Is this what happens when you don't use a torque arm?

[morph999]

lol
[youtube]http://www.youtube.com/watch?v=ZNwmpLPhoHw[/youtube][youtube]<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/ZNwmpLPhoHw&hl=en&fs=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/ZNwmpLPhoHw&hl=en&fs=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>[/youtube]

 

[Knuckles]

lol
[youtube]http://www.youtube.com/watch?v=ZNwmpLPhoHw[/youtube]

[youtube]ZNwmpLPhoHw[/youtube]

 

[morph999]

thanks ....I can't get it to work for some reason

 

[Knuckles]

thanks ....I can't get it to work for some reason

Just use the "buttons" and insert the youtube vid ID ... "(youtube]ZNwmpLPhoHw[/youtube)"
I changed the bracket so you could see the text of the post ...

Try it ... You'll catch on!

cool vid ... Loved It!

 

[Link]

At a lower speed, but, yeah, that's more or less what a front drop failure looks like.

 

[dogman dan]

I've seen that one on slo mo on tv a few times. Actually his entire frame spits in half, somewhere in the midde. But yeah, a nice endo is gonna be what happens. One of the reasons, after I'm a cheapskate, that I'm a 36v guy. I do 60 mph on a scooter designed for it. Hell, my 15 mph endo wrecked me plenty.

 

[MidniteTweeker]

Yeah, something broke in the frame. Kinda the reason I was hinting for you to beware of cheap Chinese steel and inconsistent weld joints. First one off the line could be just fine. Next one off the line could come apart. It's one thing when it happens to a 100 pound kid jumping curbs at 10 mph. Different if it happens to a 230 pound guy hitting a pothole at 30 mph. Might not even break all the way on the first pothole but crack just enough to get the process started.

Kind of a rough rule of thumb: Double the speed by 2X; forces increase by 4X. Hitting the pothole at 30 puts four times the force on the frame as hitting it at 15.

I've seen enough of Chinese steel and (lack of) process control to be pretty wary.

MT

 

[dogman dan]

Very true about chinese QC! Thourough inspection initially, and frequent checks after are mandatory for an ebike, which is NOT designed for the use we are giving it. Steel may give you a chance to spot a defect. Alloy is a lot riskier. I am suprised that I haven't busted a frame, which on my bike is alloy. Lots of force on the seatpost with my battery hanging off it. I haven't found a steel frame with suspension. I might have to weld it to get one. Now you are talking risky, trusting my welding! :lol: