Free e-bike tools
15 free tools for e-bike, bike and e-scooter owners, built by a mobile e-bike mechanic in San Clemente. Every calculator prints its arithmetic, every rule cites its source, and nothing asks for your email.
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Diagnose
Figure out what's wrong before you spend money on it.
E-Bike Troubleshooter
Pick what the bike is doing: the checks to try yourself, cheapest first, and what each fix costs.
Open the toolE-Bike Error Code Lookup
Pick your system, type the code: what it means and the maker's first step. Bafang, Bosch, Shimano, Rad, KT, Segway.
Open the toolRepair or Replace?
Is your e-bike (or its battery) worth fixing? A ranked verdict that shows its reasoning.
Open the toolChain Wear Checker
Measure with a ruler or a checker tool; see how worn it is and what waiting will cost.
Open the tool
Calculate
The numbers, with the arithmetic printed so you can check it.
E-Bike Tire Pressure Calculator
Front and rear pressure for the weight an e-bike actually carries, from road to fat tires.
Open the toolE-Bike Range Estimator
Physics, not a guess: assist level, speed, hills, stops, weight, tires and battery health.
Open the toolE-Bike Battery Decoder
Volts and amp-hours to watt-hours, cell count, charge level from voltage, charge time, and whether it can fly.
Open the toolE-Bike Charging Cost Calculator
What a full charge costs on your electric rate, and the cost per mile against driving.
Open the toolGear & Speed Calculator
Gear inches, speed at cadence, and where Class 1, 2 and 3 assist runs out.
Open the tool
Look up & plan
Standards, rules and schedules — sourced, not guessed.
Tire Size Decoder
Any tire marking to its real size — and which tube actually fits.
Open the toolBrake Fluid Finder
The brand on your brake lever tells you the fluid. Mix them up and the brake is ruined.
Open the toolCalifornia E-Bike Class Checker
Class 1, 2, 3 — or legally a motorcycle. The rules that come with each, with the statute cited.
Open the toolBike Fit & Size Calculator
Saddle height from your inseam, frame size, and the kids' bike size chart.
Open the toolE-Bike Maintenance Planner
Your miles, your bike and where you ride in; when each job is due out, from the makers' manuals.
Open the toolE-Bike Surf Rack Fit Check
Your board and your bike in; the rack style that fits and what to watch for.
Open the tool
The arithmetic is printed
Every calculated number has a “how this was calculated” panel, so you can check it — or show it to someone.
Every fact has a source
Standards, statutes and maker specs, linked at the bottom of each tool with the date they were checked.
No sign-up, no tracking
The tools run in your browser. Your inputs are remembered on your device and nowhere else.
Book service
Rather have it fixed?
Takes a minute. You'll hear back within 30 minutes during business hours — and if it's faster to just call, call.
- Free quote before any work starts
- No trip fee in San Clemente, Dana Point or San Juan Cap
- 90 days on all labor
- Nothing gets added to the bill without a call first