This thesis presents a modular accessory system designed to promote bicycle helmet usage in the Netherlands. The project aims to address the barriers to helmet usage by integrating functional, customizable, and attractive helmet accessories that align with the needs and preferences of young urban cyclists.
Through extensive research involving context research, helmet product analysis, and user research, the study identifies key factors influencing helmet use, including social norms, potential functions, and problems of helmet products. Social norm is the most influencial factor among them, which indicates that the low helmet acceptance is not merely due to dissatisfaction with functionality but is influenced by multiple social norms. This explains why conventional helmet designs often fail to attract users. A further case studies is conducted to identify effective design strategies targeting young urban populations.
The modular system incorporates clip-on connection system with four accessory modules. The connection system uses a unique magnetic clip structure that is easy to operate and ensures a secure fit. The four accessories, including a rain hood, visor, head lights, and earphones, tailored to target user needs and preferences to enhance convenience, safety, and personalization. By addressing functional shortcomings and leveraging the appeal of customization, the modular accessory system aims to shift social perceptions of helmet use, making it a more integral part of the cycling culture in the Netherlands.
Additionally, the scalability of the project contributes to the further service system development and commercialization plan to support future market development.

This graduation project aimed to design a wireless charging solution for charging E-bikes in two-tier bicycle racks. The starting point of this project was the ‘Charging Kickstand’ from the Delft-based start-up ‘TILER’. This Charging Kickstand, when mounted and connected to any E-bike, is typically placed on top of a TILER ‘Charging Tile’ when the E-bike is parked. Within the context of this graduation project, two-tier bicycle racks, as commonly found at public locations such as train stations, forcing users to put their kickstands down to the ground to charge their E-bikes in addition to already placing their bikes within these racks is cumbersome and not a viable solution. Therefore, the main aim of this project was to develop a solution that utilized the same Charging Kickstand for wireless charging, without requiring users to perform any additional steps compared to regularly parking their bikes in two-tier bicycle racks.

The biggest challenge within this project was to design a charging solution that would not obstruct the bike when entering the bicycle rack. The Charging Kickstand is mounted in the exact location that any other kickstand would be on an E-bike: at the center between the pedals or at the rear of the bike on the chainstay. For a wireless charger to end up next to the kickstand when the bike is placed in the bicycle rack, it was determined that it would always cross paths with the pedals and cranks of the bike, possibly causing a collision or preventing a bike from entering the bicycle rack, which would result in the bicycle rack failing at its primary goal of storing bikes.

Through an exploratory initial prototyping and ideation process, two methods for preventing pedal collision were identified and tested:
1. Ensuring a pedal position upon entering the bicycle rack so that the pedals would move over the charger.
2. Having the charger ‘rest’ in such a position that it would not collide with the pedals and then automatically moving the charger itself towards the Charging Kickstand when the bike is placed all the way in the bicycle rack.

Both approaches proved to be unsuitable due to tight spatial margins within two-tier bicycle racks. It was then concluded that this project would result in a charging solution in which pedal collision is inevitable.

The resulting final design is a charger that can be pushed all the way flat to the ground by the pedals upon collision, allowing the pedals to pass over it. After being passed by the pedals, the flexible hinging mechanism on which this charger is placed causes the charger to spring back up to its upright charging position, giving this design the fitting name ‘TILER UP-Charge’.