Diamant Opal Esprit+ (Einstieg: mittel)

The "Opal Esprit+ (Entry-level: medium)" model from Diamant, released in 2022, is a high-quality e-bike that stands out for its technical features and carefully selected components. Priced at 4,369 EUR, this bike offers a combination of performance and comfort designed for the discerning cyclist.

The Opal Esprit+ frame is a high-performance hydroformed e-bike frame with a removable integrated battery (RIB). The frame is fitted with Motor Armor and internal cable routing, and features a post-mount disc brake mount. The maximum permissible weight is 136 kg, which is indicative of its robust construction.

The braking system consists of hydraulic disc brakes from Shimano or C-Star Power, depending on availability, with 180 mm brake discs. The brakes are identical at both the front and rear and offer reliable braking performance. The gear lever is an Enviolo Trekking manual twist shifter, which allows for precise gear control.

The fork is an aluminium rigid fork with lowrider eyelets and a Bontrager thru-axle, which ensures stability. Safety when cycling at night is ensured by the Herrmans H-Black MR8 E LED front light and the Spanninga Solo rear light. The non-slip aluminium pedals with reflectors contribute to safety.

The drivetrain consists of a Gates CDX system with a 22-tooth steel sprocket. The handlebars are aluminium low-riser bars with a diameter of 31.8 mm, 25 mm rise, 11-degree bend and a width of 660 mm, complemented by Bontrager Satellite Elite grips. The stem is a Bontrager Comp, Blendr-compatible, with a 7-degree angle and a length of 90 mm.

The bike is fitted with Bontrager E6 tyres, which feature Hard Case Lite puncture protection and reflective strips. The wheelset consists of Alex MD35 rims, which are tubeless-compatible, and sealed bearings from Bontrager. The saddle is a Selle Royal Vivo Moderate Ergo, mounted on a Bontrager aluminium seatpost.

Other features include SKS plastic mudguards, a Pletscher Comp Flex 18 kickstand and a lightweight aluminium luggage rack with the MIK system, which can carry loads of up to 25 kg.

The Opal Esprit+ is powered by a Bosch Performance CX motor with a magnesium housing, which delivers up to 250 watts and 85 Nm of torque and provides assistance up to a speed of 25 km/h. The battery is a Bosch PowerTube with a capacity of 625 Wh and is charged using a Bosch standard charger (4A). The Bosch Intuvia display with remote control allows for easy operation and monitoring of ride data.

The bike’s geometry includes a seat tube length of 49 mm, a top tube length of 59 mm, a head tube angle of 70 degrees and a seat tube angle of 73 degrees. The wheelbase is 113 mm, which ensures a stable ride. With these features, the Diamant Opal Esprit+ offers a well-balanced riding experience for both urban and rural environments.