
Special accessories
The Hase is in the details
HASE BIKES makes the seemingly impossible possible. For us, it’s the most normal thing in the world that people with physical or mental disabilities can enjoy cycling. HASE BIKES was founded 25 years ago in order to make this possible. Therefore, over the years, we have developed not only our special trikes and tandems but also a lot of accessories that compensate for various physical limitations or offer special protection. Whether you plan to ride alone or with a partner or two.
Our special accessories
Pedals accessories

Crank with adjustable length
This crankset for the front rider has crank arms that can be quickly adjusted to the leg length of the rider. No tools required! This is useful for therapeutic purposes, but also makes it possible for the smallest co-pilots to help with the pedaling. If you’re riding solo with the PINO in cargo-bike mode, the crankset can be positioned under the Porter Bag with the crank arms pushed all the way in!
Crank Shortener with angle compensation
The Crank Shortener makes it possible to freely adjust the length of the crank arms, e.g. for riders with legs of different lengths. The forged part not only looks good but also is more robust and can even be properly aligned on offset crank arms.
Pendulum Pedal with angle compensation
The Pendulum Pedal can help riders with severely limited knee and hip joint movement to slowly regain their mobility. The design of the Pendulum Pedal has been slightly updated, and a new hole has been added. This hole can be used for reaching the bolts of the Crank Shortener, which saves time and hassle when removing the accessory or making adjustments.
Special Pedals
We designed our Special Pedals in cooperation with Ergodynamik Busch. They are perfectly adjustable to all needs and preferences: For starters, they fit an impressive range of shoe sizes, from US kids’ 1 to US men’s 16 – which makes our pedals unique. And the angle to the direction of travel can also be adjusted over a very wide range. Once the pedal has been adjusted, it’s easy to fasten and release the strap with a single hand. The foot is held comfortably and securely in the proper position. The pedal is also suitable for riders who pedal with their heels.
Calf Support
The Calf Support was also designed for use with the Special Pedals. What makes it so special: In spite of the firm leg support it provides, the ankle joint – thanks to an adjustable elastomer spring – remains flexible, allowing for a circular pedaling motion. This is important because, when a joint is immobilized, the muscles atrophy.

Pedals with Toe Clips and Straps
The toe clips hold the front of the foot securely, keeping the foot in the correct position. The elastic cord around the heel prevents the foot from slipping. Also available in a children’s version.

Pedal Axle Extenders
The pedal axle extenders moves the pedal outward by 1,18 inch (30 mm) and is mounted between the crank and pedal. It is used for people with very wide shoes or slight internal or external rotation of the feet, for which the distance of the pedals to the pedal crank without pedal axle extension is too small.
Seat accessories
Headrest
For big and small, for trikes and tandems: The Headrest can be attached to the back of the recumbent seat and offers extra comfort for the rider. If side support is also needed, the wings on the right and left can be folded forward to hold and protect the rider’s head. In the third position, it becomes a neck support – e.g. for helmet wearers.

Harness System
The Harness System with magnetic buckle and child-proof buckle guard is flexible and easy to open and close. It can be used as a combined lap and shoulder restraint or, with an additional strap between the legs, as a 5-point harness. (optional pads)

Lap belt
For all riders whose physical condition puts them in danger of slipping or falling out of the seat when riding or braking.

XXL Seat
Optional equipment
The KETTWIESEL seat is also available in XXL. It offers extensive adjustability and has an extra 2¾ inches (7 cm) of space to comfortably accommodate riders of all shapes and sizes.

Seat Extension
The extension option for our standard seat increases the seat size so that your weight is distributed more evenly over a larger surface area. For people with disabilities or large riders. Not compatible with TRIGO or TRETS.
Other accessories

Armrest
The comfortable armrest allows for a relaxed posture if a rider cannot hold the weight of their arm without support.

One-Sided Leg Support
Our solution for people with one-sided paralysis or disability. The healthy leg pedals, while the other is strapped comfortably and securely in place.
Turn Signal System
More attractive, durable, and sophisticated: The redesigned Turn Signal System with hazard-light function. It also provides the rider with a visual and acoustic signal when it’s blinking. The battery-powered system is attached to the seatback, and the controls to the handlebar grips – either one button on each side or both buttons on a single grip.
Telescopic Safety Flag with Mount
The telescopic pole with the yellow flag has a high-quality design. It can be mounted securely to the trike using a special HASE BIKES bracket. This safety accessory is also compatible with the Foldable Fairing and the Rain Cover for the seat.

Gear hub with freewheel switch-off
Small Shifting Ring, big effect: Thanks to the HASE BIKES accessory for the Nexus hub, it is possible to effortlessly switch from a fixed gear to an 8-speed drive with a freewheel mechanism, and back again.

Extra-Long Handlebar Grips
The Extra-Long Handlebar Grips for the KETTWIESEL and LEPUS are 16 inches (40 cm) longer than the standard grips. This is ideal for people with very short arms.

Single-Hand Controls
A single grip with all control elements! Using a special adapter, two brake levers can be mounted on one side. This allows the rider to shift gears and control both brake levers using a single hand.
Hand-Crank Assembly PINO
Optional equipment
The crank for anyone who would like to help with the pedaling in the front seat of the PINO in spite of limited leg function. The Hand-Crank Assembly is height-adjustable and can be folded forward when the rider is getting into and out of the seat.

Ergonomic Push Bar
If a triker needs a little help getting their wheels rolling, e.g. because they are riding without a freewheel mechanism: The Ergonomic Push Bar not only helps the triker, but also prevents strain on the hands and wrists of the person doing the pushing. Not compatible with TRIGO or TRETS.

Steerable Guide Bar
The steerable Guide Bar with brake lever gives the support person full control of the trike, but they can turn this control back over to the rider at any time.

Hydraulic Coaster Brake
Optional equipment
If the legs are more mobile than the hands, the coaster brake ensures full braking power – with high tech: Pedaling backwards transfers the leg power to a hydraulic disc brake.

Trailer Kit
Optional equipment
With the Trailer Kit, even normal upright bikes can be used for towing a TRIKE. The integrated overrun brake system works automatically: When the towing bike brakes, the TRIKE brakes with it.

Safety Cover for Wheels
Prevents riders from coming in contact with the wheels or brake discs – for extra safety.

Holder for Walking Stick
Just place the walking stick or cane in the holder, secure it with the clamp, and you’re ready to go. Multifunctional.