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Search: Posts Made By: turbo1889
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Forum: Electric Bikes
12-10-13, 02:53 PM
Replies: 10
Views: 1,312
Posted By turbo1889

If you gear the motor to a freewheeling crank...

If you gear the motor to a freewheeling crank instead of the rear wheel and you have a multi-gear rear end you will then have a full on mid-drive not just a hill climber helper build. Brushed motors...
Forum: Electric Bikes
12-10-13, 02:21 AM
Replies: 10
Views: 1,312
Posted By turbo1889

At least those are the ways I know of to do it...

At least those are the ways I know of to do it via a roller drive chain (I'm not even counting those cheap nasty sprockets that just bolt to the spokes where they cross on the left side found in the...
Forum: Electric Bikes
12-10-13, 02:09 AM
Replies: 10
Views: 1,312
Posted By turbo1889

I know you said you answered your own question...

I know you said you answered your own question but long story short there are four basic ways I know of to hook a "hill climber helper ONLY" motor into a bikes rear wheel:


----- Left side disk...
Forum: Electric Bikes
12-08-13, 02:45 PM
Replies: 10
Views: 1,312
Posted By turbo1889

You multiply the reductions of the two stages,...

You multiply the reductions of the two stages, you do not add them.

If you gear so that the motor is running at its full rated 2,600 RPM when the rear wheel is going 10-mph then your strongest...
Forum: Electric Bikes
12-08-13, 02:33 PM
Replies: 10
Views: 1,312
Posted By turbo1889

Yes, you multiply the two reduction ratios of...

Yes, you multiply the two reduction ratios of your two stages to get the total reduction and then divide the motor RPMs by that total reduction to get the wheel RPMs which with a known wheel size...
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