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houseofjob

WARNING! Gotway ACM V2 / Monster PEDAL BREAKAGE Incident

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How is this possible, the footplates are metal but they look plasticy on these pictures..

Scary if this happens at high speed, I'll check them before each ride from now on, thanks !

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2 hours ago, meepmeepmayer said:

Is this the only known incidence of that happening with GW pedals?

Yip! first ...

KS16 pedal from early versions also had some breakage...but thats now fixed

BTW: Was it Gotway or GO-A-WAY? :-)

one of the last qualityproblems that was still missing....don't we have all  faults that are possible now?

:-)

Edited by KingSong69

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More disturbing is, given this was a Monster purchase from SpeedyFeetUK, these pedals were barely 2 months max of use.

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Looks like they are made of magnesium - same material used in skateboard axes. Had some of them broken and it looked similar. No fun, even at lower speed... 

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1 hour ago, One said:

Looks like they are made of magnesium - same material used in skateboard axes. Had some of them broken and it looked similar. No fun, even at lower speed... 

probably an aluminium-magnesium alloy, no?

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Poor pedal. Afaik it has 120 kg max static load? 100 kg rider jumping off a curb exceeded this load significantly. Nevertheless their metal quality looks very disturbing. 

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2 hours ago, Radislav said:

120 kg max static load? 100 kg rider jumping off a curb exceeded this load significantly.

I wonder if the rider landed with soft knees or landed with locked knees?  I bet there would be very little chance of pedals breaking if you use the legs to absorb the shock.  

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42 minutes ago, steve454 said:

I wonder if the rider landed with soft knees or landed with locked knees?  I bet there would be very little chance of pedals breaking if you use the legs to absorb the shock.  

which shouldn't be understood as passing the responsibility though

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1 minute ago, Mono said:

which shouldn't be understood as passing the responsibility though

Yes, I agree, the pedals should be much stronger and be able to take shock loads much higher than the rated load, just like wire rope used in cranes.  The load test should be many times higher than the rated strength to ensure safety.

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You mean Gotway's claimed procedure of testers riding with other testers on piggyback isn't good enough ;)? (read: sarcasm)

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3 minutes ago, houseofjob said:

You mean Gotway's claimed procedure of testers riding with other testers on piggyback isn't good enough ;)? (read: sarcasm)

It is if they fall about four feet from one level down to another:P

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Okay, now I get it.  A 140 pound man and a 100 pound woman can safely ride a Gotway piggy back style, if they don't drop off a curb.:smartass:

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4 hours ago, Mono said:

probably an aluminium-magnesium alloy, no?

From Wikipedia, alloys are strong.  Maybe they didn't use enough aluminum for strength.  Sounds like a magnesium- aluminum alloy which is what you meant to say, unless I am wrong.:facepalm:

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7 hours ago, steve454 said:

From Wikipedia, alloys are strong.  Maybe they didn't use enough aluminum for strength.  Sounds like a magnesium- aluminum alloy which is what you meant to say, unless I am wrong.:facepalm:

Unless it has too much air bubbles inside :) 

No official complaints to them, I suspect. No official free pedals exchange program will be issued. All the manuals are full of warnings not to do any acrobatics and jumps. Nevertheless, Kingsong improved their pedals. Silently GW will do the same, imo.

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Pedals and pedal arms (attach to axle) take quite a beating hauling (some of our) lard asses around, never mind jumping off kerbs, walls, being thrown down the road, etc.  I'm going to Give Gottproblems the benefit of the doubt and assume this is either a one off, or this pedal sustained a hard impact that the rider might not have been aware of.  after all, when they're bouncing down the street, and we're tumbling through the air, we aren't really in a position to monitor each individual impact the machine has to endure. And with the Monster' higher weight, any tumbling impact sustained by a pedal, has all that extra weight behind it. 

I Would agree that a few visual inspections aren't out of order; in fact I'm going to inspect my SingSong pedals now.  Pedals are pedals.

when more of these show up, I'll reconsider my opinion. Gottproblems may have a few.....eh...problems, but this is not one of them, yet, unless there are other pedal breaks out there we haven't heard about.

Edited by Smoother

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I wonder whether a redesign of the pedal might be in order.  If the hinge attachment were made of steel and the pedal bolted onto it I wonder if that would eliminate these sorts of failures completely.  In addition that would benefit riders who want to swap out pedal sizes easily. It's basically a hinge that has to resist a small arm lever with significant force applied to it.

Is it just for weight savings that aluminum alloy and magnesium alloy pedals are being used?  Regular bicycle cranks and pedals don't normally break off even with rugged use (eg.  mountain biking).  Why not use a similar alloy? I think it might be a chrome moly steel which some tools are made of.  It's super strong and doesn't tend to break as long as it's a proper thickness.

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I vote for Titanium pedals!

Or Adamantium! unlesss that's not a real metal alloy, which it isn't~ <_<

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