REVIEW: QR-E 250W ELECTRIC BOOSTER BICYCLE MOTOR AND B60i AND B70 BATTERY

[3dxl]

The Yamaha is 36v 250w nominal with up to 650w peak (I think). The trail I rode yesterday is mild railroad grade that I rode mostly level 1 or 2 with level 3 (of 4 levels) on a short steeper section because I don't want to stress my knee. I checked the bike display from yesterday's ride which was 44.2 miles with 68% battery capacity remaining in a 500wh battery. It was an out and back ride with probably less than 1000ft of climbing. I'm sure your Bafang is much more powerful but the Yamaha does pretty well. Post up your new Qiroll builds when you do them.

Where i live 250~650w still not enough to leverage my daily commute and that hill stuff i have to deal with, i need more power to match the flow of traffic. However for chill and relaxing scenic ride like yours that is good enough. 44.2miles with 500wh is really good mileage including under 1000ft climbing that power consumption equivalent complete touring mileage where i live around perimeter district. Btw 750w saved me from angry dog chase, lol!..but still i hate my heavy bafang.

 

[3dxl]

Updates: Wow! Received complete new replacement!
Finally i received the replacement unit to replace my old QR-E PRO (V1). They sent me a new V2 unit, a complete kit! Now that's an awesome product support for customer right there Thanks to Qiroll and Mr. Jason for keeping their customer happy even after products have been purchased 2 years ago. My fast white stallion (Merida 901) road bike is back in action.....yes it the fastest steed that killed V1. Hopefully V2 can handle it. Will post video how i install, test and stuff!

Photos:

 

[3dxl]

Yay! My white stallion is back on the road! Zooommmm away!
The PRO (V2) seem to perform well like the V1 on the first day today. Need a week to run-in/break-in the motor before i can see some optimal performance. Still, today was a fun exhilarating ride! Thank Qiroll for the replacement unit.

Video:

x.com

x.com

https://twitter.com/i/web/status/1817909080264241562

 

[EMGX]

Sooner or later someone was bound to try this, so it might as well be me. Seems to work well although on clearly suboptimal tires.

 

[kevinmccune]

Where i live 250~650w still not enough to leverage my daily commute and that hill stuff i have to deal with, i need more power to match the flow of traffic. However for chill and relaxing scenic ride like yours that is good enough. 44.2miles with 500wh is really good mileage including under 1000ft climbing that power consumption equivalent complete touring mileage where i live around perimeter district. Btw 750w saved me from angry dog chase, lol!..but still i hate my heavy bafang.

can of 20 ft hornet spray should deter dogs(or bear spray)

 

[3dxl]

Sooner or later someone was bound to try this, so it might as well be me. Seems to work well although on clearly suboptimal tires.

Front wheel drive provide good off-road traction and stability, surprise you have huge amount of front for clearance to fit rear the fork.

can of 20 ft hornet spray should deter dogs(or bear spray)

I can't comment that, but i won't able to have leverage of time to stop and spray some dogs. Speed is my safe option.

Btw encountering rabid dog, mouth looks foamy:

Video:

x.com

x.com

https://twitter.com/i/web/status/1818623875229638848

 

[3dxl]

QIROLL 320W QR-E PRO SETUP VIDEO.
Just published video how i setup my 320W QIROLL QR-E PRO, test and rides. Enjoy!

Video:

.

 

[kevinmccune]

QIROLL 320W QR-E PRO SETUP VIDEO.
Just published video how i setup my 320W QIROLL QR-E PRO, test and rides. Enjoy!

Video:

.

you did a double setup?like the mags

 

[EMGX]

Excellent videos 3dxl.
Qiroll needs to do a better job of sealing the drive unit from water/dust ingress, you shouldn't have to do that yourself. IMO USB-C jack would be better than their choice of USB micro.
I went for a ~10 mile fairly flat dusty gravel ride with the Qiroll on the front wheel. I didn't notice any difference in performance or handling vs installation on the rear wheel but unsurprisingly it did slip on the Schwalbe Billy Bonkers tire (I didn't buy them for use with Qiroll) in any setting other than auto clutch mode which still gives decent assist on the flats. I love the light weight but for my riding Qiroll isn't a good solution. I might list it for local sale to someone who has a more appropriate purpose for it such as yours. Sadly back to the Yamaha or maybe install my Tongsheng again on a bike even though such heavy bikes take away much of the fun of riding.

 

[3dxl]

you did a double setup?like the mags

Its a single aluminum attachment on the motor from the plate, not magnesium material i think.

Excellent videos 3dxl.
Qiroll needs to do a better job of sealing the drive unit from water/dust ingress, you shouldn't have to do that yourself. IMO USB-C jack would be better than their choice of USB micro.
I went for a ~10 mile fairly flat dusty gravel ride with the Qiroll on the front wheel. I didn't notice any difference in performance or handling vs installation on the rear wheel but unsurprisingly it did slip on the Schwalbe Billy Bonkers tire (I didn't buy them for use with Qiroll) in any setting other than auto clutch mode which still gives decent assist on the flats. I love the light weight but for my riding Qiroll isn't a good solution. I might list it for local sale to someone who has a more appropriate purpose for it such as yours. Sadly back to the Yamaha or maybe install my Tongsheng again on a bike even though such heavy bikes take away much of the fun of riding.

View attachment 180002

View attachment 180003

Then definitely mid drive for you where you live, i think instead of selling off the Qiroll you can try do creative stuff like using it on skateboard or push scooter modification into electric. I'm still looking into folding bike project for Qiroll mods...still browsing second hand bike on local market.

 

[3dxl]

Review article: QIROLL Q-RE PRO - 320W E-bike
Finally published a written review about my experience with QR-E PRO.
For those who wants to read in details can visit my webpage here:

Tech review: QIROLL Q-RE PRO - 320W E-bike Kit - SupermotoXL Designs - Life, Designs, Hobbies

Welcome!. This website showcases several of my 3D design works, creation of 3D printed models, DIY advance aerial technologies, UAV, FPV, drones and R/C models.

www.supermotoxl.com

Enjoy reading.

 

[3dxl]

Enjoying daily chase!

Video:

x.com

x.com

https://twitter.com/i/web/status/1821711837735612904

 

[3dxl]

Extra grip power!
I realized another advantages of friction roller; it helps warm up the tires and allow good grip and traction on the road. Via FLIR thermal imaging i can see the temperature increase around the radial. The same method where i warm up my RC car tyre to prep up for racing around the track. No wonder i felt more confident when doing sharp cornering and banking around the streets at high speed.

Photos:

 

[Somo]

Amazing information and reviews. I use a Batec Manual Front drive handbike, Batec wont sell parts to upgrade to an ebike, any comments if this system could work - it looks like it should? The Pro with the 300Wh battery Is perfect as I am allowed to fly with 300wh battery as a medical device. Looking forward to hearing your thoughts. Thanks

 

[R2D2]

Hello, I'm new to this forum and this is my first message here. I own several folding bikes and two other 20" electric folding bikes. I've been researching a better way to convert some of my folding bikes. I've considered front/rear hub motors, mid-drives, etc. One particular folding bike I wanted to convert was a Birdy MK2 with disc brake. There was not a lot of option for that bike due to the special design front fork and 18" wheel. A mid drive would hinder the fold. Typical hub motor would not fit the front fork. Rear folk is a possibility but hard to find a built hub motor in 18" without custom building one.

I spent the past few days reading all the posts here, tech reviews by 3dxl and others, watching all the Youtube videos. I've decided to give this Qiroll pro a try. I like the idea that I can easily remove it and put it on other bikes without too much troubles. I ordered it two days ago directly from the QiRoll website.

From reading the specs, there seems to be only two levels of assistance, Eco or Sports. If I want to do go somewhere in between the two mode in terms of speed, do I just paddle harder on Eco mode?

Thank you. I'm quite looking forward to try this motor out before the weather gets too cold.

 

[3dxl]

Amazing information and reviews. I use a Batec Manual Front drive handbike, Batec wont sell parts to upgrade to an ebike, any comments if this system could work - it looks like it should? The Pro with the 300Wh battery Is perfect as I am allowed to fly with 300wh battery as a medical device. Looking forward to hearing your thoughts. Thanks

It should work as long the qiroll friction roller have ample space and clamp area to mount behind rubber tires. Mounting on odd frame structure requires some DIY.

 

[3dxl]

Hello, I'm new to this forum and this is my first message here. I own several folding bikes and two other 20" electric folding bikes. I've been researching a better way to convert some of my folding bikes. I've considered front/rear hub motors, mid-drives, etc. One particular folding bike I wanted to convert was a Birdy MK2 with disc brake. There was not a lot of option for that bike due to the special design front fork and 18" wheel. A mid drive would hinder the fold. Typical hub motor would not fit the front fork. Rear folk is a possibility but hard to find a built hub motor in 18" without custom building one.

I spent the past few days reading all the posts here, tech reviews by 3dxl and others, watching all the Youtube videos. I've decided to give this Qiroll pro a try. I like the idea that I can easily remove it and put it on other bikes without too much troubles. I ordered it two days ago directly from the QiRoll website.

From reading the specs, there seems to be only two levels of assistance, Eco or Sports. If I want to do go somewhere in between the two mode in terms of speed, do I just paddle harder on Eco mode?

Thank you. I'm quite looking forward to try this motor out before the weather gets too cold.

It should fit on Birdy MK2 below rear stay behind the tires, i can see lots of ample space to mount there so no problem.

As for assist mode either both ECO and SPORT; if you clutch the friction roller on the rubber tires lightly according to installation manual you can easily pedal without much effort on both mode (unless you wanted to pedal faster than ECO) but it might slip a lot in wet condition. In my case i prefer to clutch the friction roller on rubber tires tight and hard, this causes makes it hard for me to pedal but an advantage when running in wet condition and mostly i prefer to ride full button press for instant scooter mode. You'll get the idea and feel once you get your qiroll. I'm planning to get foldies soon, saving up either Fnhon or Brompton clone.

 

[EMGX]

3dxl is definitely the authority and has way more experience with Qiroll than me so take this with a grain of salt:
For me, using a 60 grit sanding belt worked much better than anti-slip tread tape of which I tried a few brands including Gorilla, 3M safety walk and a no name product sourced from Amazon, as well as the stock friction sticker (which I found to be worthless). I went through several of the anti-slip tapes in very short order while the sanding belt still looks like new and required much less roller pressure on the tire without slipping even in wet conditions.
I don't have the pro (regrets that I didn't buy that version), there are essentially 3 levels of assist. The electronic clutch that is always active above a few mph so it doesn't require a button press - without pedaling on flats it carries me somewhere around 5-6mph I'm guessing. Eco is a few mph faster and of course more on sport. Where the system doesn't work for me is on steep grades where it doesn't seem to help much at all in any setting. Keep in mind that I live on a small (but named) mountain and my 1 mile neighborhood road gains 400 feet with sections in excess of 20% grade. If I lived in a less hilly area and/or had the pro version my opinion might be different but I don't need assist on flatter areas anyway. For a commuter like 3dxl it looks like a great solution to arrive at work without being sweaty or tired while still riding a bike that weighs as little as 30 pounds (or much lighter in the case of his very light bike). I'm looking forward to reading about your impression of the Qiroll Pro.

 

[R2D2]

Thank you 3dxl & EMGX for the information. I'm still waiting for the motor to ship out. I did communicated with Jason and he sent me photos of some suggestion on how to mount to motor on my Birdy folder.

I'll try both 3M grip tape and sand paper. For belt sand paper, what grit is best? What kind of tape do you put underneath it? VHB or just regular double-sided tape? Should I use the rubber tape that came with the motor until it breaks or right out change it to grip tape or sand paper?

Thanks.

 

[EMGX]

Why not try the friction sticker that Qiroll provides and see how it works for you, maybe you'll have a different experience and it's easy to change anyway. I didn't come up with the sanding belt idea, I saw that the Gboost friction drive appears to use it, you can check their web site. It doesn't have adhesive so it has to be glued on the roller and UHU is what they list.

I bought a selection of various grit good quality 1" wide sanding belts and 60 grit is the first one I used. I haven't had a need to change it. I didn't want to glue it directly to the roller so I used some 1" wide 1/16" thick solid adhesive backed neoprene directly on the roller (from Amazon, not the spongy type neoprene) and glued the sanding belt to the neoprene underlayer. The two layers are about as thick as the stock rubber friction sticker. The grit in the sanding belts I have is embedded in a durable resin much more resistant to wear than the anti-slip tapes that I tried. Of course 3dlx has had great success with the anti-slip friction tape so you might want to give that a try first, if the stock friction sticker doesn't work for you. Good luck with your project, I hope the Qiroll Pro works well for you.