I got a crank arrm problem

[RichieFromBoston]

I bent the right side crank arm and now its hitting the frame, my question is can I replace those cheesy FSA eco boost crank arms with high end shimano? ty

 

[fooferdoggie]

it depends on your bottom bracket. you may have to change both.

 

[Luto]

It depends upon the spindle. What motor do you have? What model- generation?

 

[LimboJim]

On your new Bosch CX-equipped Bulls? I don't think Shimano cranks are going to work on that spindle. My old Bulls came with proprietary, asymetric cranks - you may want to check with them.

 

[fooferdoggie]

is it a bosch? here you go. I bought these but have not tried them yet.

https://praxiscycles.com/e-cranks-story/

 

[tomjasz]

Yikes! $280 carbon crank. Why? What’s the advantage?

no criticism intended.

 

[theemartymac]

Yikes! $280 carbon crank. Why? What’s the advantage?

no criticism intended.

Why weight of course. Makes your bike lighter, as well as your wallet. It's a two-for value! ;-)

 

[TNC]

Why weight of course. Makes your bike lighter, as well as your wallet. It's a two-for value! ;-)

I've always been somewhat aware of gram counting on my pedal bikes over the years, but I just don't see how this is as big an issue on many/most of these ebikes. I'm not suggesting filling your ebike's frame tubes with lead, but the percentage weight savings on many of these ebikes is negligible IMO.

 

[tomjasz]

Why weight of course. Makes your bike lighter, as well as your wallet. It's a two-for value! ;-)

I’ve purchased high end items that weren’t really needed but I liked the look. So I paid the toll.

 

[RichieFromBoston]

I just spoke to FSA and they couldnt tell me what I can Crank Arms I could cross reference, because the crank arms on my bike are out of stock until maybe end of may. So Does every bike maker put their own bottom bracket in the bosch motor?? I can figure out why I can simply get a different set of arms to do the job. I mean seriously I cant swap crank arms like on a regular MTB?? I asked the dude 7 times, sent pt numbers, sent pictures and he just would not give me an answer.

 

[RichieFromBoston]

I just ordered the praxis arms, because this 8k bike is going cross country with me, pisses me off crank arm bends to the point of hitting frame because the wind tipped it over. yea....................

 

[Gionnirocket]

I just ordered the praxis arms, because this 8k bike is going cross country with me, pisses me off crank arm bends to the point of hitting frame because the wind tipped it over. yea....................

If it bends that easily... Just bend it back

 

[PedalUma]

Bikes with wide chainstays can have this problem.
Look here for some ideas: https://www.hopetech.com/products/e-bike/cranksets/e-bike-crank/

 

[fooferdoggie]

I just ordered the praxis arms, because this 8k bike is going cross country with me, pisses me off crank arm bends to the point of hitting frame because the wind tipped it over. yea....................

wanna see bent?

 

[tomjasz]

The shop I help sells Lekkie Buzzbars. Good stuff.

 

[tomjasz]

wanna see bent?

WTF? A new problem I've never seen.

 

[Gionnirocket]

wanna see bent?
View attachment 85465

Are you sure that crank didn't come off a Barbie Beach Cruiser

 

[PedalUma]

If you have cowboy legs it could be an advantage.

 

[PedalUma]

Are you sure that crank didn't come off a Barbie Beach Cruiser

At least the brunt was absorbed and not transferred into the bearings.

 

[Gionnirocket]

At least the brunt was absorbed and not transferred into the bearings.

There's always a