mobility solutions – from concept to reality

Hase Bikes




The most unique and adaptable performance trike in the Hase Bikes lineup, the Kettwiesel is the Swiss Army Knife of recumbent trikes. Stability, safety, handling and comfort are unparalleled by other delta trikes, as is the utility and customization engineered into the Hase Bikes Kettwiesel. From family outings to the daily commute and off-road adventure, RAD-Innovations is capable of matching and adapting the right Kettwiesel to fit your needs.

The Kettwiesel is fully customizeable. Start with one of the base models, and build your Kettwiesel. Adaptive / inclusive options available for a variety of abilities and impairments. Want something you don’t see? Just ask.

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

Emily's First Bike



blends performance and affordability.


features full suspension for a smooth ride when the pavement ends.


suspension, differential and knobby tires ready for your offroad adventure. Custom order.


takes comfort and practicality to the next level with suspension, a higher seat position, smaller front wheel and a folding frame.


provides all the utility and performance with a hand-drive system. Custom order.

7005 Series Aluminum Frame offers strength and stiffness in a lightweight package

Adaptable Fit for riders 4’6” to 6’7” (1.45m to 2.00m) means there’s no guessing when it comes to sizing, and the Kettwiesel has the ability to grow with younger riders

Adjustable Seat allows full range of sitting comfort from upright to laid-back, high to low, via convenient quick-release levers

Gearing Options start with a 9-speed rear cassette and can be expanded to 27 speeds with the addition of a front derailleur*

Disc Brakes provide consistent control in any weather

Hase Quickstick Hubs make wheel removal easy for transport, storage or repair

Fenders keep the elements and dirt at bay

Selection of High Performance Schwalbe Tires offer excellent grip on-road or off*

* optional upgrade

Rear Differential provides maximum traction on any surface, at any angle

Custom Gearing including front derailleurs, internal hubs and gear reduction to provide the right range to tackle any terrain

Cargo Utility with the addition of panniers and roller bags

Electric Assist amplifies your output thanks to a 350-watt Shimano STEPS motor

Hand Cycle option allows you to choose how you put the power down

Suspension options including front fork and rear shocks for a smooth ride when the pavement ends

Foldable Fairing for increased aerodynamics and protection from the elements

Tandem Option allows connection to other bikes or trikes

Foldable Option makes storage and transportation a cinch

  • Total Length
    63-81 in (160-205 cm)
  • Total Width
    34 in (86 cm)
  • Total Height
    31 in (80 cm), with seat folded down: 21 in (53 cm)
  • Turning Circle
    left 10 ft 10 in (3.30 m), right 11 ft 6 in (3.50 m) at mean length Adjustment
  • Seat Height
    18 in (46 cm)
  • Bottom Bracket Height
    ~18 in (47 cm)
  • Pack Size
    63-81x 21x 34 in (160-205 x 53 x 86 cm)
  • Wheelbase
    46-64 in (116-162 cm)
  • Frame/Fork
    7046/7005 aluminum
  • Front Boom
    6061-T6 aluminum
  • Brakes
    Avid BB7 mechanical disc brakes with parking brake mechanism
  • Wheels
    20 in, Hubs: Hase Bikes Quickstick, Rims: double wall with eyelets, Spokes: DT Swiss, Tires: Schwalbe Marathon 47 x 406
  • Gears
    9-speed Shimano Sora, SRAM with Centera twist shifter
  • Crankset
    Truvativ Touro 52 tooth
  • Lighting System
    Dynamo: B & M Dymotec 6, Taillight: B & M Toplight Flat Plus, Headlight: Herrmans Front Light H-Diver, LED, standlight
  • Fenders
  • Weight
    39.4 lbs (17.9 kg)
  • Colors
    dormant red / powder-coated

Coming Soon!