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Trialtech cranks ruined!


Lrn2Trial

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Come home the other day and found that my nephew had been on my bike and the pedal was loose

but he didn't tighten it up he kept riding !

So I when I got on it and cycled I realised he stripped all the thread from the pedal end of the crank.

So Iv'e bought try all Isis cranks for a replacement

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post-35343-0-41746500-1367955709_thumb.j

post-35343-0-68221200-1367955767_thumb.j

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did you remove your pedal with easy after this?

I have a similar issue at the moment, and my pedal is stuck :(

keep turning in both directions but can't get it off

I was thinkin about cutting the crank with the angle grinder to have my pedal back

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I had my trialtechs helicoiled and it lasted about an hour, I guess it works for other people. From my experience I think new cranks is cheaper in the long run, so don't worry about buying them.

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http://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd=6&cad=rja&ved=0CHIQFjAF&url=http%3A%2F%2Fwww.uniortools.com%2Fcgi-bin%2Fcms.cgi%3Fdoc%3D10780%26prod%3D44810%26sid%3DE9vUIYXEzT861Fyz&ei=w0SKUfuSFe-g7AacqoCwDA&usg=AFQjCNGOW4WevGMW4LdRZouJzuRbthFpfw&sig2=l8xOqVYSK6TT5WicW_ed4g&bvm=bv.46226182,d.ZGU

we use those at work and even downhillers didnt get them to get ripped out again...

little trick is to insert the pedal a bit(prevents the insert from deforming at the next step),take a center punch and knock 2 little holes opposite to each other between the insert and the crank material,then turn the pedal out again a bit,then tighten it.

with that it can unscrew itself never ever again...

(Y)

Edited by FamilyBiker
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Helicoils are fine if they are fitted correctly, the hole needs to be the correct size for the tap to achieve 100% thread depth. It's difficult to dril the correct size hole with a cordless drill for example.

Althought if used in alloy they can be alot stronger than the original thread the fixing must be kept at the required preload to avoid damage and failure.

So not reply the correct application for a pedal which is going to be removed now and again.

Your much better off with a solid incert like the 'time cert' style which can be glued inplace. They are also better for a high tourque situation when the bolt or fixing will start to stretch which is when the Helicoil can fail.

If you pedal can be pulled out the hole might be to large, in

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did you remove your pedal with easy after this?

I have a similar issue at the moment, and my pedal is stuck :(

keep turning in both directions but can't get it off

I was thinkin about cutting the crank with the angle grinder to have my pedal back

No my pedal did not come out easily I had to just keep turning the Allen key until the pedal released,

The thread on my pedal was still in perfect condition but the thread on the crank was stripped completely.

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No my pedal did not come out easily I had to just keep turning the Allen key until the pedal released,

The thread on my pedal was still in perfect condition but the thread on the crank was stripped completely.

that was'nt working, so I cut the crank open with an angle grinder

bye bye crank :(

but the pedal is fine :)

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that was'nt working, so I cut the crank open with an angle grinder

bye bye crank :(

but the pedal is fine :)

Ye my pedal was fine after I removed my with force too I think the pedal thread is steel and the cranks aluminium.

But I've fitted Try-All cranks now that are 160mm and my old Trialtech ones were 165mm I'm not 100% sure but I think I can feel a difference or maybe it's because I haven't been on my bike for a few days.

So I recommend if you get new ones get the same size.

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Ye my pedal was fine after I removed my with force too I think the pedal thread is steel and the cranks aluminium.

But I've fitted Try-All cranks now that are 160mm and my old Trialtech ones were 165mm I'm not 100% sure but I think I can feel a difference or maybe it's because I haven't been on my bike for a few days.

So I recommend if you get new ones get the same size.

yeah, I think the one I have in stock isn't the same size either :(

but it will do the trick untill I bought a new pair ;)

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yeah, I think the one I have in stock isn't the same size either :(

but it will do the trick untill I bought a new pair ;)

Do you mean you going to ride with two different length cranks ?

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Do you mean you going to ride with two different length cranks ?

dunno for sure

first thing first

but if I don't have any other option when the sun is shining and I have a urge to ride

then I ll do that untill I order a new pair

is it that awefull?

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