April , 2026

Hey everyone, Grin will once again be at the SPEZI bike show in Germany, which is coming up next weekend on April 25th and 26th!

It's a late notice but for those in Europe who can make it out you won't find a more dense collection of both eclectic and cutting edge bikes, trikes, and quads under one roof.   We'll be there in two capacities
1) To showcase the All-Axle motor drive platforms and LiGo 10X air travel batteries, and 
2) To help Chargebike showcase the next phase of the Freegen motor project, called MagicDrive!

We've had a jam-packed few weeks machining and assembling various motors and test platforms here in Vancouver that we can take to the show. 

Thanks to Grintech europe, Envo, Geobike, and Chargebike for all helping us pull this together at the last minute. We can't wait to be there and meet with the many mobility innovators on the other side of the Atlantic. 

Battery Lineup Refresh: New Formats, Better Cells, and Some Great Clearance Deals

We've been overhauling our battery catalogue and it's time for a proper update. There's a lot to cover — new form factors, upgraded cells, better safety certifications, and some clearance pricing on outgoing models.

New Large Triangle Frame Batteries — Built Around 21700 Cells

The headline addition is a new series of triangle frame batteries in two sizes, based on the high-energy 21700 cell format. The large pack is the real showstopper: a whopping 31 Ah, 1.5 kWh (roughly 150 km of range, at an assumed 10 Wh/km) in an enclosure that's surprisingly compact. The 21700 cells pack a lot of energy into a tidy space, and the result doesn't look nearly as large as it sounds. 52v 21Ah, 72v 15Ah and 52v 31Ah

Clearance on the Large Fuel Tank Downtube Packs

With the triangle batteries taking over the maximum-range role, we're clearing out the remaining large fuel-tank-style downtube packs at reduced pricing. They're excellent batteries that have powered a lot of long-range builds, but we won't be restocking once they're gone. 72v 19Ah and 52v 29Ah

Across the board price drops and higher capacity cells

We've reduced prices across our entire battery lineup as we move to higher capacity cells. Cell technology has been marching forward and our new stock reflects that — more watt-hours for your dollar than a year ago. If you've been holding off on a battery upgrade, now is a genuinely good time.

UL2271 Certification — Now on Many Models

Regulatory certifications matters more and more, especially for riders whose insurance or building management takes an interest in what they're charging at home or work. A portion of our battery models now carry UL2271 certification to help with those who need it.

Note that this doesn't make them any safer than our non-UL listed batteries, as battery safety is almost entirely based on the cell models used in building the pack.  

Browse All Batteries 

Have you been considering a dual motor ebike build but weren't even sure where to start? We've recently added a whole section to our All-Axle conversion kits page where all the pieces for making dual motor retrofits can be ordered from a single place. 

This includes options for dual all-axle motors, dual left-right single side motors, and even dual motors combining a geared hub with a direct drive hub.  Have a look at this recent video explaining the rationale for various dual motor ebikes that happened to be in our shop, along with an updated explanation of the wiring hookup options for controlling both setups. 

We also filmed a step-by-step video showing a factory ebike upgrade into a dual motor platform to further illustrate the process. 

In this build we started with a fairly generic but underwhelming chinese cargo bike, kept the original rear geared motor and added a powerful front direct drive hub. Further upgrades included torque sensing control, regen braking, double the battery capacity and a larger and more personalized cargo box.

Talk about going from lemons to lemonade and the kids sure agreed!