Classified Powershift Boost Hub Gear 

The CD 27 gearbox for frames with a Boost 2x148mm mounting width and a mount for Powershift cassettes 

The gear system of the Classified Powershift gear hub shifts between a standard 1:1 gear ratio and a 0.7:1 reduction ratio. Designed for drivetrains with a single chainring, the gear ratio then corresponds to that of a double chainring set.

A 1x drivetrain with a 52-tooth chainring thus offers the gear range of a 52-36 double crankset; a 1x drivetrain with a 50-tooth chainring corresponds to a 50-35 range, one with a 48-tooth chainring corresponds to a 48-34 range, and so on...

Included in delivery:

• Powershift Classified CD 27 hub gear, Centerlock lockring, hub body lockring

Classified Powershift gear hub dimensions and specifications:

• Application: Road, Gravel, MTB
• 2 gears with 1:1 and 0.7:1 gear ratios
• Shifting under full load up to 1500 W
• Instant shifting <150 ms
• Efficiency 99%
• For disc brakes, Centerlock brake disc mount
• Mounting width: 12x142mm thru-axle mounting
• Weight: 489 grams, manufacturer’s specification
• Also compatible with Shimano Di2 and TRP Vistar shift levers

Classified Powershift gear hub:

With the CD27 drive mount, you can use both 10-tooth and 11-tooth small sprockets, provided you use the appropriate cassette spacer and the correct retaining ring. The drive mount has a diameter of 27 mm, allowing the smaller 10-tooth cassette to be fitted.

Classified Powershift technology offers a technical alternative to traditional 2-speed drivetrains with a front derailleur. By integrating a wireless 2-speed shifting mechanism directly into the rear hub, the function of a front derailleur is completely replaced. Gear changes occur virtually without delay and are possible at any time, even under heavy load and on varied terrain. The absence of a front derailleur significantly reduces aerodynamic drag. At the same time, the constant chainline eliminates cross-chaining, leading to a measurable increase in efficiency and reduced wear. The use of larger chainrings eliminates the need for small gear ratios, which has a positive effect on durability, power transfer and system efficiency.

The (separately available) thru-axle features a rechargeable battery and, thanks to Bluetooth technology, enables lightning-fast gear changes of under 150 milliseconds. Two different shifters are available for flat and drop bars. The Powershift hub features a special cassette mount. Standard third-party cassettes are not compatible. A wide selection of compatible Classified cassettes enables gear ratios of up to 583%. Hub bodies are available in versions for straight-pull and J-bend spokes.

Compatibility:

No modifications to the frame or dropouts are required to install the Powershift system.

The Powershift hub is compatible with all standard 11-, 12- and 13-speed shifting systems from SRAM, Shimano and Campagnolo. For Shimano Di2 12-speed shifting systems, full integration is possible, allowing the Powershift hub to be shifted using standard shift-brake levers. When selecting the Classified cassette, the maximum sprocket capacity of the rear derailleur must be taken into account.

A particular highlight: when the Powershift hub is combined with TRP’s VISTAR groupset, the QuantumShift system enables simplified shifting for improved concentration. QuantumShift uses the rear derailleur, 12-speed cassette and Powershift hub to create 16 unique gears (15 for gravel), all controlled with a single hand on the shifter.

What components are required?

The hub gear is the heart of the Powershift system. The following components are required for installation:

• Classified hub gear
• Classified hub body with lockring
• Classified Smart Thru Axle
• Classified torque arm
• Classified cassette
• Classified Ring Shifter or Classified Control Unit with switches
• Possibly spacers for torque arm and thru-axle

Your choice of wheel with Powershift hub:

Ask us for a personalised quote. We will lace your chosen wheel, perfectly centred by hand. Select your preferred rim from the complete range of DT Swiss, e*thirteen, Mavic, Stans NoTubes and WTB rims. We use exclusively DT Swiss spokes. Over the last few decades – ever since we started building wheels – these spokes have proven themselves to be by far the most durable.

Herstellerinformation: Classified Cycling, Damplein 23, 2018 Antwerp, Belgium, https://www.classified-cycling.cc/