mobility solutions – from concept to reality

Hase Bikes




The Hase Bikes Trets is a trike, trailer, jogger and buggy, all in one. Adventure shouldn’t have limits when you’re a kid, and the Trets is engineered to provide playful mobility to meet your child’s needs, and adapt with them as they grow. The Trets can easily converted to a pedal-powered trailer*, jogger or push buggy, allowing you to be active together. And for riders 3-foot 3-inches up to 4-foot 11-inches, the Trets pedal Trike offers ultimate stability and freedom.

RAD-Innovations knows how important the childhood year are for all abilities, and has the tools, accessories and experience to match the Trets to the needs of your little one.

Contact us today to find a Hase Bikes dealer near you.

*Optional coupler required



offers playful mobility to meet your child’s needs

Trets Reh

offers even more safety features suited to children with neuromuscular disorders and restricted movement

Adaptable Fit for riders up to 4 ft 11 in (1.5 m) means Trets can grow with them

7-Speed Gearing for easy shifting on a variety of terrain.

Disc Brakes provide consistent control in any weather

Wheel Covers keep wheels safe around small hands and feet

Front and Rear Lights for safety when the sun goes down, and powered by pedaling; no batteries required

Independent Pedaling in trailer mode allows passenger to pedal at their own pace or not at all

Toe Clip and Heel Bungee keep feet on the pedals

Foldable for easy storage and transportation

8-Speed Internal Hub to avoid dropping the chain during backpedaling

Fixed Gear Hub keeps legs moving through the "dead spot"

Cargo Options including seatback Ortlieb bag, fender bags

Guide Bar allows easy steering and control for mom and dad

Jogger Kit mounts handlebar behind seat for active adventures together

Special Children’s Pedals Options offer secure and stable footing

Coupler allows easy connection in trailer mode

  • Total Length
    Trike: 56-69 in (142-176 cm) Trailer: 35-54 in (90-138 cm)
  • Total Width
    30 in (75 cm)
  • Total Height
    34 in (87 cm) / 20 in (52 cm) seat folded
  • Seat Height
    14 in (37 cm)
  • Bottom Bracket Height
    13 in (34 cm)
  • Pack Size
    43-56 x 30 x 20 in (109-143 x 75 x 52 cm) without front wheel; Trailer: 40-54 x 30 x 20 in (102-136 x 75 x 52 cm) without drawbar
  • Wheelbase
    35-49 in (90-124 cm)
  • Frame/Fork
  • Brakes
    Avid BB7 mechanical disc brakes with parking brake mechanism
  • Wheels
    20 in rear, Hubs: Hase Bikes Quickstick, Rims: aluminum double wall with eyelets, Tires: Schwalbe Marathon 47 x 406, Canvas spoke protectors with 3M reflective print, Spokes: DT Swiss; 12 in front, Rim: aluminum, Tire: Schwalbe Big Apple 50 x 203
  • Gears
    7-speed derailleur, SRAM with twist Shifter
  • Crankset
    Aluminum 140 mm 39 tooth
  • Lighting System
    Dynamo: B & M Dymotec 6, Taillight: B & M Toplight Flat Plus, Headlight: Herrmans Front Light H-Diver, LED, standlight
  • Weight
    39.6 lbs (18 kg)
  • Colors
    RAL 6017 may green / powder-coated

Coming Soon!