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DeWalt Powered Rad Rocky Mountain

Fraser Valley, BC, Canada

354

Published: 2023-12-17

Mountain Bike

FH212/RH212

Fast

Here's my 72V Rocky Mountain Fusion with RH212 hub motor, Frankenrunner controller, and Cycle Analyst. Powered by Dewalt's now discontinued 36V outdoor batteries in a custom, 3D printed, ABS plastic holder.

The 7.5Ah 36V batteries are connected in series (540Wh) and are easily swapped for longer trips. I commute to work (30km round trip) so the pannier bags are used daily. I changed the chainring to a larger size to make it a bit more road oriented. I'm also a huge evangelist for systems thinking.

These batteries power our Grin e-bikes, Grin wheelbarrow, an iSUP, a fishing kayak, an inflator, a 2000W emergency power pack, in addition to all the Dewalt lawn and garden gear.

The batteries just slide in, making swaps and removal easy. The batteries are also a great size for taking along to prevent theft. — Inserting a battery

Tired of all that baggage? The pannier bags unclip in seconds. — Sans pannier bags

72V and 2000W. Off road only of course. ) — What hills?

When Dewalt discontinued their 40V (36V) line of batteries they were discounted to pennies on the dollar. I loaded up! — So many batteries

Thanks Grin for providing diagrams for your components. It makes designing attachments a lot easier. — Frankenrunner mount

Some Build Bits

Here are some bits and bobs from the build. All ABS parts were 3D printed using a Raise 3D Pro Plus printer.

This is the plastic piece that snaps onto the bike carrier and holds the Frankenrunner controller. — Frankenmount - Model

How the controller attaches to the mount, before it is snapped onto the carrier. — Frankenmount side view

This is the ABS battery connector. the stainless steel strips soldered to the wires go into the slots. A strip of ABS (see 3D model) with keyed bumps gets glued to the larger connector, sandwiching the stainless tabs in place. — Battery connector

This is the connector that the Dewalt batteries slide into. I've made dozens of these for all my Dewalt powered projects. — Battery connector - Model