I've been riding the Crazybird Jumper CB60 for a while now, and overall I think it's a very good e-bike.
The bike has plenty of power, and the pedal assist is smooth, responsive, and consistent. The hydraulic brakes are excellent and provide strong, confident stopping power. The handlebar grips are comfortable, and the fat tyres offer great traction and stability on a variety of surfaces. The front light is bright enough for riding in low-light conditions, and the horn is loud and effective.
The seat is probably one of the weaker points of the bike. It's not terrible, but it isn't the most comfortable for longer rides. Fortunately, saddles are easy to replace, so this isn't a major issue.
The newer display screen is perfectly usable and provides all the information you need, but I personally preferred the previous display as I found it a little easier to use.
One downside is that the wheels do not have quick-release mechanisms. This makes removing the wheels for maintenance, puncture repairs, or transport slightly less convenient than it could be.
The only significant issue I experienced was with the battery charging port. When I went to charge the battery, the charging socket had fallen inside the battery casing, making it impossible to connect the charger. I had to take the battery to a local e-bike technician for repair. From what I could see, the charging port had not been secured particularly well during assembly, which was disappointing on a relatively new bike. Fortunately, the repair was straightforward and the battery has worked fine since.
Despite those issues, the CB60 has been a great e-bike overall. It offers strong performance, excellent hydraulic brakes, good traction from the fat tyres, comfortable controls, a bright front light, and reliable power delivery. If Crazybird improved the charging port mounting, upgraded the saddle, and added quick-release wheels, the bike would be even better.
Overall, I would still recommend the Crazybird Jumper CB60 and would rate it 4 out of 5 stars.
