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Bike-specific Questions!

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Cogburn CB4 Fat Tire Conversion


I feel fortunate to have found Johnny Nerd Out while researching for a two wheeled vehicle to use in my river adventures. Some of the two wheelers I've considered are the Yamaha TW200 (Dual Sport Motorcycle); QuietKat Apex; and UBCO 2x2. However after watching Johnny's videos, I think the best option was already in my garage- a Cogburn CB4 Fat Tire bike.


My plans for using the ebike are about the same as I have used the non-ebike version. Some trail riding; exploring sandbar islands; and picking up the mail from our neighborhood mailbox. It would be nice to have the electric assist so I can ride farther with less effort. The years are starting to catch up with me so I am not quite the rider I once was.


The bike has a 100MM Bottom Bracket and the frame geometry will make it hard to maximize the battery size. Attached please find a spec sheet and some pics of the bike. Hopefully, there will be a kit that can work for this bike. I am leaning towards a BaFang system that will have integrated lights, USB charger; brake levers; etc. I will likely switch to hydraulic brakes to get all the functions of a BeFang system.


I have booked a consultation with Johnny for later this month. He seems like a great guy from his videos and I look forward to talking with him. Please let me know if you have any suggestions for how to prepare for the consultation or ideas for this conversion.





103 Views
GoRiver Tom
GoRiver Tom
May 10, 2025

I am writing with an updated on my JohnnyNerdOut conversion now that a few years have past. The bike has held up pretty well overall. I have replaced the chain and the right brake lever was broken which required that I replace the lever; hydraulic cable; and rear caliper. I had to re-wrap the wires and used something called “Tommy Tape” which is a grip tape. I think it worked well to wrap up the extra wire.





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