Tangent, Rev 1.1

The initial shipment of customer drives has been a success, but we're not stopping with good enough. Let's see what's been improved in the last 4 weeks...

The test mule that won't quit. Long live the Stinky!

-improved chainline. The drive has been shifted within the mounts so the motor chain uses the inner chainring position. More adaptability as the small sprocket is in the correct position (some frame shapes don't allow large sprockets on the inside) and our torque is transferred more efficiently to the pedal spindle since the force is closer to the mount support.

-improved mounting design. New aluminum mount plates are lighter and stiffer than the previous steel and upgraded bolt pattern on the motor side remove all signs of torque twist. These mounts don't need to clamp to a frame tube- the interface is now a cushioned polyurethane tube and adjustable metal straps to hold the drive in place. The metal straps fit tube diameters from 1.25"-2.5"+ and are bent by hand to fit any tube shape needed.

-rubber motor mounts. Isolating the drive housing from the mounting plates removes all frame resonance and dampens high RPM gear noises. Compared to the previous non-isolated drives, the new design is nearly silent. 

-upgraded chain tensioner. Riding on a sealed ball bearing pivot, the new tensioner encloses the spring and bearing within the Delrin tensioner, protecting them from the elements and ensuring the tensioner pivots no matter how much dirt you pack into it. 

-custom oil seals. Special seals are being molded just for the Ascent to extend the service interval.

-patent-pending oil channels. Inside the unit we've designed a new way to pump our precious grease around the gear faces and carrier pins using only the movement of the cycloid gears and our special tooth geometry. Increased efficiency and longevity should be the result.

-new ESC mounting plate/heatsink. The HV80 is now suspended between the two mounting plates on a custom aluminum heatsink. Access to wiring connectors is very easy and the setup is very clean. The ESC will be joined to the heatsink via thermal compound, increasing the heat transfer capability of the HV80 immensely. 

Production versions will have the ESC inverted and bonded to the custom heat sink using thermal compound.