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

Yes it from Qiroll. I don't have permission to reveal it yet but definitely i saw it and will do a test once it arrive at my door step. They didn't have name yet for their new unit, its still a prototype. It claimed to be able to conquer steep hill with power wattage over EU regulation. If they allow me to post picture and test details then i will share it given permission but for now i'll keep it a secret while doing intense test ride. Everything looks the same except it has slightly bigger roller but i can't see what friction tape it use. So i'll be detaching the PRO and install the "power monster" soon. Looking at overall spec from my email it seem very promising.
Hopefully it have a new function that detach itself from the wheel or switch to power off.
 
Hopefully it have a new function that detach itself from the wheel or switch to power off.
Can't say much but hopeful, guess i'll have to wait until it arrive.
 
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Looking forward to your report.

Prototype QIROLL 400W+arrived!
Good news! I received the prototype/test unit QIROLL 400W+ today. Happy to say the overall size of the unit "almost" the same as PRO slightly few grams heavier. The motor/roller diameter is 0.5cm larger than PRO version. The USB and power connection power, cable, remote and accessories remain the same + quick release adapter. It can be use on H70 battery pack but i don't know if it can be use other rated battery pack. However it still using that same stock rubber friction tape, i'll be using back my DIY 3M grip floor tape as usual.

I can't post the picture of the unit yet unless QIROLL representative or Jason gave me permission to post it here. Will be doing installation this weekend and do some real test on hills climbing soon during my daily commute. Looks very promising.
 
QIROLL 400W+ preview (test unit).
Ok got green light from QIROLL Mr. Jason to share you this 400W+ unit in this forum. So far they have not assigned any naming type to this unit like PRO, MUTE or FLEX hopefully it will have a name soon once they announce a final production unit. Attached are the photos i taken this morning.
*Note: Its not a final production unit, but there going to produce it soon.

Photos:
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400W+: Try to install but....

So i did test the 400W+ QIROLL yesterday but i find there some issues.
  1. Too long/protruded to fit on standard bicycle such on road bike, gravel bike or other commuter bike with short chain stay. The clutch already extended to max angle. You can see from the picture attached the unit has very long protruded reach unable to fit on rear chain stay neither able to adjust the clutch angle latch to tire, it doesn't even fit behind rear brake caliper at upper triangle frame. The clutch rotation angle movement already max up not allowing it to clear the tire area unlike other models like PRO, MUTE and others. I tried to use additional provided mounting to get more clearance but it does works because it already hit the bulging part of bottom bracket. I can see this one build for older bicycle frame with longer/larger triangle and 100% more likely able fit folding bike or frames with smaller wheels.
  2. Regen braking not working, i press the circle button on the remote and it won't stop. (I'll post video on twitter soon). You'll have to use brake lever as usual to stop the bike ....else maybe i got a dud since its a test unit.
  3. 30 second test run without any load (no tire contact) on my hand it get extremely hot to touch. Was worry how much power it consumed. Took a FLIR temp photo on it.
  4. Stock/default friction tape still got ejected violently when i test throttle run it on my hand. DIY 3M floor tape still the best choice to date.
The Problem: The problem of this unit is not the size of the roller which only have minuscule 0.5mm differences in diameter, but its the angle of the clutch not giving enough degree of clutch rotation to clear the space to sit on the tire. I think Qiroll push the clutch angle higher a bit give it more up extra degree of rotation adjustment.

Conclusion: I don't think this unit able to fit on any performance bicycle since modern one have shorter chainstay clearance between rear tires and bottom bracket. However this type of bikes are the one benefits more with 400W+ power if we could get it fit. Hope Qiroll make special adapter mounting for it.

Possible use for it: As for me i think i'll just have to get a folding bike and fit this 400W+ unit just to have fun. But i won't be bike commuting to work on small wheels daily, maybe grocery shopping going up the hill side which helps a lot with having 400W+motor with climbing power. I'll let you guys know once i done shopping for another tiny bike with long chain stay.

The Good news: I love their "Quick Release Rack" they included in the kit. Makes mounting the motor easy since the screw mount to secure the unit is screw from below the frame (when the bike flipped upside down) rather then tooling the allen/hex key between the narrow gap behind frame seat tube, chainstay and tire. Nice!
 

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Dear Qiroll, 400W+ unit need more clearance angle fit the tire. Modern performance bicycle and racing frame all have short rear frame triangle.

angle_problem.jpg
 
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