | Button | Result | |--------|--------|--------| | Wake up (after sleep) | Press any button | Display activates | | Cycle functions | Short press RIGHT | Changes display mode (DST→MAX→AVS→TM→CLK→ODO) | | Reset trip values | Hold LEFT for 5s | Resets DST, MAX, AVS, TM (ODO remains) | | Clear ODO (rare) | Hold LEFT + RIGHT for 10s | Factory reset (all data erased) |
Auto Start/Stop: The computer starts/stops timing when wheel movement is detected via the sensor.
The Echo J7 may be a basic cycle computer, but it’s reliable when set up correctly. With this guide, you no longer need the original paper manual. Bookmark this page, and you’ll always know how to change settings, reset the odometer, or fix a speed sensor error. Q: Can I connect the Echo J7 to Strava or my phone
Ride safe and track your miles!
Disclaimer: Echo J7 is a generic cycle computer model sold under various brand names. Button labels may vary slightly, but functions remain the same.
No manual needed after this guide. The Echo J7 uses one CR2032 coin cell battery.
Steps:
Warning: Replacing the battery will reset all data—wheel size, odometer, clock. You must reprogram the unit again (see Section 5). To avoid losing ODO, replace the battery quickly (under 10 seconds) or keep a written record.