The Z Torque Bike Crank-Breaking Laws Of Physics

[Charlie-III]

Originally Posted by Duuuuuuuude

I am more curious about what university would actually take the time to double check the engineering on something.

Ummmm.....maybe the MaxAmps University?? They looked and stated, "Sure, you'll rope in enough money to be close to retirement......go for it! All it's takes is great marketing!"

[HARDKNOCKZ]

Originally Posted by gregrocks90046

These garbage cranks are just like skateboards from the 80's that had weird shapes and cut outs. They called them 'money bumps' and 'money shapes'. It's just for morons that want to buy something that looks different, no matter how poorly they perform. And the square taper bottom bracket has gone the way of the dinosaur. So even if the cranks were normal, they are still fuct!

Difference is...you didn't pay anything extra for the new shapes like the Hosoi Hammerhead. Decks were all around $40 regardless of how dumb the shape.

Now Powell Peralta Bonite was the best skateboard gimmick of all time. Black construction paper made it stronger? Broke my Cab 2nd day out. 1st day it was so "soft" I added about 10" to my ollies. THAT part was cool for a minute or 2.

[gregrocks90046]

Originally Posted by HARDKNOCKZ

Difference is...you didn't pay anything extra for the new shapes like the Hosoi Hammerhead. Decks were all around $40 regardless of how dumb the shape.

Now Powell Peralta Bonite was the best skateboard gimmick of all time. Black construction paper made it stronger? Broke my Cab 2nd day out. 1st day it was so "soft" I added about 10" to my ollies. THAT part was cool for a minute or 2.

Right, you didn't pay more money, but they sold a hell of a lot more!

Do you remember the Santa Cruz foam core boards? Foam core in a fiber glass shell.

[JasonInAugusta]

[SMR 510RR]

Originally Posted by Duuuuuuuude

that's the mold they're using to make their highly dangerous carbon versions...

Yea, they are going to bolt the carbon directly to the BB and the pedals directly to the carbon...WTF?

Seriously though, him trying to break it with his hands proves how strong it is and that was only the proof of concept fiberglass crank! I love how my arms are way stronger than my legs/body weight, that is why I walk on my hands like most other do.

That site has some cool stuff on it though, you have to sift through this kind of garbage and about 1,000 Ipod docks/speakers/alarm clocks (guess no one told them the iphone 5 was going to have a different plug) but other than that there is some cool stuff.

[Duuuuuuuude]

Originally Posted by SMR 510RR

Yea, they are going to bolt the carbon directly to the BB and the pedals directly to the carbon...WTF?

Best case scenario there...they strip out and slip. Worst case scenario...somebody is cranking on them hard, it snaps, and they get a carbon fiber Z crank embedded in their leg.

If he would come right out and say they are for display purposes only, that would be a different matter. The way things are listed though...he clearly has no idea how to do much of anything other than make molds and bad publicity videos.

[JasonInAugusta]

This link is appropriate.

Weird Bike Stuff

Don't miss page two.
http://www.sonic.net/~ckelly/Seekay/...ike_stuff2.htm

[bob1961]

Originally Posted by SMR 510RR

L,W,Y,Z,N,M doesnt matter, only the point where you apply the pressure and the point where it is attached on the other end matter when looking at how the force is applied.

thank you .......bob

....

[rock hard]

I dont get it, in the video right off the bat it ( very quickly ) shows that this crank increases the radious. But a 160mm crank length is just that, 160mm.

you can just get a longer straight crank, and use less material to do it.

Now the square tapper bottom bracket is typical in the racing world of bmx, and thats who its geared towards, so its understandable.

But more torque is best achived with crank length, and gear ratio.
both very much at play in all aspects of bmx.

I call BULL SHIT

[gregrocks90046]

Originally Posted by rock hard

Now the square tapper bottom bracket is typical in the racing world of bmx, and thats who its geared towards, so its understandable.

I respectfully disagree. Just look at Shimano, Profile, Redline and tons of others, they all use a splined bottom bracket for BMX racing. With the very small exception of ultra light BMX cranks for small kids.

[HARDKNOCKZ]

Originally Posted by gregrocks90046

Right, you didn't pay more money, but they sold a hell of a lot more!

Do you remember the Santa Cruz foam core boards? Foam core in a fiber glass shell.

Yes they did. Suddenly EVERYONE had a funky shape. The Dogtown decks got bananas. Scott Oster & Aaron Murrays were pretty funky.

I think I still have an SC Foam Deck at my moms pad...probably around the pile of SMA Fast Eddie decks I collected in the day.

[JasonInAugusta]

Originally Posted by rock hard

I dont get it, in the video right off the bat it ( very quickly ) shows that this crank increases the radious.

No.

What they tried to show was in increased area for increased downward pressure. That's the reasoning behind the green arcs. They just fudged the arc on the right for their crank.

The reality is like many have said. 160mm effective length is what's important. Eye to eye. Doesn't matter if it's straight or looks like Kim Kardashian's ass, it will function like a 160mm crank arm.

[jason]

Originally Posted by vltchkr

The true definition of Torque:

" When trying to pee with a boner and your feet slip out from under you"

Haha, yep, Old School Pirate.

[rock hard]

Originally Posted by gregrocks90046

I respectfully disagree. Just look at Shimano, Profile, Redline and tons of others, they all use a splined bottom bracket for BMX racing. With the very small exception of ultra light BMX cranks for small kids.

The do use a splined crank, but the square crank is very pupulare in with europian bottom brackets especially in expert sized bikes and below.

this link shows the square spindle is still very much in use
BMX Racing Bottom Brackets at Danscomp

and here is a shimano
http://www.danscomp.com/products-RAC...tridge_BB.html

[Brandon]

Originally Posted by binaryterror

Do people realize physics of a crank works point to point?

All this did was put a shape into the crank itself. The crank point is still mount to mount which is still a straight line.

I heard in the wraith forum that if you use a bent steering link with a chassis mounted servo you don't need to switch to a 3 link w/panhard bar.

[Charlie-III]

Originally Posted by Brandon

I heard in the wraith forum that if you use a bent steering link with a chassis mounted servo you don't need to switch to a 3 link w/panhard bar.

In the XR-10 forum they've found that if you use a "Z" shaped drag link, you can make a 200inoz servo work as hard as a 400inoz servo!

No more need for external BEC's!!

[Duuuuuuuude]

Originally Posted by rock hard

The do use a splined crank, but the square crank is very pupulare in with europian bottom brackets especially in expert sized bikes and below.

this link shows the square spindle is still very much in use
BMX Racing Bottom Brackets at Danscomp

and here is a shimano
Shimano UN-55 Cartridge BB at Danscomp

Since when did you become an expert on European bmx racing?

[gregrocks90046]

Originally Posted by rock hard

The do use a splined crank, but the square crank is very pupulare in with europian bottom brackets especially in expert sized bikes and below.

this link shows the square spindle is still very much in use
BMX Racing Bottom Brackets at Danscomp

and here is a shimano
Shimano UN-55 Cartridge BB at Danscomp

Right. I can post a bunch of splined bb's from danscomp so what's the point? I know people still use square taper.

[rock hard]

Originally Posted by gregrocks90046

Right. I can post a bunch of splined bb's from danscomp so what's the point? I know people still use square taper.

Your choice of words was my point, you disagreed with me, and I simply disagree with you.

"they all use a splined bottom bracket for BMX racing."

I was saying the square bottom bracket is most popular, and it is, more polulare that splinend for the reason below.

Square is most populare with younger riders, which actually is a larger market than adult bmx racers.

the main reasn its so polulare with young riders ( parents ) is cuz the arms are generally cheaper to purchase, and easier to remove, install , which is good for growing riders.

My son raced bmx, won the redline cup once, and took 2nd at nationals. I droped 300 on a set of proline superfly mini cranks
( profils only youth bmx racing crank ) with a hollow ti spindle...
a hollow ti spindle square, is not only lighter, its cheaper. My son was the ONLY youth rider I ever say sporting a splined BB

[Charlie-III]

Originally Posted by rock hard

Your choice of words was my point, you disagreed with me, and I simply disagree with you.

"they all use a splined bottom bracket for BMX racing."

I was saying the square bottom bracket is most popular, and it is, more popular that splined for the reason below.

Square is most popular with younger riders, which actually is a larger market than adult bmx racers.

the main reason its so popular with young riders ( parents ) is because the arms are generally cheaper to purchase, and easier to remove, install , which is good for growing riders.

My son raced bmx, won the redline cup once, and took 2nd at nationals. I dropped 300 on a set of proline superfly mini cranks
( profiles only youth bmx racing crank ) with a hollow ti spindle...
a hollow ti spindle square, is not only lighter, its cheaper. My son was the ONLY youth rider I ever say sporting a splined BB

While you may make valid points, your spelling & grammar suck....thus I put little weight into them.

Yes, I have PM'd vendors (on this site) the same thing.

Most OS's (phone or PC) have a free spell checker.

PS, even your "location" sucks.

I hate when MY kids read this and say, "It's acceptable, it's on the Internet!"

Raise your butt out of the ooze and be BETTER.