Thumb throttle accessory for bikes and e bikes - Fast installation: no handlebar dismantling required. Attaches quickly to almost any speed controller and can be mounted on either side of the handlebar. does not interfere with brake levers or shift levers. - Ergonomic design: comfortable thumb grip suitable for thumbs of all sizes, in all weather conditions, including when wearing gloves. includes a balance spring to reduce thumb fatigue on long rides. - Durable ABS material: made from impact resistant ABS plastic for good strength, resistance to damage and aging, and long service life. - Easy compatibility and mounting: designed to mount on almost any speed controller and on both sides of the handlebar without hindering other controls. - Use scenarios: - Off road and mountain terrain where quick throttle response helps maintain momentum. - City commuting in rain or cold with gloves for reliable control. - Long-distance rides where reduced thumb fatigue improves comfort and endurance.