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KBG Terra four-wheel independently suspended electric off-road cycle, full side profile
KBG Terra front three-quarter studio profile Terra front independent suspension head-on — A-arms, coil-over shocks and anti-dive race-car geometry KBG Terra three-quarter view, front suspension and DH tires Terra drivetrain — QS165 mid-drive motor, changeable chain gearing and rear differential in the blue truss frame
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KBG TERRA

A four-wheel, independently suspended electric cycle designed specifically for disabled persons — engineered like a race car for an incredibly stable, go-anywhere ride.

  • Drivetrain: QS165 mid-drive motor with changeable gearing, coupled through a Samagaga rear differential
  • Power: Fardriver ND72450 controller making close to 15 kW continuous
  • Battery: 72V 30Ah 200A BMS li-ion in a bomber, watertight tailored battery box
  • Range: 25+ miles — an additional battery is available to extend it
  • Wheels & tires: choice of 20″ or 24″ wheels on big DH tires
  • Suspension: 7″–9″ of front/rear travel on DVO shocks — bomb downhill or switch to a tunable tarmac mode for urban riding
  • Brakes: 4-wheel SRAM hydraulic disc brakes
  • Race-car geometry: anti-dive front end with adjustable caster/camber, dialed kingpin/caster, scrub radius, roll centers and Ackermann
  • Rock-solid stability: wheels never deviate from track width or go positive-camber through their range of travel
  • Seating: adjustable positions & angles, with a comfortable upright position for those with limited range of mobility
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Engineering

Range & performance

Modeled steady-state road load for the as-spec'd drivetrain — QS165 mid-drive through 5:1 gearing, Fardriver ND72450 controller, 72V 30Ah pack, on 22.68″ (576 mm) tires. Figures below assume a 280 lb (127 kg) machine-plus-rider combined weight.

2,160Wh
Pack energy · 72V × 30Ah
35–50mi
Effective mixed range
~55mph
Top speed · gearing-limited
Steady cruiseRoad loadConsumptionRange
20 mph48 N~26 Wh/mi~83 mi
30 mph85 N~46 Wh/mi~47 mi
40 mph136 N~74 Wh/mi~29 mi
50 mph202 N~109 Wh/mi~20 mi

Method — tractive force F = Crr·m·g + ½·ρ·CdA·v², with battery→wheel efficiency η ≈ 0.83. Inputs: Crr 0.015 (pavement), CdA 0.6 m², ρ 1.225 kg/m³. Top speed from QS165 base RPM (≈4,080 @ 72V) ÷ 5:1 on the 1.810 m rolling circumference, extending to ~60 mph under field weakening. Knobby/off-road tread (Crr≈0.025), aggressive throttle, grades and cold temperatures reduce range 25–40%. The optional second battery extends range close to proportionally.