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Preferably 24V 201 rpm, but will consider anything. Also - broken, remnants of, not working Q85 - let me know what have you?

These couple of days discussion cleared a lot of things in my mind and helped me a lot (even though some were determined to lead me astray :)) I have decided to go with Q85 24V 201 rpm and adapt/convert it to my needs. I know what I want to do, just need to get my hands on one of these cuties...

No. I guess dual speed one would be a lot better than what we have (but nowhere near as good as my 24 speed :p ... if I manage to get it sorted out) No, I haven't seen this one. Very interesting, and as you say might be just the job. It looks to me like hub motor converted to inrunner with an...

Yes, I know of such things and yes I know there are simpler ways than what I am doing :D I have e-bike with rear hub motor. My wife quite likes it. I tried it ... once :rolleyes:

Given that we know max torque available it should not be too difficult to calculate. Nothing stopping you from adding more or using bigger bolts. There might be a problem if there is not enough metal (difficult to judge just from the photo) in the "lid".

Yes, for someone with limited machining capabilities, using rear hub motor with either screw on freewheel type or cassette is indeed the easiest option. For someone with a lathe and milling machine etc, adding sprocket to the front hub should be a simple matter (providing there is enough meat on...

They seem to have a lot more versions listed as well. For example Q85 is (supposedly) available with disc brake version, which would make fitting of the sprocket easier (not available on either Q75 or Q85 from BMS). The other question, still on my mind about these motors - is whether they can...

Yes, as far as I know Q75 has 1:13.4 ratio as compared to 1:8 for other motors That, I am assuming in "normal" hub direct drive mode? Should be less of a problem with motor driving the wheel through the full range of gears... Motor is only part of the total weight. I am hoping that using...

not quite :) The only things fixed in my mind are: 1 - desire to have full range of gears for both myself and the motor 2 - as lightweight power assist as possible (for 90% of the time when I do not need to use it, it is dead weight) 3 - as minimal power/torque as possible, to minimise the loads...

Sorry to hear about quality :( I wonder if Bafang has similar small motor? Q75 weighs 1.2kg BTW - I am familiar with the test you are linking. Very useful indeed!

All these mid-drive kits are designed for DF upright bikes: mid-drive kits and are limited to using only rear derailleur. A lot better than having no gears at all (hub motor driving wheels directly) but not as good as in my design that can use both rear and front derailleurs giving me the full...

Yes, noise is the factor, but Q75 is reported as very quiet, no doubt helped by gearbox design:

I've been too many times to China to trust anything on alibaba :D (or any info on Chinese supplier's webpage). Most other (reputable) sources quote the weight of both Bafang and Cyclone motors around 3kg Maybe you got something new I am not familiar with... but unless somebody I trust confirms...

OK, just notice adverts bar to the right :) to start with first few: Whoosh - uses Bafang 8-Fun motors Eclipsebikes - has either Bafang-8 or Cyclone kits Both of these are at least twice as heavy as the one I suggest in my first post (Q75 or slightly heavier Q85). There is an interesting...

acronyms, abbreviations, foreign lingo... o_O not sure :) that wouldn't make sense in my drive arrangement that's what I am doing i.e. connecting mid-drive to the rear/intermediate bottom bracket you are entitled to an opinion :) specsavers time :D Yes, the design is deliberate. See...

Yes ;) Yes, it is mid-drive and it uses hub motor driving the crankset, but because it is DF it only has one bottom bracket with all the complications it causes. In my bike I have intermediate bottom bracket, which makes everything much simpler.

:D I smell another misunderstanding "...front hub is more stealthy and just as powerful..." I am not proposing to fit hub motor to either front or rear wheel. Hub motor (with added sprocket) will drive one of the freewheels on LH side of intermediate bottom bracket. Second freewheel will be...

Sprag Clutch is a free-wheel device... There are two freewheels on the LH side of the bottom bracket.

I am building LWB recumbent and would like to add power assist. So far I got the frame: It has LH front single chainwheel crankset driving intermediate bottom bracket with two freewheels (one for the mid-drive motor): RH side of intermediate bottom bracket has the usual arrangement of 3 speed...