jonnyc wrote:Hey, thank you very much for the warm welcome.
1. Location: Edmonton, Alberta, Canada
----- Yes like other say, try out the Grin
2. Budget: I'd like to spend somewhere between $1500 - $2000 but have some flexibility.
----- Totally doable. you just need to keep careful track of what you spend on. Battery will most likely cost you the most if you are getting reliable battery. Do not get Lead Acid battery!
3. Typical Usage: I wish it was tear-assing and general mayhem but its really just going to be transporting me to work, the grocery store, etc.... general commuting, but i would like it to be fun and torquey! especially with the big hills I'm surrounded by.
----- You mentioned grocery shopping. This will mean a rack/trailer. Also you will need to be able to lock it up properly. Just FYI, most DYI ebike will not be easily lockable and can be very conspicuous because of the battery and bag, etc.
----- If you want something torquey, then you will need smaller wheels. 20inch wheel are the best on HS3540 for torque and 30+mph.
4. I'm not very experienced with DIY, I would likely have a bike mechanic help me with the nitty gritty.
----- If this is the case, I recommend you avoid DYI. You will run into problems and if you are not experience, it will mean a lot of headaches. But then again, you will learn a lot. It is really up to you if you are willing to spend the time to learn.
5. Expectations: Utility, low maintenance/tinkering is best once its built.
----- Get Direct Drive motor. If you are going to tackle the hills with the usual 26inch, I recommend HT3525 Motor. Just use 72V battery and you are set for 30+mph on flats. Get Lyen's 12 or 18 FET Controller and you will be set. Otherwise, get the HS3540 on a 20in wheel and you will similar setup. Like other people are saying here, keep the motor moving during the uphill to prevent frying the motor.
6. Environment: it does get quite windy at times and the hill I will be going up and down everyday is quite steep. Unfortuneatly I do not have the exact grade but I can tell you its one of those hills thats a bit scary to go down even in a car. It's quite long also, approximately 1000 feet.
----- See number 5.
Hope this helps, the advice will be much appreciated.
Here is a summary of what I recommend:
1) Go to the Grin if possible
2) Don't do DYI if you are NOT willing to spend hours on learning and tinkering
3) If you do decide to go DYI, then get HS3540 on 20inch wheel or HT3525 on 26inch. Both should be on 72V Lithium battery to get you 30+mph on flats and good torque on startup.
4) Get rear drive kit. Don't go with those front wheel drive bullshit.
5) Get Lipo if you are adventurous. Once you get use to it, it will provide you with reliable power pack. I am using Lipo now for about 4-5 months. You just have to be careful a bit.
6) Otherwise if you are concern about safety, just go with Cellman's A123 LiFePo4. You can go NMC, but those have low C rating so it might be good especially at 72V.
7) Get Full Suspension bike to convert if possible. You will not regret it! Just make sure you have a good torque arm
Best of luck on the build. I have a feeling that you will probably like your 2nd build a lot better.