Dima
Member
- Region
- Other
More speed for Ebike
- Thread starter Dima
- Start date
stompandgo
Well-Known Member
- Region
- USA
Both the System 2 and Smart System versions of the Performance Line CX motors are assist-limited to 20mph/32kph. Sprockets won't change this.
Dima
Member
- Region
- Other
if you have Speed box you may ride more than 99 km/h ) i have )
stompandgo
Well-Known Member
- Region
- USA
Ride safe and enjoy.
BlackHand
Well-Known Member
- Region
- USA
- City
- Western WA
That looks like a gen2 chainring, not for a gen4 bike. That would be ridiculously small on a gen4 drive unit- you would have to pedal 120 rpm just to get to 31kph on a gen4 CX in the 11t cog on the back.
On a gen2, that same 120 rpm would get you to about 78kph and 90 rpm gets almost 59kph.
Maybe post a pic of the chainring on your bike so we can see what you have on it now.
On a gen2, that same 120 rpm would get you to about 78kph and 90 rpm gets almost 59kph.
Maybe post a pic of the chainring on your bike so we can see what you have on it now.
Dima
Member
- Region
- Other
Yes , you are right, my mistake! I need a large sprocket for Gen4 , my bad
BlackHand
Well-Known Member
- Region
- USA
- City
- Western WA
Do you have a direct mount chainring or one mounted to a spider? If you use a spider like below then you should be able put on pretty much any 104bcd chainring that fits.
I can't tell you how big a change you can make with a chipped drive unit without throwing an error though. I do know that the Bosch units tolerate small changes easily.
www.ebike24.com
I can't tell you how big a change you can make with a chipped drive unit without throwing an error though. I do know that the Bosch units tolerate small changes easily.
Miranda Spider for BOSCH from 2020 (Gen4) | Boost | 104mm BCD
The Miranda Spider for BOSCH Drive Units of the 4th generation is made of aluminium and is used to mount the chainring on bikes with Boost…
www.ebike24.com
Dima
Member
- Region
- Other
I ride without errors about two years, speed maximum was 75 km /hDo you have a direct mount chainring or one mounted to a spider? If you use a spider like below then you should be able put on pretty much any 104bcd chainring that fits.
I can't tell you how big a change you can make with a chipped drive unit without throwing an error though. I do know that the Bosch units tolerate small changes easily.
Miranda Spider for BOSCH from 2020 (Gen4) | Boost | 104mm BCD
The Miranda Spider for BOSCH Drive Units of the 4th generation is made of aluminium and is used to mount the chainring on bikes with Boost…
PedalUma
Well-Known Member
- Region
- USA
- City
- Petaluma, CA
Also, large chainrings can prevent hitting low gears without dropping the chain. So, maybe don't be to aggressive out the gate. Narrow/wide will help hold the chain.
I would not ride a bicycle that fast. They are not meant to do that, like the imploding sub.
I would not ride a bicycle that fast. They are not meant to do that, like the imploding sub.
Dima
Member
- Region
- Other
Pretty 50 -70 not very quick
PedalUma
Well-Known Member
- Region
- USA
- City
- Petaluma, CA
At 45kph a lot can happen very quickly and there are many factors, even outside a rider's power to influence like a driver's phone. This happened to a cyclist in my town by a high school at 3 pm Wednesday. It was instant death.
Roulette is not for me, personally. The house always eventually wins.
Roulette is not for me, personally. The house always eventually wins.
Dima
Member
- Region
- Other
I Ride very safely, regardless the speed
PedalUma
Well-Known Member
- Region
- USA
- City
- Petaluma, CA
Okay, It is just not my personal cup of tea. I am currently working on a 4Kw electric off-road only duel motor/duel battery electric motorcycle. I like mid-drives, no throttles, at 18Kg with a top end of 45, 28mph. Yesterday I made a throttle mid-drive and assembled an adult e-trike that came as loose parts in a 15cm wide box.
Dima
Member
- Region
- Other
I installed battery kit for double ranges
Dima
Member
- Region
- Other
Can't upload a photo here, it is a masterpiece!
PedalUma
Well-Known Member
- Region
- USA
- City
- Petaluma, CA
Just reduce the file size to under 2mb.
kevinmccune
Well-Known Member
- Region
- USA
Till the gremlins tune your ride,if you wake up it will probably take a while to realize the root cause of your misery,keep chasing the devil,you will get burnt.
PedalUma
Well-Known Member
- Region
- USA
- City
- Petaluma, CA
I recall and a reminded of the youthful enthusiast in Manitoba who invented 'Zip Tie Cruse Control'. He thought it was the greatest. He zip tied his throttle at full open, leaving it there. And he would shut it off by hitting a brake cut-out lever. Then we suddenly never heard from him again. The implication is that he got himself self-weeded from the genepool garden. I am taking the CHP Electric Bike Safety and Certification Class today. Cut-out levers are a known point of failure.
Similar threads
