Schwinn 26" mountain bike frame. 24" mountain bike wheels.
The front forks were turned around the wrong was as I wanted the brakes behind , not in front of the forks. However it was easy to turn the forks around the right way and turn the brakes around and they actually do work.
The handlebars fit and after hack sawing a 1/2 inch off the bottom of the goose neck the 24" forks fit perfect.
The bike frame seems solid. However there is a major weak link. The 24" forks. The drop outs seem kind of weak and the forks in general NOT strong enough for dual motors , 1,750 watts total and 37.5 mph.
I was going to wait and order better forks but this build is based on parts I already own. Besides what would Mad Max do if that is all he had to escape from Thunderdome. He would not be ordering stronger forks from e bay and waiting around a month or two. :lol:
I have a plan which will use the brackets which install the front motor which will not only also strengthen the steering system to the point of no fail but will also SUPER reinforce the drop outs many times stronger than any torque arms can do and also strengthen the forks besides mounting the motor. Yes folks it does four things. Stronger steering. forks , dropouts and a motor mount.
The pictures on the bottom show a crude description of what I intend to do. It will be similar to the dual motor set up. Heavy duty pressure treated 1 - 1/4 by 1 -1/4 " I think it is. It is really strong stuff and will bolt to the handle bars and two bolts will secure those to the forks on each side.
The other difference from the 20" build is they will also bolt to the 1/4" flat steel bar on the bottom two bolts on each side running thru the pressure treated wood and the forks and a hole will be drilled for the axle to fit thru the bottom. Everything from the top of the BMX handle bars down to the axle will be connected. It would probably be similar to something Mad Max would come up with.
The spoke sprocket took a couple of hours to remove from the 20" wheel and install on the 24" wheel.
The rear end is already strong and the other motor should mount easily back there. 1,000 watts in the back and 800 watts in the front. The front Hub motor on the Schwinn is 1,000 watts so I do not know why anyone would object with a 800 watt chain drive on the front.
I am really hoping that this build will be a safe and semi professional build most members here would ride themselves. It is not a 50 mph suicide bike and would only go 40 mph down a hill or sleight decline.
Top speed will be 37.5 mph on flat pavement respectively and I will hook up rear brakes also before it is finished. Also with future upgrades like four 36 volt packs for the front motor and a 24 Ah 48 Volt custom pack for the rear the range and hill climbing capability will be exceptional.
Thanks.
LC out.