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Grin Kits

Grin Kits

Standard All-Axle

Our regular All-Axle hub motor kits fit virtually all normal sized bicycles and trikes with both slotted and thru-axle dropouts. At 4kg they are among the lightest direct drive motors in their power class, with the rear models featuring an integrated torque sensor for simplified installation.

Max45 All-Axle

The Grin Max45 is the higher-power All-Axle hub motor: a 45mm stator, up to 2000W, direct drive with regen, for fatbikes, cargo, and high-power ebike conversions.

Dual All-Axle

Dual hub motor ebike kits from Grin: run two All-Axle motors front and rear for two-wheel-drive power, traction, and hill-climbing torque, or two single-sided fronts for trikes and quads.

Configure Step-By-Step

Our new Kit Builder tool walks you through the process of configuring an All-Axle hub motor kit to match your particular bike and then puts all the required items in your shopping cart. This is a great option if you don't know where to start with our regular kit bundles. It currently supports just the Main9 display kits with the bidirectional throttles.

The Grin All-Axle is a direct-drive hub motor designed to fit modern bikes that other hub motors can't. One motor family covers front and rear wheels and every common axle standard, from quick-release to 12, 15, and 20 mm thru-axles, with an integrated torque arm for a secure, no-fuss mount. At 4 kg (6 kg for the high-power Max45) it is lighter than a typical direct drive, with 32-spoke drilling for easy wheel builds and thin 0.35 mm laminations that keep motor drag low when you pedal without assist.

As a direct drive it runs smooth and silent with almost nothing to wear out, so it just keeps going (plenty of riders are past 50,000 km), and its regenerative braking saves brake pads and puts range back in your battery on every downhill.

Not sure where to start? Build a complete kit in our kit builder, check the compatibility guide, compare performance in the motor simulator, browse real conversions in the project gallery, or if you're new to ebikes, start with our Start Here guide.