I'm back at the FL headquarters for another winter, so that means more ebike projects and Endless-sphere! May as well document this one- my third Mongoose brand build, so a stable of Mongooses, Mongii, Mongeese, take your pick...
Cost me 120 bucks off Craigslist. A kids 8 speed fat bike with nice surprisingly light disc brake alloy wheels that I'll upsize into an adult off road capable unit.
It will get a 20 inch fat bike air fork that'll lift the front end a bit and add suspension. Fortunately, adapter headsets are available to swap a 1-1/8 fork into a 1 inch steerer tube. Rear will stay hardtailed and I'll extend the dropouts about 5 inches to add wheelbase. The fat tire will soak up trail riding, I'm not going to be doing anything extreme, just gravel roads and civilized single track.
I've already cleaned and checked the wheels and repacked and adjusted the hubs. Spent over half an hour with a hair dryer removing all the lousy decals Mongoose plasters on their products.
It will get another nominal 3000w MY1020 motor running at more like 5000w with my 20s battery pack, and will use the generic 24 fet controller pictured that says 55A. Motor will mount on lower chainstays just behind the seatpost with chain drive of course to a sprocket and freewheel. It occurred to me that I could physically mod the controller by cutting the shell a bit shorter. It will now fit inside the front triangle. Also rerouted the battery leads to come out what will be the upper end for a much shorter cable run to plug into battery, which goes on the top tube as per a couple other of my builds.
I do have one question for you more advanced controller guys- should I attempt a shunt mod on this? It's an inexact procedure and a bit tricky in this case with close quarters. I'd really like to bump this to roughly 80A from the rated 55...
Cost me 120 bucks off Craigslist. A kids 8 speed fat bike with nice surprisingly light disc brake alloy wheels that I'll upsize into an adult off road capable unit.
It will get a 20 inch fat bike air fork that'll lift the front end a bit and add suspension. Fortunately, adapter headsets are available to swap a 1-1/8 fork into a 1 inch steerer tube. Rear will stay hardtailed and I'll extend the dropouts about 5 inches to add wheelbase. The fat tire will soak up trail riding, I'm not going to be doing anything extreme, just gravel roads and civilized single track.
I've already cleaned and checked the wheels and repacked and adjusted the hubs. Spent over half an hour with a hair dryer removing all the lousy decals Mongoose plasters on their products.
It will get another nominal 3000w MY1020 motor running at more like 5000w with my 20s battery pack, and will use the generic 24 fet controller pictured that says 55A. Motor will mount on lower chainstays just behind the seatpost with chain drive of course to a sprocket and freewheel. It occurred to me that I could physically mod the controller by cutting the shell a bit shorter. It will now fit inside the front triangle. Also rerouted the battery leads to come out what will be the upper end for a much shorter cable run to plug into battery, which goes on the top tube as per a couple other of my builds.
I do have one question for you more advanced controller guys- should I attempt a shunt mod on this? It's an inexact procedure and a bit tricky in this case with close quarters. I'd really like to bump this to roughly 80A from the rated 55...