Off-road kits, and why they are not a hidden street mode

CYC Photon Pro is 3,000 W, peak 4,000 W, 180 Nm, 4.5 kg. The X1 Pro Gen 4 is 5,000 W, peak 6,000 W, 280 Nm, 5.6 kg. Bafang BBSHD is filed at 1,000 W and 160 Nm. These are the motors people mean when they say a conversion can climb anything. They are also the motors a 250 W law does not describe.

What changes besides the sticker

• The pack has to supply the current. A polite 36 V commuter battery is the wrong part.
• Chains, cassettes and spokes become consumables.
• The frame sees loads it was not sold for. A specialist looks at the shell and the dropouts first.
• Heat in the motor and the controller is a design topic, not a badge.
• A street-limited controller is a different product. It needs its own continuous rating and its own cut-off.

The Great Britain checker compares 250 W and 15.5 mph. These kits do not pass it by enthusiasm. Ride them where that power is allowed: private land, closed courses, or a vehicle class you have actually registered.