Workshop notes / Learn
Understand the build.
Start with the decision in front of you. Each guide leads back to a measurement, a part, or a better bike plan.
Buy, convert, or upgrade?
Choose a starting point that fits your riding, budget, and appetite for workshop time.
Read the guideMeasure before you order
The dimensions and model details that make a donor-bike plan useful.
Read the guideRead the specs that need to agree
Volts, amps, amp-hours, and the checks that a nominal voltage label cannot answer.
Read the guideTurn bike measurements into battery space
A practical workflow for the photo ruler, enclosure outline, and cell-layout tool.
Read the guideThe parts a kit price leaves out
Build a shopping list that separates what you own, what is included, and what is still missing.
Read the guideWhat determines real-world e-bike range?
Understand the cubic aerodynamic drag curve, gravitational hill climb physics, battery temperature sag, and how human assist multiplies your range.
Read the guideHub motor or mid-drive for your riding?
Compare mechanical gearing leverage, chain and cassette wear, steep hill climbing efficiency, unpowered drag, and frame compatibility.
Read the guideHub motor torque arms: preventing axle spinout and dropout failure
Understand rotational axle reaction physics, why cast aluminum suspension forks crack, regenerative braking reverse torque, and how laser-cut stainless torque arms protect your frame.
Read the guideE-bike brakes and stopping power: rotor sizing, 4-piston hydraulics, and motor cutoffs
Master the physics of stopping heavy high-speed e-bikes: kinetic energy dissipation (E = 0.5·m·v²), rotor thermal capacity, caliper adapters, and why motor cut-off switches are essential.
Read the guideHub motor wheel building: ERD, spoke geometry, and lacing patterns
Master the principles of lacing large hub motors into bicycle rims: measuring Effective Rim Diameter (ERD), flange PCD, paired hole chords, 1-cross vs Alt lacing, single-butted spoke selection, and lateral tension equilibrium.
Read the guide