Can I use my own crankset?

[MLB]

I"ve read several reports of people using alternative crank arms. They didn't elaborate on what was involved.

I've also read some reports of the stock Bafang crank arms being very soft and bending with little effort off road!

 

[MLB]

"I found some shorter 165mm tandem cranks in polished alloy which also look a bit nicer than the standard 8fun cranks.To monitor battery condition and motor performance etc I opted for a Speedict Mercury it works with my smartphone via blue tooth connection.Th"

http://electricbikereview.com/community/threads/my-surly-troll-half-fat-e-bike.993/

 

[LouisQ]

Where did you find the offset crankarm for the chainring side?

 

[LouisQ]

Well after some research I find some those broken crankarm reports are very limited and confined to extreme abuse/use. I slo found standard offset crank arms fairly easy to find. Much adieu about nothing I think. That being said this old guy on a flat foot is unlikely to break one.

 

[MLB]

Well after some research I find some those broken crankarm reports are very limited and confined to extreme abuse/use. I slo found standard offset crank arms fairly easy to find. Much adieu about nothing I think. That being said this old guy on a flat foot is unlikely to break one.

Depends on what you are doing! The reports I read where of the crank arms bending/distorting on the first or second "mild" jump taken.
Hardly extreme use!

 

[LouisQ]

Would you buy a Prius and take it to a stock car race?

 

[MLB]

No I wouldn't. And if that analogy made any sense I'd see what you meant.

It's the torquey'est solution out there. And you keep your gears.
Going to be popular with off roaders.
IF they can stay together.

Chinese metallurgy (typically) just plain sucks, there are plenty of Youtube videos showing backyard smelters melting down all manners of mixed metals to supply factories there.

 

[LouisQ]

The kit is not nor has ever been represented as a good choice for a jumper. There are motors, drives, and cranks that can take the abuse. Some simple searches would have revealed that. Look I'm not being, or meaning to be rude, but the kit just isn't built for the kind of use you're complaining it won't take. I knew that before I bought it. As to Chinese metallurgy that's a pretty broad statement. It's all a matter of the standards set by the company contracting services. I learned during my scooter years there are great reliable tough scooters that stand up to hard use. And there are shady seedy pieces of crap. It's up to the buyer to exercise due diligence. But your report of failed crank arms is greatly exaggerated. For every failure there are hundreds of successes. Buyers seldom post on the internets to report how great their units run. I've dealt with dozens of users and read nearly every thread and poste on ES and every other English speaking forum on the internet regarding the BBS0x. You are exaggerating the problem. It's just that simple. If you want a unit that will take the kind of ABUSE that jumping will dish out, I can make a recommendation. However you will find, on this particular forum there aren't a lot of users who give a hoot how the BBS0x will perform in a jump.

 

[Ann M.]

We saw more failures of pedals which customers often mislabeled as a 'crank arm' failure. It can also be an oversight of the shop or owner about checking tightness of crank arm bolts periodically. I agree with @LouisQ about Chinese steel manufacturing plants. A good many of those are newer, better quality production of steel than plants here in the US.

 

[LouisQ]

We saw more failures of pedals which customers often mislabeled as a 'crank arm' failure. It can also be an oversight of the shop or owner about checking tightness of crank arm bolts periodically. I agree with @LouisQ about Chinese steel manufacturing plants. A good many of those are newer, better quality production of steel than plants here in the US.

Good point Ann. There have been reports of problems with exactly the same back story. Stupid at the cranks from loose bolts and crass threaded pedals by home installs. Any alloy coteries crank can have the same problem. I've noticed many OEM's are using blur loctite. It make for a harder removal but can be a big problem solver. I think new mechanic and beginners might even consider a torque wrench and loctite. I've started using their green as it's a penetrant to be used after the install. But it's best used where the bolt or nut it positioned up so it can flow down. It doesn't flow sideways very well but still provides some grip.

 

[LouisQ]

Good point Ann. There have been reports of problems with exactly the same back story. Stupid Stripping at the cranks from loose bolts and crass cross threaded pedals by home installs. Any alloy coteries cotterless crank can have the same problem. I've noticed many OEM's are using blur blue loctite. It makes for a harder removal but can be a big problem solver. I think new mechanics and beginners might even consider a torque wrench and loctite. I've started using their green as it's a penetrant to be used after the install. But it's best used where the bolt or nut is positioned up so it can flow down. It doesn't flow sideways very well but still provides some grip.

WOW, I have the latest iteration of apple operating systems. Apparently the "spiel chicker" is far more aggressive than previous versions. Instead of missing a letter, which typically accounts for most of my spelling errors, I'm getting completely new words. WOW!! I promise to look before hitting post from now on!

 

[Ann M.]

Yeah, the auto-fill for text messages on my 'smart' phone can mess me up too!

 

[MLB]

The kit is not nor has ever been represented as a good choice for a jumper. There are motors, drives, and cranks that can take the abuse. Some simple searches would have revealed that. Look I'm not being, or meaning to be rude, but the kit just isn't built for the kind of use you're complaining it won't take. I knew that before I bought it. As to Chinese metallurgy that's a pretty broad statement. It's all a matter of the standards set by the company contracting services. I learned during my scooter years there are great reliable tough scooters that stand up to hard use. And there are shady seedy pieces of crap. It's up to the buyer to exercise due diligence. But your report of failed crank arms is greatly exaggerated. For every failure there are hundreds of successes. Buyers seldom post on the internets to report how great their units run. I've dealt with dozens of users and read nearly every thread and poste on ES and every other English speaking forum on the internet regarding the BBS0x. You are exaggerating the problem. It's just that simple. If you want a unit that will take the kind of ABUSE that jumping will dish out, I can make a recommendation. However you will find, on this particular forum there aren't a lot of users who give a hoot how the BBS0x will perform in a jump.

What is a "jumper"??? You act like that means going off a ramp for a distance record.
No, it is people riding trails (like 100's of these are being used for) and taking normal jumps (part of the fun of biking) that come up.
Hardly the same thing.
I haven't exaggerated anything, simply said what I've read.
You on the other hand, seem to have a vested interest here, and are decidedly defenesive.
LOL