April , 2023

We've spent a busy winter doing lots of tests and experiments with torque arms, axles, and regen, and it's been most revealing. You can count on us making a video soon that dives into all these gory details.

But first, time to talk about the fruits we have to show for it! There are now 3 new torque arm models in production here at Grin, taking advantage of both our improved knowledge from all the testing and enhanced manufacturing facilities.

Torque Arm V5 takes the convenient eyelet mounting of our V2 arm, but adapts it to work on both front and rear hubs with any dropout angle using a splined insert. It also has a stronger linkage arm less liable to slip. This is the perfect choice for bikes with fender or rack eyelets.

Torque Arm V6 is an ideal option for frames that don't have eyelets near the dropouts. This attaches to any frame tubing using our machined frame clamp assembly that can swivel and slide to line up with any arm position.

Both the V5 and V6 arms include tight-fitting inserts for M12 and M14 axles made of especially tough 17-4 stainless steel alloys. This material is hard as rock and provides over 80% more spinout strength than the more common 304 stainless. It survives all testing unscathed even while axles shear right in half.

Finally, our Torque Arm V7 addresses hub motors with regenerative braking. Particularly geared motors with M12 axles which are notoriously difficult to keep in place. An entire clamping block assembly machined from 17-4 stainless can compress the axle with several thousand pounds of preload force.

These arms are available to purchase by themselves or included in conversion kits. We've even got fully detailed installation guides hot off the presses. 

We released a video last month showing how to modify standard geared hub motors to disable the clutch and make them regen capable.  

This can bring the benefits of regen to geared motors outside of just the GMAC system, including smaller and lighter hubs like the Shengyi SX1/ SX2 motors.

Excited but don't have access to a TIG welder? Fear not, we're now offering these motors pre-modded for regen here at Grin! That includes

• Bafang G60 and G62 Fabike Kits.  Now you have excellent options for powerful regen capable hub geared motors on fatbikes with 170-190mm rear dropouts.  
• Shengyi SX1 and SX2 Kits. These lightweight front and rear geared motor kits are the perfect option for commuter setups that don't need the power and weight class of a GMAC motor. And the benefit of a helical cut gear makes them extra quiet too. 
• Front eZee kits.  And finally we've got a good supply of eZee motors without clutches for those wanting a hub that is in the GMAC motor power class, but for a front installation rather than the rear. 

All of these hub motor options at their base are using threaded M12 axles with axle flats. Our ability to offering these systems was also contingent on our release of the new V7 Clamping Torque Arm.  (More information on our new torque arm series coming next!)

With the help of eevee's PEV shop we've now added four XLR charging adaptors to our lineup, allowing a host of electric unicycles, skateboards, and scooters to take advantage of the Satiator charger with a ready-made cable.  These GX12 and GX16 plugs have become quite common in this industry, and while not quite converging to one 'standard' there are at least enough models using 3, 4, and 5 pin plugs to justify us making a cable for each!

Our resident technician and UEC aficionado Gordon partnered up with Cole at eevee's to film a little video on the Satiator which you can view here.

You can get the 72V Satiators with GX12/GX16 adaptors directly from our store page, or at eevee's shop where they can preload profile settings to match your PEV.

This project took longer than anticipated as field testing showed some strange charge behaviors with certain EUC models, and that required some algorithm changes and new firmware to fully iron out. So if you get one of these cables for an existing Satiator, be sure to update to the latest 1.039 firmware as well.