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

3dxl

New Member
Region
Asia
Thank you to everyone who has posted about the qiroll. My main issue with ebikes is the excessive weight. I have a 41# BH gravel bike with Yamaha PW-SE mid drive, a couple Tongsheng TSDZ2 mid drive kits and a bike with a rear geared hub motor. They all work great but I'm constantly taking the TSDZ2 off of bikes (and putting it on a different bike) because I miss riding a lighter bike without the motor and battery. QIROLL looks like something that I want to try on bikes where the total weight including the kit will still be in the area of 30# but:
Ebay only lists the lower power "mute" version and not the pro
The QIROLL web sight lists both but doesn't recognize my location to estimate shipping.

Q:
Is the pro version very loud (and compared to the mute version for those who have tried both like the OP)?
Has anyone successfully ordered directly from qiroll, if so what was the shipping charge (I'm in the US, pacific NW)?
I want to use it on a 20" folder so torque should be better than on bikes with larger wheels but I need assist really only for hills, of which there are a lot of long steep ones where I ride.

Sorry if I don't reply for a couple days as I will be in remote areas without cell service
Thanks in advance

Hey there EMGX, i can answer that since i got the PRO version and ordered firectly from Qiroll official website.

  1. The motor roll Qiroll Pro do make some electric noise but not so noisy and not noticeable to people around me. Frankly speaking i feel my bike are far more stealthy than normal ebike. Here is my video on my twitter account about me riding my bike on qiroll and no sound can be heard from the motor as i speed down the highway and on pedestrian path:
  2. I've ordered directly from Qiroll website, good customer services. But i think the shipping cost was around $55 to my east asia counterpart for my Pro kit with 2x H70 battery, took 8 days to arrived.
  3. 20" should be perfect enough. However its not perform well in wet condition as it slips a lot. Only on dry condition its really give huge punches of torque. I'm happy with mine since it helps me climb 15% hill gradient everyday. :)
 
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3dxl

New Member
Region
Asia
Updates: Performance report and experiences :)

Hey guys im back! Since i've been riding on QIROLL PRO for several week commuting everyday up and down from home to work place in rough traffic its time to share my summary of experiences.
I must say i'm very impressed with overall performance the PRO version, lots of torque climbing up the hills. Everyday i trigger the boost throttle and put a bit of the leg power gave me a good relaxing speed around 36km/h moderate and tops at 42km/h on flat road. Below are my daily graph of my commuting speed as per attached (lazy bum ride):
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Overall i must say the QIROLL PRO totally worth it for my everyday riding style. However as mentioned before in the previous post i have an issues about the reliability of the friction tape that came with the kit, its get ejected from the roller easily at high speed but the DIY wired lock ring did the fix to locked the friction tape tightly on to the roller for several days. However the friction tape only last about 1x tape per-week before it got worn out down to bare metal roller. Attached are the photos of the friction tape worn out after one week of use. The rubber also looks flaky and ripped. Btw i'm still waiting Mr. Jason from QIROLL to send me replacement for the improved tape.

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Battery charger problem:
Another problem i've encounter its the supplied charger are not so reliable with my house voltage running 240V/50hz electric outlet. After one week of use 1 of the charger failed to charged the H70 battery and 5 days later another one showed up the same problem. I've ended up having to borrow my friends ebike battery charger. I did contacted the Qiroll customer support via Jason and he said he will send over a replacement soon. So will be waiting for a new ones to arrived.
Here's the video of the failed supplied battery charger:

Videos: My riding with Qiroll PRO
Despite some minor problems on the friction tape and battery charger overall i'm really happy with Qiroll PRO kit performance. It totally helped me a lot to make my everyday commute to work more easy, relaxing and fun. No longer have pain and stress climbing hills and riding against head winds. Sleep better at night too since my aging legs felt less strained and have no pain the next day so i could continue riding through heavy traffics. I did a perfect 7 days commute per-week compares to 5 agonizing days 100% on leg power. Me in my 40s not as good when i was in 30s so going lightweight e-biking is my way around. I do really enjoy the effortless speed, i reached 5 minutes faster than driving my car through rush hours. Btw below are links to my videos riding on Qiroll Pro, did have a blast of fun!:

Twitter videos link:
1.jpg

Overall i would buy another QIROLL PRO kit again if i had extra bicycle.
 
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EMGX

Well-Known Member
Thanks for sharing your experience 3dxl. With the roller friction tape issue and uncertain long term durability it doesn't seem worth it to me to take a chance on it given the cost (plus $70-$78 shipping to US). Too bad as it seems like a promising way to add assist without making for an excessively heavy bike like most other options..
 

3dxl

New Member
Region
Asia
Thanks for sharing your experience 3dxl. With the roller friction tape issue and uncertain long term durability it doesn't seem worth it to me to take a chance on it given the cost (plus $70-$78 shipping to US). Too bad as it seems like a promising way to add assist without making for an excessively heavy bike like most other options..


Hehehe! 😁😁 Hold on, there's a trick without relying on the factory friction tape. The ideas happened when i was on my last tape while waiting for replacement. Desperate, i was looking for quick solution ..then i found it!

ALTERNATIVE CHEAP'O $2 FRICTION TAPE = 3M Fabric Tape!
This month i've been experimenting alternative material to replace the default friction tape and at the end of the experiment i finally found the most strongest and reliable friction tape that lasts me 3x longer for my brutal way of riding. Behold the fabric tape!! aka fabric duct tape. I bought this fabric tape from stationary store that have very strong 3M stickies and slap it just one layer on to the Qiroll Pro roller and it handled far better than factory qiroll tape! It hold very well torquing up the hills, doesn't eject when i speeding at 44km/h and grips my tires well for full friction rolling...very rubbery feeling too. Lasts me almost 1 week riding on rough terrains and high speed. Ironically it feels solid and faster than original friction tape, lol!
One big roll of fabric tape costs me just $2 at local store. Perfect!!!! I'll post full photo's later how i slapped on my bike but here's how the tape looks like.

IMG_20220728_132612.jpg
 

3dxl

New Member
Region
Asia
DIY $2 Fabric tape as friction roller tape. Works great!
Works far better than original, grippy, easy to replace, cheap, can handle my 44km/h max speed and rough riding abuse. Suitable for tarmac and urban commute with slick tire. Available in any book store, stationary shop and hardware stores in one big roll for $2. Make sure the backing sticky tape are from 3M.

Photos:
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3dxl

New Member
Region
Asia
Excellent QIROLL customer support! Replacement charger and new Qiroll tape arrived! :)

First of all thanks to the customer support at QIROLL Mr. Jason for handling all my recent problem, just got my replacement 1x H70 battery charger and also improve looking Qiroll friction tape as warranty. The Friction rolling tape seems to have new slanted cutting and maybe stronger stickies. The replacement charger works flawlessly but haven't tried out their new friction tape since my cheap DIY fabric tape still wasn't worn out nor giving any trouble yet after a week of use. Maybe will try 'em out soon.

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jerry1233

New Member
Region
Asia
Hi Guys,



After several tried and tested, I almost finished the manual clutch for QRE-PRO.
There is super more efficent than original screw clutch because I can engage the QRE-PRO to tyre on moving or anymoment.
My bike able to start up by only electric without slipping on flat road.
I can feel front push very clearly on assist, especially on out corner by electric only or assist on slow momentum moving.
However, last problem is friction tape will total loss after 8KM distances traveled. It is too short life.
Really can enjoy the QRE-PRO now!!!!
 

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3dxl

New Member
Region
Asia
Behold!! Most efficient friction tape revealed: floor grip tape
Hey guys, its been a while. I'm reporting back with some improvement on QRE-PRO DIY tape. I've found a holy grail to solve all those slippery tape problem. I've been using an anti-slip grip tape from hardware store and it works marvelously on every condition, dry, wet and even hilly terrains. It doesn't tear off at high speed over 44km/h. Been using it now over a month without sign of wear and tear an rode in rainy days. I give me lots of torque going up hill too.

You can find this at any hardware store for just $2 in big roll. Its a very hard grippy surface looks like rough sand paper designed to stick on the floor surface or staircases for anti-slip purposes when you walk on it. What i did to install was cut, sand the surface to smoothen until the texture matches road tarmac grade then stick on the roller. You'll get max grip on any condition, no more slipping. So far my rubber tire doesn't show any wear or tear for many weeks since the tire the roller itself have the same effect as running on hard tarmac road.

Photos:
IMG_20221102_173918.jpg

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IMG_20221102_173945.jpg
 

jerry1233

New Member
Region
Asia
Thanks for your suggestion!!

but would the floor grip tape too strong on friction then damage the tyre?



Behold!! Most efficient friction tape revealed: floor grip tape
Hey guys, its been a while. I'm reporting back with some improvement on QRE-PRO DIY tape. I've found a holy grail to solve all those slippery tape problem. I've been using an anti-slip grip tape from hardware store and it works marvelously on every condition, dry, wet and even hilly terrains. It doesn't tear off at high speed over 44km/h. Been using it now over a month without sign of wear and tear an rode in rainy days. I give me lots of torque going up hill too.

You can find this at any hardware store for just $2 in big roll. Its a very hard grippy surface looks like rough sand paper designed to stick on the floor surface or staircases for anti-slip purposes when you walk on it. What i did to install was cut, sand the surface to smoothen until the texture matches road tarmac grade then stick on the roller. You'll get max grip on any condition, no more slipping. So far my rubber tire doesn't show any wear or tear for many weeks since the tire the roller itself have the same effect as running on hard tarmac road.

Photos:
View attachment 139265
View attachment 139266

View attachment 139267
 

3dxl

New Member
Region
Asia
Thanks for your suggestion!!

but would the floor grip tape too strong on friction then damage the tyre?

Oh, not at all, my tire not damage nor wear after a month. If the tire already made friction on the road everyday why not just do the same thing with the roller. So the idea hit me and i use the grip tape. All i did just use sand paper to trim (blunt it) the rough texture on the tape to match the road/tarmac texture and that's it. Already ride for a month and my tire still looks normal without any damage. No problem. :)
Now the roller and tire made full torque transfer without slipping. I'm so happy i can ride in the rain too. :)
 

jerry1233

New Member
Region
Asia
The stock friction materials really.....sads....
I tried your mentioned fiber tapes with wired cluctch. Quite good.
Floor slip tape was my consider but afraid tire damage.
I am no doubt now to choose the Floor slip tape instead of stock tape.




Oh, not at all, my tire not damage nor wear after a month. If the tire already made friction on the road everyday why not just do the same thing with the roller. So the idea hit me and i use the grip tape. All i did just use sand paper to trim (blunt it) the rough texture on the tape to match the road/tarmac texture and that's it. Already ride for a month and my tire still looks normal without any damage. No problem. :)
Now the roller and tire made full torque transfer without slipping. I'm so happy i can ride in the rain too. :)
 

3dxl

New Member
Region
Asia
Try it, before stick the grip tape on the roller don't forget to sand paper it to trim the roughness first so that i will not shred the tires. ;)
Mines worked and no longer need any tape placement or maintenance. Perfect! :)
 

jerry1233

New Member
Region
Asia
What number of sand papers to sand the tape you use?


Try it, before stick the grip tape on the roller don't forget to sand paper it to trim the roughness first so that i will not shred the tires. ;)
Mines worked and no longer need any tape placement or maintenance. Perfect! :)
 

jerry1233

New Member
Region
Asia
Perfect thanks.

It is because I am using discontinued tire 18x1.35.
Afraid damage it too fast then have to replace by 18x1.5 ....


I use 150-CW grade but it doesn't matter, just use any sand paper enough to blunt off the grip tape surface.
 

3dxl

New Member
Region
Asia
Perfect thanks.

It is because I am using discontinued tire 18x1.35.
Afraid damage it too fast then have to replace by 18x1.5 ....
If you trim the tape rough surface at right texture it will last or equal to the same friction of tire would roll on the road surface.