REVIEW: QR-E 250W ELECTRIC BOOSTER BICYCLE MOTOR AND B60i AND B70 BATTERY
- Thread starter ebike
- Start date
yoinkers
New Member
- Region
- USA
I forgot to take pics give more details as I was outside
3 km ride with friction tape, half way through i smelled burning or "melting" but thought it was from barbecue from a street parade (it was a coincidence), around 2.5km in i felt that boost was no longer boosting. Upon arriving I checked to see that grip tape was no longer there, with the black paint on the roller being completely worn off. I had applied the friction tape as 1 layer as I wasn't sure how much to apply and side by side.
So Im not sure if its just a bad tape that I got or a bad installation by me
(Also forgive me: I just learned and started my biking journey last month so this is basically my first "mod" to my bike)
Update: The tape no longer shoots out like a bullet, most likely because of the roller originally not being tight enough however im not sure if the roller is overtightened on the tire itself causing unnecessary wear. Is there a good way to check if its tight enough while prevent the tape ejection?
3 km ride with friction tape, half way through i smelled burning or "melting" but thought it was from barbecue from a street parade (it was a coincidence), around 2.5km in i felt that boost was no longer boosting. Upon arriving I checked to see that grip tape was no longer there, with the black paint on the roller being completely worn off. I had applied the friction tape as 1 layer as I wasn't sure how much to apply and side by side.
So Im not sure if its just a bad tape that I got or a bad installation by me
(Also forgive me: I just learned and started my biking journey last month so this is basically my first "mod" to my bike)
Update: The tape no longer shoots out like a bullet, most likely because of the roller originally not being tight enough however im not sure if the roller is overtightened on the tire itself causing unnecessary wear. Is there a good way to check if its tight enough while prevent the tape ejection?
Last edited:
3dxl
Active Member
- Region
- Asia
Are you using Qiroll grip tape? Ditch it. Because even if you clutch it right it does not provide full 1:1 ratio power. Somewhere along the ride i can feel it wasted/leaked out 30% of the roller through slippage.
yoinkers
New Member
- Region
- USA
No, im using the 3m safety walk kind, however when my location it wouldnt arrive fast enough so I bought a cheaper one, but its kept rejecting till yesterday, however i feel like I have the roller pushed down too hard as the screw clutch is almost too tight to turn anymore (about 90% tightened) if that makes sense
3dxl
Active Member
- Region
- Asia
I think roller too tight. Here quick tip how to get it right depends (on type of riding you want: full boost or pedal).
If want full boost while pedaling + non slip in the rain (my way) here's my setup:
1. Tighten the clutch, then turn ON the battery. Wait until the LED light turn "RED" behind the Qiroll roller unit.
2. Lift up the wheel and use your hand to spin the back wheel. Observer if the wheel can gradually rotate from slow to fast once the Qiroll start activated.
> If it too slow to pickup then speed loosen up the clutch a bit. Tight clutch will cause the roller to overheat and melt the friction tape glue then causes it to detached from roller.
> If it accelerate too fast from the start then it means the clutch is too loose and will wear off the friction tape and will slipped in the wet. Tighten it a bit.
3. Adjust it until you find the sweet spot.
Try it.
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