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I think competition is mid-drive, 28mph, drop-bar road bikes with medium-long distance capabilities. Giant Road-E+, Giant Revel E+, Bulls Grinder Evo, Trek Domane+. Super excited about this category!

Whatever is smoothest, so torque sensor would be better. What kind of controller and sensor would you use for a sub, relatively high torque, 15mph application? Just starter playing around with Justin's motor simulator. Thinking single speed now.

Are you still trying to take it to market?

This is my fear with the BBSD/BBHSD series-too much oomph. Initial thought is to design around a traditional trike style too.

Ok, good to know thanks!

Sub $1.5k all in. Based in flat Florida, so I think a 3 speed would be sufficient and a singlespeed may even be enough. Some things I was wondering is how to handle the power delivery, throttling at low speeds, bike handling and stability at any speed.

Even with just these 'simple' steps, I would conjecture this puts you in the 80th percentile of people who are a) able and b) willing. So, best that the wheel very infrequently requires removal (few tire punctures, high-mileage tires, high-mileage belts, etc.).

Not sure what you are responding too, but this is part of Kindernay's solution with a shell that you can remove the hub from so you can use multiple wheelsets.

Conditions matter a lot too, so if that classic derailleur and chain are gummed up, expect low 90's. So the tradeoff in efficiency between a IGH and chain becomes negligible or even non-existent.

Anyone have experience with a build for someone with Parkinson's? Any particular features useful? My father is doing a build for a male relative. He was thinking of starting with a trike platform and adding a Bafang middrive.

As the title says, who's got one? What do you think of it?

Through Bike Connection, $3,200 seems like a really good deal. I have this bike now and really like it except for the display/motor turning off (working through that issue currently). https://sfbay.craigslist.org/pen/bid/d/palo-alto-2020-giant-revolt-pro/7142277641.html

Makes sense, your drivetrain will last longer tooth with a higher tooth count (not sure if appreciably or not in your case).

90RPM is known as the 'most efficient' cadence for road cycling. Personally, I like low 80's. 80 is probably a medium to high cadence for most, but best thing to do is to measure your own. Does your bike have an instantaneous cadence setting on the display?

Sheldon Brown has all things bikes: Sheldon Brown Gear Calculator I did a quick analysis for you with provided numbers. Note I left the crank arm length stock (it's usually stamped on the inside of the arm), used 2.35" instead of 3" because that's what was available, and assumed 80RPM. You can...

31 - what did i win?!

Hope has some of the trickest and finest finished parts in the industry!

Upside down (I prefer 'inverted' too) lubricate the internals better, generally. The RS-1 by Rockshox was known to have flex and was an expensive fork. I rode it (200lbs), and I could feel the flex over a 'standard' 32mm Fox fork. Also, bikes (except for DH) aren't typically designed with a...

haha love it! build time?

When I commuted to work 21-22 miles with ~900ft. gain, average speed was 19mph-21mph. 28mph potential is useful when you need to better keep up with traffic or make time. As an aside, I think the focus should not be on the speed potential of the device, but what safe speeds look like for a...