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Products

The GEMMA range

Every model below is in current production with a standard lead time of 60–75 days. Pricing is quoted per programme — send volumes and we will come back with a figure.

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Four-piston

For mid-motor e-bikes, moped-class builds and off-road use — where two-piston sets designed for acoustic bikes run out of power.

GEMMA G3 Four-PistonNew

G3 Four-Piston

Professional hydraulic disc brake

4-pistonØ180 / Ø203 mmWave rotorMid-motor e-bike
Specifications
GEMMA G3-1 Four-PistonNew

G3-1 Four-Piston

Professional hydraulic disc brake

4-pistonØ180 / Ø203 mmAirflow rotor251 g front
Specifications

With sensor

Motor cut-off sensor built into the lever. Standard for pedelec programmes in most markets.

GEMMA GA-1000

GA-1000

Hydraulic brake with sensor

With sensor3-finger lever315 g/setØ140–180 mm
Specifications
GEMMA GA-1000D

GA-1000D

Hydraulic brake with sensor

With sensor4-finger lever325 g/setØ140–180 mm
Specifications

Without sensor

The same caliper and lever platform without the sensor harness.

GEMMA GA-950

GA-950

Hydraulic brake without sensor

No sensor3-finger lever305 g/setØ140–180 mm
Specifications
GEMMA GA-900

GA-900

Hydraulic brake without sensor

No sensor3-finger lever305 g/setØ140–180 mm
Specifications
GEMMA GA-900D

GA-900D

Hydraulic brake without sensor

No sensor4-finger leverØ140–180 mm
Specifications
GEMMA GA-700

GA-700

Flat mount, hydraulic brake without sensor

Flat mountLow profile280 g frontØ160 / Ø140 mm
Specifications
GEMMA GA-600

GA-600

Hydraulic disc brake (dual piston)

Dual piston2-finger lever316 gPost mount / 51 mm IS
Specifications
GEMMA GA-500

GA-500

Hydraulic brake without sensor

No sensor3-finger lever316 g/setØ140–180 mm
Specifications

Flat mount

Low-profile flat mount for road and gravel frames.

GEMMA GA-700

GA-700

Flat mount, hydraulic brake without sensor

Flat mountLow profile280 g frontØ160 / Ø140 mm
Specifications
GEMMA GA-610

GA-610

Flat mount mechanical disc brake for road bikes

MechanicalFlat mount157 gØ140 / Ø160 mm
Specifications

Cargo & recumbent

Heavier hardware and a lock device mechanism, for recumbent and three-wheel cargo geometry.

GEMMA GA-2000

GA-2000

Designed for recumbent and 3-wheel cargo bikes

Cargo / recumbentLock device529 g/setØ160 / Ø180 mm
Specifications

Levers

Lever assemblies supplied on their own.

GEMMA GA-5D

GA-5D

Lever for e-bike

LeverIntegrated bellAdjustable sensor143 g
Specifications

Mechanical disc brakes

GEMMA GA-320

GA-320

Mechanical disc brake for folding lithium-battery e-bikes

MechanicalFolding e-bikeF 210 g / R 213 gØ140–203 mm
Specifications
GEMMA GA-730

GA-730

Mechanical disc brake for e-bikes

MechanicalE-bikeF 222 g / R 226 gØ140–203 mm
Specifications
GEMMA GA-610

GA-610

Flat mount mechanical disc brake for road bikes

MechanicalFlat mount157 gØ140 / Ø160 mm
Specifications

Pads

Rotors

G3 Four-Piston / G3-1 Four Piston

G3 Four-Piston / G3-1 Four Piston

Lead time 60~75 days

GA-2000

Lead time 60~75 days

GA-500 ~ GA-1000 Series

Lead time 60~75 days

mechanical Disc Brake

Lead time 60~75 days

Need something the range does not cover?

Hose lengths, rotor sizes, pad compounds and sensor options are configured per programme.

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