KEY FACTS

Intelligent automatic transmission with 8 gears
Suitable for e-bikes and bio-bikes
419% total gear ratio and optimum gear steps
One of the lightest automatic gear hubs
No cables, no Bowden cables, no charging
Thru axle compatible
No complicated adapter solutions
Compatible with 6-bolt brake discs
Maintenance-free with lifetime lubrication
Belt compatible
Easy service

FUTURE OF GEAR HUBS

AUTOMATIC

The intelligent automatic takes your driving experience to a whole new level!

The new HUB A8 shifts gears fully automatically and selects the perfect gear based on various sensor values. Simply select your desired cadence in the REVOLUTE app and the HUB A8's intelligent electronics will take care of everything else. Sporty riders can optionally use the REVOLUTE wireless trigger. Choose between automatic, manual or individual modes. In individual mode, a wide range of parameters and features can be customized to suit your personal preferences. The system can therefore work completely independently of the electric drive.

WIRELESS

The HUB A8 shifts gears completely electronically, NO cables and NO charging required.

The electronic shifting does not require an external power supply, e.g. from the e-bike battery. There is also no need to charge the internal battery. The HUB A8 utilizes a tiny part of the kinetic energy of the hub. Thanks to an intelligent control system and various sensors, the hub can decide independently when the optimum time is to charge the internal battery, for example when braking.

This means that no cables or connections are required. The initial configuration after purchase is carried out via the REVOLUTE app. This can then also be used to set the desired cadence.

PLUG AND PLAY

Installing a hub gear has never been so easy — the HUB A8 is ready to use in no time at all!

Whether you have a quick-release axle or UDH standard, installing the HUB A8 is extremely quick and easy. For bikes with a 12 mm thru-axle and the UDH standard, simply replace the original UDH derailleur hanger with an adapter from REVOLUTE and continue to use the original thru-axle. Installation in frames with a 135 mm frame width and a quick- release axle is even easier; here, only the wheel needs to be replaced. Continue to use the original quick-release axle here too.

No cables or Bowden cables need to be installed! You also don't have to install a complicated adapter solution on the brake to support the reaction torque!

Configure the HUB A8 in minutes with the REVOLUTE app and you can start your first tour

MAINTENANCE-FREE

You don't have to worry about anything except riding and having fun.

The HUB A8 is supplied with a lifetime lubrication. You don't have to worry about anything else. All electronic components are also installed inside the housing and protected from harmful environmental influences. The technical design also eliminates the need for any adjustment or calibration work.

Service

The HUB A8 is specially designed for easy, quick, and inexpensive servicing. Thanks to its clever design, servicing can be completed in just a few simple steps. The relevant components of the gearbox can be replaced directly at the dealer or service partner.

ADVANTAGES

Low service costs: No need to send the entire wheel for servicing.
Highest customer satisfaction:End customers appreciate simple, comprehensible solutions, which increases brand loyalty and trust.
Modular concept: E-UNIT and GEAR-UNIT can be replaced separately in a short time.
Fast service: If the dealer has replacement parts in stock, the customer can continue riding on the same day
Ecological: In case of service, it is not necessary to replace the entire gearbox.

PROCEDURE

Remove pinion or pulley
Open cover with COVER-TOOL
Open nut with socket wrench
Remove GEAR-UNIT and E-UNIT
Replace E-UNIT or GEAR-UNIT
Reassemble in reverse order

Specifications

specifications

Number of gears	8
Gear Shift	Automatic (optional manual via wireless trigger)
Overall gear ratio	419 %
Maximum input torque	120 Nm
Use in e-bikes	Yes, according to DIN EN 15194:2018-11
Compatible frame widths	135 mm O.L.D.
	142 mm with UDH
	148 mm with UDH
Axle	Original thru axle / quick release axle
Torque Support	using 135 mm adapter
Torque Support	using 142/148 mm UDH adapter
Number of Spokes	32 or 36
Spoke flange distance	54,5 mm
Spoke hole diameter	2,9 mm
Spoke flange width	3,2 mm
Hole circle diameter of the spokes	118 mm
Rim sizes	20″ and larger
brake discs	All 6-hole brake discs
Brake disc bolt length	10 mm
Torque for brake disc screws	Manufacturer's specifications, but max. 6.2 Nm
Brake disc sizes	160 mm or larger
Primary transmission ratio	2 or greater
Pinion Mount	9-Spline
Chainline	135 mm: 45.5 mm (45.5–51 mm with spacer)
	142 mm: 45.5 mm (45.5–51 mm with spacers)
	148 mm: 42.5 mm (42.5–48 mm with spacers)
Temperature Range	−20 °C to +50 °C
Lubrication	Grease (lifetime filling)
Wartung	Not necessary
Weight	~1.8 kg including integrated electrical circuitry
Color	Matte black