Trip 100 Bike Computer Manual: Setup, Settings and Troubleshooting Guide

By Logan Fleming

The trip 100 bike computer manual covers everything a rider needs to set up, configure and troubleshoot a basic wired or wireless cycling computer, and this guide walks through those same steps in plain language. By the end, you will know how to install the unit, enter your wheel size, set up speed and distance tracking, use the trip and total displays, and fix the most common reasons a reading stops working. Because the trip 100 is a simple, button-driven device, most of the process comes down to working through a short sequence of settings in the right order.

What the Trip 100 Bike Computer Does

The Trip 100 is a basic cycle computer designed to show the core numbers most riders care about: current speed, trip distance, total odometer distance, elapsed ride time and average speed. It is not a GPS unit and does not record routes or heart rate on its own. Instead, it relies on a magnet mounted to a spoke and a sensor mounted to the fork or frame, so it calculates speed by counting how often the magnet passes the sensor.

Shopping for one? See our guide: 5 Best Computer Mounts for Bike Options for Every Rider (2026).

Manufacturers of simple cycle computers in this class generally specify that accuracy depends almost entirely on correct wheel circumference. If that number is wrong, every speed and distance figure will be off by the same proportion. That is why the wheel-size step is the single most important part of setup.

Before You Start: Tools and Parts Checklist

Gather everything before you begin so you do not have to stop halfway through installation. Most setups need only a few basic items.

• The computer head unit with its mounting bracket
• The speed sensor and the magnet (usually included in the box)
• Small zip ties or the rubber bands supplied with the kit
• A small screwdriver or Allen key if your bracket requires one
• A ruler or tape measure, if you need to check tire size
• Your bike’s tire size printed on the sidewall, such as 700x25c or 26 x 1.95
• The trip 100 bike computer manual or a copy of these steps for reference

Step-by-Step Installation

Step 1: Mount the Head Unit

Attach the bracket to the handlebar or stem, keeping the display where you can read it without looking down for long periods. Tighten it enough that it does not rotate under light pressure, but avoid overtightening plastic parts. Route the sensor cable so it runs cleanly along the frame and cannot catch on the wheel or chain.

Step 2: Attach the Speed Sensor

Clamp the sensor to the fork leg or chainstay, positioned so its sensing face sits close to the path of the magnet. Manufacturers typically specify a gap of a few millimeters between sensor and magnet, so check the manual diagram for your exact model. The sensor should be fixed firmly so vibration does not change its alignment.

Step 3: Mount the Magnet

Slide the magnet onto a spoke on the same side as the sensor and secure it with its clip or fastener. The magnet must pass within the sensing range on every revolution. Spin the wheel by hand and confirm that the magnet clears the sensor without touching it.

Step 4: Connect the Cable

Plug the sensor wire into the head unit, following the connector orientation shown in the manual. Gently tug the connection to confirm it is seated, then secure the cable with zip ties so it cannot pull loose on rough terrain.

Setting the Wheel Circumference

This step controls the accuracy of every distance figure, so take your time with it. The unit needs your wheel circumference in millimeters, and most trip 100 style computers offer a table of preset values for common tire sizes.

Finding the Right Value

Look at the sidewall of your tire. A road size like 700x25c usually corresponds to a circumference near 2105 mm, while a 26 x 1.95 mountain bike tire is closer to 2070 mm. If your exact size is not in the chart, you can measure it yourself: mark the tire on the ground where it touches, roll the bike forward one full revolution in a straight line, and measure the distance between the two marks. Keep the tire at your normal riding pressure while you measure, since a soft tire will read shorter.

Entering the Value

1. Hold the mode button until the settings menu appears.
2. Select the wheel size or circumference option.
3. Use the up and down buttons to adjust the number, then press to confirm.
4. Exit the menu and take a short test ride to verify the reading.

Using the Display Modes

The trip 100 cycles through several screens. Learning them early makes it easier to read your ride while riding.

Resetting the trip values usually requires holding a dedicated button for a few seconds. Do this at the start of each ride so the trip distance and average speed start from zero.

Testing and Calibrating Your Setup

After installation, verify the unit before relying on it for training or navigation. Ride a known distance, such as a measured stretch of road or a segment you have ridden with another device, and compare the readings. If your computer shows a distance noticeably higher or lower than the reference, the wheel circumference value is the first thing to check. Small differences of a few percent are common and usually come from tire pressure or measurement rounding.

If the speed reading jumps around or stays at zero, check the sensor gap first, then confirm the magnet is on the same side as the sensor and is firmly attached.

Troubleshooting Common Problems

No Speed Reading

Confirm the magnet passes within a few millimeters of the sensor on each revolution. Dirt, bent spokes or a loose sensor mount are the usual causes. Make sure the cable connector is fully seated at the head unit.

Erratic or Spiking Speed

This usually means the sensor is picking up a second magnet or interference from a nearby source. Move the magnet to a different spoke if possible, and keep the sensor clear of loose metal parts.

Distance Consistently Wrong

Re-check the wheel circumference entry. Entering the tire width instead of the full circumference is a frequent error.

Display Freezes or Resets

Replace the battery if it is old, and make sure the battery contacts are clean. Low battery power commonly causes the head unit to reset during rides.

Common Mistakes

• Entering the wrong wheel circumference, which skews every distance figure.
• Mounting the magnet on the opposite side of the wheel from the sensor.
• Setting the sensor gap too wide because the magnet looked close enough.
• Forgetting to reset the trip values before a new ride.
• Measuring tire circumference with a soft or underinflated tire.
• Leaving the cable loose so it snags on spokes or the chain.

Tips for Getting the Most From Your Unit

• Keep a note of your measured circumference in your phone so you can restore it after a tire change.
• Re-check the sensor gap after transporting the bike, since mounts can shift.
• Use the total odometer to schedule chain cleaning or tire replacement.
• If you use more than one bike, keep a separate unit or record the circumference for each wheel set.

Recommended gear

If you want a straightforward replacement or an upgrade for a basic setup, the following product types are worth comparing. Check that compatibility with your specific wheel and sensor setup is confirmed before buying.

• Wahoo Bolt Bike Computer is a step up for riders who want more data fields and easier software pairing, which can simplify the setup process compared with a fully manual unit. View on Amazon
• Cateye Velo 7 Bike Computer is a basic wired-style option whose setup steps are similar to the trip 100, making it a practical reference if you want a comparable layout. View on Amazon
• Garmin Edge 130 Plus suits riders who want GPS route tracking and automatic sensor pairing rather than manual magnet setup. View on Amazon

For a broader comparison of options, see Bike Computer Navigation Features Explained and Best GPS Bike Computers for Navigation & Training: 6 Models Compared.

FAQ

Do I need to re-enter the wheel size after changing tires?

Only if the new tire has a different circumference. Swapping to an identical size does not require changes, but moving from a road tire to a wider touring tire does.

Why does my distance read higher than my phone app?

Phone GPS and wheel-based sensors measure differently. Wheel sensors depend on circumference accuracy, while GPS depends on satellite signal and smoothing. Compare over a known measured distance to see which is closer.

How far should the magnet be from the sensor?

Follow the gap specified in your model’s manual. Most simple units work within a few millimeters, and a wider gap causes missed readings.

Can I use the trip 100 with a disc brake wheel?

Yes, as long as the magnet can be mounted on a spoke with clearance from the brake rotor and caliper. Confirm the sensor can align with the magnet path.

What should I do if the unit resets mid-ride?

Check and replace the battery, clean the contacts, and make sure the head unit is not loose on its bracket, since vibration can disturb the connection.

How often should I update the odometer or service intervals?

Track the total distance and schedule maintenance by mileage recommended in your drivetrain and tire guidance. Consider checking with a qualified bike mechanic for service intervals specific to your components.

Can I calibrate the unit to match a GPS device?

You can adjust the wheel circumference until the distance matches a known reference. Repeat the test on a measured course to confirm the setting holds.

Conclusion

Setting up the trip 100 comes down to a few careful steps: mount the head unit, align the sensor and magnet, connect the cable, and enter an accurate wheel circumference. Verify the reading on a known distance before relying on it for training. Keep the manual or these notes handy so you can re-check the settings after tire or bike changes.

Related reading

• Sigma Bike Computer Manual: Where to Find It and How to Use It
• iPhone as Bike Computer vs Dedicated Unit: Which Should You Choose?

About Logan Fleming

Logan puts together our cycling apparel & tech guides, digging through specifications, manufacturer details and owner reviews so you don't have to.