Echo J7 Cycle Computer Manual May 2026

Find your tire size on the sidewall of your bike tire and enter the corresponding number:

| Tire Size | Circumference (mm) | Tire Size | Circumference (mm) | | :--- | :--- | :--- | :--- | | 12" | 935 | 26" x 1.5 | 1986 | | 16" | 1020 | 26" x 1.95 | 2050 | | 20" | 1450 | 26" x 2.125 | 2070 | | 24" | 1760 | 27.5" (650b) | 2100–2200 (avg 2150) | | 26" | 1950 | 28" / 700c | 2135–2170 (avg 2155) |

(Note: If you want a precise measurement, roll your wheel one full rotation on the ground and measure the distance in millimeters.) echo j7 cycle computer manual

The Echo J7 is a popular entry-level wireless cycle computer known for its large, easy-to-read screen and multi-function capabilities. If you’ve just unboxed yours or are trying to figure out why the speed isn’t reading, this guide covers everything you need to know.

Before setup, ensure you have:

| Feature | Echo J7 | Cateye Velo 7 | Sigma BC 7.16 | | :--- | :--- | :--- | :--- | | Wireless | Yes | Yes | Yes | | Backlight | No | No | No | | Waterproof | Splash-proof (IP44) | IPX4 | IPX7 | | Auto start/stop | Yes | Yes | Yes | | Price range | $15-$20 | $30-$40 | $35-$45 |

The Echo J7 is best for commuters and casual riders who need a cheap, large-display computer without smartphone connectivity. Find your tire size on the sidewall of

Once this is done, you won’t need the Echo J7 cycle computer manual again unless you change tires or replace the battery. The device is famously “set and forget.”