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Hopefully no one actually uses your calcs for there own wheels, as each rim ERD needs to be double checked and measured as none are the same unless the rims are from the same batch and maker.

The issue is finding a good wheel builder who will do a motor wheel. I have had great success building my own, the first couple I used to get the odd broken spoke. Since those first forays into wheel building I see no broken ones more so since using a tensionometer and Sapim strongs.

The wheel needs rebuilding properly, it is best to use 14g spokes which have more give in them and should not snap so readily. 13g built wheels tend to be very patchy when it comes to breaking spokes. Unless someone can give a definitive answer remove a good spoke and measure it properly from...

The bike will be using speed control, the power will be the same in all power levels. What differs is each power level will have a max set speed, speed is the range killer with these type of speed control systems.

The bikes original top speed is 25mph/40km/h, which means the motor winding/rpm speed is at least 400rpm as it is in a 20" wheel. If the same rpm hub is used in the so called 250w hub (which I expect is rubbish and is still 500w), the hub will be running at a non optimal speed as 17mph is only...

If using max assistance continuous then range will be poor, the only way one gets the claimed makers range is by using low assistance and low speed.

What is the bikes max speed is 25km/h or more ?

An internal sensor although optional is handy to have installed to monitor temps when in use (esp on the winding side), a sub 60c temp can be kept to by selecting gearing or PAS modes. Over heating the windings means loss of power and poss future failure. The plastic drive side cover (frontal...

Cost per mile shouldn't come into it and be compared to a car. The fact one is out riding is often the because of the joy factor and cardiac exercise one is getting out of the experience, more so when the sun is out and a longer ride out becomes more pleasant. On a pleasure ride one sees more...

What is the battery ah or wh ? The fact the bike is 500w else where and is restricted might be a reason why battery range is poor, if the motor is running inefficiently due to less current then it may be wasting power as excess heat ? Not forgetting this is a smaller wheeled bike and they have...

Nothing with the system it self as it is is a Suntour one which have had a few unresolved issues. Some have tried extra straps to stop the battery moving in case of a contact issue and some have tried extra ties for the motor cable joint claiming this is where the issue is at. The reason why the...

The shut down is likely an over sensitive BMS in the battery, it may use extra sensing/comms I believe to the controller/display.

The Erider controller will need their throttle as well. A lot of controllers don't have the alarm mode so won't be of use to you. The KT's certainly don't so you would have to forget about the alarm, no guarantee one would work but probability is it should. It isn't known what type of signal...

It is engine power output inc that which a rider can add. Although the bike is rated 250w most can achieve greater output for longer but at a cost to battery range.

Yes, stolen ones.

It is but has sub forums, there is a dedicated speed pedalec section for posters to use.

Price isn't everything, against a ICE vehicle pollution locally is nil.

One needs a controller that doesn't needs a display so likely rules out generic ebike stuff. One could try a KT controller a 12mosfet 30a model with you 3 wire thumb throttle, if one buys the block connector type and not waterproof type. The Block connector type have a plug in jst which shorts...

Likely it will be 100mm but it is best to be sure before searching.

Aliexpress might be the best option or try Banggood. If you want the dj7061 then I think greenbikekit have them.