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

Latest updates on my order;
Jason from Qiroll gonna include additional S-2 button and cables. Looks like i'll have both S-1 and S-2 to play around on Qiroll QR-E PRO. Nice!
However my 2nd ebike build going to be late, some parts like custom cranks and special bottle cage to compliment the build almost arrive.
 
That's some daring lane splitting commuting. Where I live I'm pretty sure people would be shouting expletives at you, or worse.
Hopefully Kinhsang will post his experience if/how his tire tread pattern works with the Qiroll. At some point I might use mine on a bike with similar looking Schwalbe Billy Bonkers but I don't see it could work with the standard friction layer. The sanding belt has been great for me so far.
 
That's some daring lane splitting commuting. Where I live I'm pretty sure people would be shouting expletives at you, or worse.
Hopefully Kinhsang will post his experience if/how his tire tread pattern works with the Qiroll. At some point I might use mine on a bike with similar looking Schwalbe Billy Bonkers but I don't see it could work with the standard friction layer. The sanding belt has been great for me so far.


The locals get used seeing me on the road daily for years so its normal to share the road and slip through.
Yes, can't wait to see Kinhsang review on how it roll on knobby semi slick mtb tires but can be a struggle if the tires are made from hard rubber compound. Schwalbe mostly made to be grippy and sticky even on semi knobs.
 
I wonder if it makes motorists, watching you zip by as they are stuck in slow traffic, want to consider bike commuting. Your Qiroll Pro looks like it's made for commuting, lightweight and obviously durable given your extensive experience. Probably the main reason I chose the Mute version was the 24v battery which allows other non-proprietary options like those for 24v power tools, or using a step down regulator like I've tried. Pro model 33v battery would be harder to match. Still, looking back I would have chosen to buy the used Pro that had been listed on Ebay at the time.
I'm confused, since Qiroll supplied you with both S1 and S2 switches does that mean that your new Pro now has USB micro connectors? The Qiroll shop doesn't specify on the product page but they only sell one version replacement switch and don't specify which model it is compatible with - makes me think they use the same connection (USB micro?) on all of their motors now?
 
I wonder if it makes motorists, watching you zip by as they are stuck in slow traffic, want to consider bike commuting. Your Qiroll Pro looks like it's made for commuting, lightweight and obviously durable given your extensive experience. Probably the main reason I chose the Mute version was the 24v battery which allows other non-proprietary options like those for 24v power tools, or using a step down regulator like I've tried. Pro model 33v battery would be harder to match. Still, looking back I would have chosen to buy the used Pro that had been listed on Ebay at the time.
I'm confused, since Qiroll supplied you with both S1 and S2 switches does that mean that your new Pro now has USB micro connectors? The Qiroll shop doesn't specify on the product page but they only sell one version replacement switch and don't specify which model it is compatible with - makes me think they use the same connection (USB micro?) on all of their motors now?
Go QR-E Pro, you won't regret it. Its a whole new experience making commuting more sensible for me.
About S1 and S2, i can't comment much because its a compliment optional package from Jason from backend request rather than front end shop. I'll have to wait for the parcel to arrived to see how S2 switch works on Pro. However i haven't received any news about parcel tracking number since last week order. I felt their delivery process kinda slow compare to other e-bike vendor on aliexpress. Suppose to get their responses by today on my email. All my conversion parts for my bike such as crankset, cable management tools/accessories, bar tape and etc already arrived early ready for QR-E Pro installation. I hate to wait to be honest.

....hmmm. I got scammed?
 
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Already dismantled the 750w mid drive, awaiting for QR-E Pro. Man its been days of waiting with no answer from Jason from Qiroll.
 
That's some daring lane splitting commuting. Where I live I'm pretty sure people would be shouting expletives at you, or worse.
Hopefully Kinhsang will post his experience if/how his tire tread pattern works with the Qiroll. At some point I might use mine on a bike with similar looking Schwalbe Billy Bonkers but I don't see it could work with the standard friction layer. The sanding belt has been great for me so far.
Hi.
Thank you for mentioning me. I used a self-retaining spring hinge to force the Qiroll motor into the wheel. I use abric tape as friction roller tap. It is ok.
 

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Hi.
Thank you for mentioning me. I used a self-retaining spring hinge to force the Qiroll motor into the wheel. I use abric tape as friction roller tap. It is ok.
I'm not smart enough to figure out exactly what you did to make the spring compress the Qiroll against the tire. It looks like the spring hinge pushes the plastic conduit pipe against the roller thereby pushing the roller against the tire (and requiring the roller fixing screws be loosened to allow the roller to contact the tire)? If that is correct how does the plastic conduit stay in place and also rotate with the roller? Forgive me if I'm way off base but it looks like the Qiroll body is fixed to the bracket and the chainstays so the roller is the only thing that can be acted upon by the spring?

Is that a Tongsheng TSDZ2 mid drive installed on the white bike in the background of your picture?
 
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Hi.
Thank you for mentioning me. I used a self-retaining spring hinge to force the Qiroll motor into the wheel. I use abric tape as friction roller tap. It is ok.
Hello:

Do I understand you use fabric tape instead of the friction roller tape that Qiroll sells? For me, the friction tape has always been the weak point of this system as it can degrade and come off after awhile and depending on how much your ride and over what kind of terrain, you may end up having to replace the tape every month or maybe even sooner.

I was always wondering about what a more suitable and maybe even stronger longer lasting replacement for the friction tape supplied by Qiroll would be. Can you tell me what Brand/model of fabric tape you use?
IMG_4674.JPG

Above is a pic of the old style Qiroll friction tape. As you can see the ends of the tape are cut straight across. This tended to eventuall peel off very quickly. Qiroll then changed the design to an angular/diagonal cut which seems to stay on the roller a bit longer. The old straight cut friction tape lasted me anywhere from 100-200 miles, the newer diagonal end cut tape lasts me up to 300+ miles.

Nevertheless, If you've found a suitable replacement for this tape, I'd love to see pics of how you cut it and what it looks like attached to your qiroll roller motor. And let us know how long (how many miles) your tape lasts and does it wear down your tire, provide sufficient grab against the tire.

Thanks again!
 
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