Giant Bicycles - The Giant Rivet TT helmet also sports the Kona theme with a pattern of green and blue, representing the mountains and sea, stretching down the side. | Facebook
![Best time trial helmets: 5 aero TT helmets put through their paces in real-world testing - BikeRadar Best time trial helmets: 5 aero TT helmets put through their paces in real-world testing - BikeRadar](https://images.immediate.co.uk/production/volatile/sites/21/2019/03/best-tt-helmets-giant1-1541162387259-1stvgj3ke8trt-1541173004417-1q4dv1eb5d4m6-dc5fc77.jpg?quality=90&resize=960%2C540)
Best time trial helmets: 5 aero TT helmets put through their paces in real-world testing - BikeRadar
![Giant Rivet TT Time Trial / Tri Helmet Small 51cm - 55cm 2019 - £59.99 | Helmets - Time Trial/ Aero | Cyclestore Giant Rivet TT Time Trial / Tri Helmet Small 51cm - 55cm 2019 - £59.99 | Helmets - Time Trial/ Aero | Cyclestore](https://www.cyclestore.co.uk/images/products/xtra/76628.jpg)