Bonnell

Bonnell's 775 family puts a mid-drive motor into a downhill mountain bike chassis, so most of what wears out is a bicycle-world component you can identify by name and size. There are three models to keep straight. The 775 MX runs a CYC X1 Pro Gen 4 drive with an A65 series 1300 Wh battery and a KMC e1 single-speed chain. The 775 AM and AM Touring share a CYC Photon Gen 1 drive, rated at 1200 W peak and 110 Nm, an A-Series battery in 520 or 780 Wh, and a 10-speed KMC e10Sport chain.

A lot is shared across all three bikes. Every 775 stops on Magura MT5 four-piston brakes, which take Magura's MT pad shapes, and every one rolls on a mullet layout with a 29 inch front wheel, a 27.5 inch rear and 2.5 inch tires. Rotors differ slightly by model: the MX uses Magura MDR-P discs while the AM family uses MDR-C, both 220 mm front and 203 mm rear.

That split is the useful shortcut when you shop. Brake pads, fluid, tires and tubes mostly cross over between models, while the chain, battery and rotor type depend on which 775 you ride. Each part page lists the exact models it has been checked against. WiredWhips carries parts for many electric dirt bike and e-moto brands, and this page collects the ones that apply to Bonnell owners.