The magazine Elektrorad puts every year about 100 e-bikes through their paces. And not only by editors, but above all by end customers and in the end, the electric bike has to undergo a test bench that tests range and load limits.

Three E-Bikes from Diamant - Onyx+, Zouma+ and Ubari Deluxe+ - were 2018 test winners with the rating "very good" in all areasThe high quality of Diamant, the reliable Bosch drive, the urban lifestyle design and the overall good equipment pleased the testers particularly well.

Of course, we do not want to withhold these test results:

The premium class Urbanbike, the Diamant Zouma+:

The conclusion of the magazine Elektrorad on the Diamant Zouma +: "Cool first-class urbanbike, cool look, top driving characteristics: highly agile, dynamic, always casual - Diamant delivers a masterpiece with the Zouma +! Super." The first-class interplay of function and form was particularly exciting, together with the agile and dynamic performance of the Bosch Performance Line CX drive. The perfectly crafted frame with the semi-integrated battery, which can be easily removed for charging, and the upright position of the engine ensure maximum agility and sportiness. The equipment with high-quality components such as the Supernova front light, the 3-diode tail light, practical side stand, stylish luggage rack, wide tires and mudguards front and rear were praised by the ambitious test drivers.

Diamant Zouma plus


The pluses of the diamond Zouma + summarized in key words:

  • dynamic driving characteristics and appearance
  • Brake, wheels, frame
  • Semi-integrated battery
  • stylish luggage carrier
  • also suitable for short tours
  • overall concept

The classic e-citybike Diamant Onyx+, also called "Blue Diamond" from Elektrorad:

Above all, the uniform and shapely design inspires the test drivers - frame, luggage rack, the fork tubes of the suspension fork and the cover of the charging socket have the same color, this makes a very harmonious and thoughtful impression. But also the driving characteristics, the perfect tracking even at higher speeds downhill, the harmoniously responsive hydraulic rim brakes and the installed Active Line Plus engine from Bosch received many points from the enthusiastic testers. As a true all-rounder, the Diamant Onyx + turns out not only on smooth asphalt, even on uneven surfaces and cobblestones make the suspension seat post and the suspension fork a good figure. The 8-speed hub gear responds quickly, the drive supports harmonious and quiet.

Getting off this bike is easy thanks to the low entry and the handy pedals, the integrated Supernova lighting, the E-Bike tires with puncture protection and the upright sitting position convey the feeling of safety. The Diamant Onyx + is the perfect e-bike for relaxing trips into the city or rushing to the next appointment!

Diamant Onyx

The pluses of the Diamond Onyx + briefly summarized:

  • the upright sitting position
  • the fully integrated battery into the frame
  • the super light front light from Supernova
  • long mudguards and puncture-proof tires
  • without drive low pedaling resistance


The classic city bike with electric assistance: Diamant Ubari Super Deluxe+


The expectations for an e-bike called Super Deluxe + are high, but the diamond Ubari Super Deluxe + with the beautiful classic color scheme in red could meet all expectations. The spring elements ensure a high level of comfort, while the ergonomic features and hydraulic disc brakes in combination with the Bosch Active Line drive ensure safety in city traffic as well as on long, comfortable exits in an urban environment. The only thing the test drivers complained about was the difficult removability of the battery, which could only be taken with a little effort. The equipment with chain guard, side stand, ergo grips, mud flaps, luggage rack and Vario stem found great appeal also in terms of value for money.

Diamant Ubari Super Deluxe+


The benefits of the Diamond Ubari Super Deluxe + briefly summarized:

  • the Diamant Ubari Super Deluxe+ scores with high driving comfort
  • The engine supports harmonious and very quiet
  • the bike can be driven quite well also without motor support


All three E-bikes from Diamant that have been tested in the magazine Elektrorad can be found in our online shop e-bikes4you.com.If you have any questions or need advice, do not hesitate to call us at +49 8033 978 9020 to send us an e-mail to info@e-bikes4you.com or just use our chat. We are happy to answer any questions you may have.