GB350

Gear ratio : 1:20 Weight : 40.0g/pcs

GB640

Gear ratio : 1:28 Weight : 66.9g/pcs

GBR640

Gear ratio : 1:28 Weight : 66.9g/pcs

GB528

Gear ratio : 1:26 Weight : 59.2g/pcs

GB528S

Gear ratio : 1:26 Weight : 58.9g/pcs

GBS510

Gear ratio : 1:22

GB720

Gear ratio : 1:20

GB720W

Gear ratio : 1:20

GB720B

Gear ratio : 1:20

GB707

Gear ratio : 1:20

GB1

Gear ratio : 1:21

GB2

Gear ratio : 1:26