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My B70 battery weighs 1kg which is commensurate with its capacity. Weights are listed on the Qiroll site, I've found them to be accurate for what I purchased.

Only reviews are the two on Amazon, give it a try and let us know how it goes. One seller on Ebay lists at $214 with free shipping from China.

You can contact Qiroll with questions directly through their site. I had asked a question pre-sale and one post sale and both were answered. I might reconsider a Qiroll Pro if they come up with a "flex" version that I could use with the 36v or 48v batteries that I already have, would depend on...

To be honest it wouldn't be worth the time for either of us. If you are interested in the low power Mute version Qiroll now sells a version that accepts regular 24v or 36v batteries or higher per their web site for $216 including shipping. I've read that private parties can't legally ship...

I did put it back on a bike but not riding that one because the Qiroll just doesn't work for what I want. Maybe your experience would be different than mine. Too bad that there isn't a way to test before buying but that's not possible - otherwise I'd be very interested in seeing what the Pro...

Without having an opportunity to test the Mute vs Pro I was more interested in the 24v Mute, which I later regretted because the Mute doesn't offer sufficient assist for me and where I ride. Qiroll voltage ratings aren't the same as familiar ebike batteries which, for example a 36v nominal...

I don't remember the particulars but I think the Currie had a freewheel mechanism on the motor drive side so it didn't drag. It's been years since we had it. My wife rode it all over hilly routes and I took it on very steep rides where it performed admirably even though it was heavy due to the...

Years ago I got my wife the first ebike that I bought which was a Currie Trailz and had that type drive unit with 24v lead acid batteries (heavy). Wife only rode it for about a year until she got her strength up and went back to a non-assist bike so I sold it (now she's back to needing a...

No idea, you'll have to do a review when you get one :). Nice that it doesn't have some unique 33v requirement like the Qiroll Pro, that was the main reason that I didn't buy the used Pro when I had the chance.

I don't have battery recommendations. Got a few off of Amazon that were widely panned on this web site but they have been great for me, as old as 5 yrs without any issues. No guarantees about quality of Qiroll battery either though. I'm careful with charging and storage but I'm careful with...

Unfortunately a hub motor forces you to choose between your small wheel and large wheel bikes. I've read a lot on this site about hub motors overheating and failing but never experienced that myself with the two hub motors that I have. Again this has been on very hilly rides - my neighborhood...

Just my opinions and only based on my Mute Plus version YMMV as the Pro has more power: Given the elevation profile that you posted the Qiroll might not be the best choice. Depending, of course, on how much assist you are looking for. I live in a very hilly area and the Qiroll isn't helpful...

The Trigger pro works well for me, about 25 miles 50:50 mixed asphalt and smooth gravel. Holding pressure steady at 60psi for about a week as is the G-one tubeless with gorilla tape and orange seal. I like it and it was inexpensive

Finally got around to cleaning out the Flat Out, re-taped the tubeless rim and everything went smoothly and no leaks even though the Billy Bonkers aren't tubeless rated.

Nice, wife was there a couple weeks ago visiting her sisters (thought of by me as Selma and Patty) and friends in Michigan.

Tongsheng TSDZ2 is a reasonably powerful torque sensing mid drive. Probably similar performance as the TREK 50nm that I think I read that you have. Similar to my Yamaha 70nm mid drive anyway. Depends on which power version you get. Not sure about the Sturmey Archer 3 speed but the Nexus 3...

I wouldn't be confident with a front hub motor on skinny forks with what looks like forward facing dropouts in this Raleigh 3 speed. It has a three piece bottom bracket which should fit a TSDZ2, I put one on a '70s Sears with similar cranks. Chainguard would have to be removed or mount modified...

The couple tools to remove either one or three piece crank assemblies are inexpensive and the procedure is simple and easy for a person with a modicum of mechanical ability. Wear nitrite gloves and have a rag on hand for the small amount of grease that you encounter. There are eccentric bottom...

Did you just get a new Trek 50nm mid drive and are you satisfied with performance? If so you might like a mid drive Tongsheng TSDZ2 conversion. I've have two, a 48v 750w version and a 36v 500w and moved them around on several bikes including a shimano nexus 3 speed equipped bike. Smooth...

Just relaying my experience, yours might be different. On my gravel bike I installed a tubeless 40mm Schwalbe G-one allround performance and a 38mm Specialized Trigger Pro both on 17mm id rims using Gorilla tape for rim tape and Orange Seal sealant. Tires went on easily and sealed perfectly...