- Joined
- Aug 7, 2020
- Messages
- 56
Hello all,
I currently own a fat bike ebike I got for free as an abandoned package (I work in shipping). Best score ever! It has got me hooked and I've put over 300 miles on it in the just under 3 months I've had it, but now I want more power, and, being a huge nerd, have proceeded to try and learn everything I can about electric vehicle and battery technology, and am ready to embark on my first build/modification.
As the title says, I do know pretty much exactly what I want from the bike I will build, from performance to riding conditions, but the part where you guys hopefully come in is that I'm not entirely sure how to get to that end result. First here's a picture of what I am starting with, and for economical reasons really hope I can use in my build and still achieve my goals.
Made by dj-ebikes it comes stock with the bafang 750w hub motor, a 25A controller, and a 48v 13Ah battery with no information on it's max continuous amperage capability or bms, and I can't get any answer from dj-ebikes on that either. So, I'd probably want a new motor, new controller and lcd display, and a new battery to run it all, but use the rest.
So, here is the performance I'm after, as well as the conditions and terrain I plan to use it in.
- A top speed of 35-40mph
- Decent torque/acceleration (125 N.m.+)???
- Desired range @ 20mph 20-25 miles
- Climb relatively short but steep hills with ease
- Road/Commuter riding (minimum performance needs)
- Trail/Offroad riding for fun (where I'd like it to shine)
- Western Washington weather, mild and plenty of rain
- Budget around $600 (excluding battery)
I know a heavy fat tire bike isn't the most nimble option for serious trail/downhill riding, but with my current budget that "perfect" ebike will have to wait until the next build.
The motors and kits I have been looking at are:
MXUS 4504 3000w (4t) - Haven't found paired with a good "kit"
Leafbike 1500w snow fat bike conversion kit
https://www.leafbike.com/products/b...h-snow-fat-tire-bike-conversion-kit-1081.html
kun ray electric fat bike motor kit 72v 3000w - $450
https://www.aliexpress.com/item/4001116307016.html
Leili 3000w 72v electric fat bike conversion kit - $600-800 (seems to vary widely)
https://www.ebay.com/itm/Leili-3000...-or-Regular-Tire-Conversion-Kit-/123326859463
niubo 5000w/72v ebike kenda fat tire conversion kit - $699
https://www.ebay.com/itm/Niubo-5000...878602?hash=item1cef99318a:g:NI0AAOSwYy9fIlFT
Most of these are a tad out of my budget but if that's what I need to get the bike I want then so be it. But aside from these choices I'm very open to any other suggestions. Maybe even not buy a kit at all, but the individual components? That seems more expensive from my research, but probably better performance.
And then, of course, the battery. This will be a 48v or 52v build, that part is for sure. But what sort of capacity, max continuous discharge, and bms would I need for my goals? For instance will cells rated at 10A max continuous in a 14s4p configuration do the trick? And what about bms? I keep seeing so many pre-assembled batteries sold come with 30A bms, which seems weak, but maybe I'm not understanding something, or maybe the packs are made with low C, low A cells, I don't know. I'd be open to buying a battery but that frame makes me think I might have to build my own due to lack of room in the triangle. The most "powerful" batteries I can find are sporting a 50A continuous bms, but that's probably good enough for my needs?
Hopefully I've covered my needs well enough for some good feedback, but I'll also gladly answer any questions if it will help.
Thanks!
I currently own a fat bike ebike I got for free as an abandoned package (I work in shipping). Best score ever! It has got me hooked and I've put over 300 miles on it in the just under 3 months I've had it, but now I want more power, and, being a huge nerd, have proceeded to try and learn everything I can about electric vehicle and battery technology, and am ready to embark on my first build/modification.
As the title says, I do know pretty much exactly what I want from the bike I will build, from performance to riding conditions, but the part where you guys hopefully come in is that I'm not entirely sure how to get to that end result. First here's a picture of what I am starting with, and for economical reasons really hope I can use in my build and still achieve my goals.
Made by dj-ebikes it comes stock with the bafang 750w hub motor, a 25A controller, and a 48v 13Ah battery with no information on it's max continuous amperage capability or bms, and I can't get any answer from dj-ebikes on that either. So, I'd probably want a new motor, new controller and lcd display, and a new battery to run it all, but use the rest.
So, here is the performance I'm after, as well as the conditions and terrain I plan to use it in.
- A top speed of 35-40mph
- Decent torque/acceleration (125 N.m.+)???
- Desired range @ 20mph 20-25 miles
- Climb relatively short but steep hills with ease
- Road/Commuter riding (minimum performance needs)
- Trail/Offroad riding for fun (where I'd like it to shine)
- Western Washington weather, mild and plenty of rain
- Budget around $600 (excluding battery)
I know a heavy fat tire bike isn't the most nimble option for serious trail/downhill riding, but with my current budget that "perfect" ebike will have to wait until the next build.
The motors and kits I have been looking at are:
MXUS 4504 3000w (4t) - Haven't found paired with a good "kit"
Leafbike 1500w snow fat bike conversion kit
https://www.leafbike.com/products/b...h-snow-fat-tire-bike-conversion-kit-1081.html
kun ray electric fat bike motor kit 72v 3000w - $450
https://www.aliexpress.com/item/4001116307016.html
Leili 3000w 72v electric fat bike conversion kit - $600-800 (seems to vary widely)
https://www.ebay.com/itm/Leili-3000...-or-Regular-Tire-Conversion-Kit-/123326859463
niubo 5000w/72v ebike kenda fat tire conversion kit - $699
https://www.ebay.com/itm/Niubo-5000...878602?hash=item1cef99318a:g:NI0AAOSwYy9fIlFT
Most of these are a tad out of my budget but if that's what I need to get the bike I want then so be it. But aside from these choices I'm very open to any other suggestions. Maybe even not buy a kit at all, but the individual components? That seems more expensive from my research, but probably better performance.
And then, of course, the battery. This will be a 48v or 52v build, that part is for sure. But what sort of capacity, max continuous discharge, and bms would I need for my goals? For instance will cells rated at 10A max continuous in a 14s4p configuration do the trick? And what about bms? I keep seeing so many pre-assembled batteries sold come with 30A bms, which seems weak, but maybe I'm not understanding something, or maybe the packs are made with low C, low A cells, I don't know. I'd be open to buying a battery but that frame makes me think I might have to build my own due to lack of room in the triangle. The most "powerful" batteries I can find are sporting a 50A continuous bms, but that's probably good enough for my needs?
Hopefully I've covered my needs well enough for some good feedback, but I'll also gladly answer any questions if it will help.
Thanks!