The price of learning to do it yourself..

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The price of learning to do it yourself..

Postby janus77 » Tue Jul 08, 2008 5:23 pm

So I thought the threads were stuffed in my cranks.. turns out there was 1 key peice of information I was missing when putting the pedals in:

Pedals are left and right side specific..

Oh yeah, forced them into the wrong sides.

now one of the pedal holes is completely routed (excuse the pun), but i can slide it in and out like a well lubed somethingorother.

damnit. bought a new crankset, big ring is larger than the old one, so the teeth sit within 1mm of the frame, there's some weird metal scraping noise too.
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by BNA » Tue Jul 08, 2008 5:25 pm

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Postby sogood » Tue Jul 08, 2008 5:25 pm

Never force any of the components together. If it doesn't fit, stop and think.
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Postby janus77 » Tue Jul 08, 2008 5:34 pm

thinking since the crank arms are the same length, and the left crank is the really bad one, I might just replace it with the newie, and hope the old one holds on the right side.. sigh
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Postby janus77 » Tue Jul 08, 2008 5:35 pm

Pedal fell off half way up the anzac bridge this morning, should be an interesting ride home, haha.
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Postby Caelum » Tue Jul 08, 2008 5:37 pm

you're excused, so long as you ARE actually learning...
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Postby janus77 » Tue Jul 08, 2008 5:53 pm

Hahaha, far out I hope so!

My commuter has copped the brunt of it, haven't got the nerve to try tinkering with the kenevans..
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Postby LuckyPierre » Tue Jul 08, 2008 5:54 pm

You can buy 're-threading' kits - try some-one like Moruya Bicycles or your lbs - although it might be simpler to buy new cranks. :?
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Postby mikesbytes » Tue Jul 08, 2008 5:56 pm

Oh well. A new set of cranks coming your way.

Are the pedals OK ?
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Postby janus77 » Tue Jul 08, 2008 5:57 pm

does re threading work though if the hole has been gouged out too much and is bigger than the pedal spindle?

or do the rethread kits attach a new peice inside the hole?
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Postby janus77 » Tue Jul 08, 2008 6:02 pm

the pedals are ok, but I'm not 100% sure the cranks fit. the big cog is larger than my current one and runs dangerously close to the frame..
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Postby vx255 » Tue Jul 08, 2008 6:08 pm

janus77 wrote:does re threading work though if the hole has been gouged out too much and is bigger than the pedal spindle?

or do the rethread kits attach a new peice inside the hole?


They make the thread in your crank bigger, then screw a metal piece that looks like a tightly wound spring called a helicoil in there and theres your new thread.


http://www.emhart.com/products/helicoil.asp
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Postby janus77 » Tue Jul 08, 2008 6:12 pm

Ah ok, I get you now.. I guess that could work.
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Postby ausdb » Tue Jul 08, 2008 7:16 pm

Helicoiling a crank is not an easy task to do properly, not that I have never done it but have put a few helicoils in other things over the years. The hole for the helicoil must be drilled and tapped in the same plane as the bottom bracket mounting hole so that it stays parallel with the bottom bracket in all planes, otherwise as you pedal your pedal will move in/out or up/down and feel all weird as if you have a bent pedal spindle.
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Postby twowheels » Tue Jul 08, 2008 7:16 pm

be aware also that the bottom bracket right hand thread MAY have a left/opposite/gas thread >>> sheldon brown i think explains why, BUT varies from BB to BB, so find out BB type/maker before you start playing around with BB
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Postby Mulger bill » Tue Jul 08, 2008 7:19 pm

IIRC the only BBs that don't run opposite threads on the cups is Italian, but I may be wrong...

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Postby Bnej » Tue Jul 08, 2008 9:26 pm

janus77 wrote:the pedals are ok,


Pedals will always be okay - cro-mo pedal threads vs aluminium crank threads, the pedal will win every time!

It's because the cranks normally cost more. ;)
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Postby munga » Tue Jul 08, 2008 9:47 pm

unbolt the old chainring and fit it to your new crank spider.
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Postby MountGower » Wed Jul 09, 2008 6:24 am

I'm curious about the clearence problem with the big ring. Are you sure the bottom bracket axle length is correct?
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Postby thomas_cho » Wed Jul 09, 2008 7:47 am

Its a bit late now, but almost all pedals are marked L & R. Given that you will be putting a lot of force on the pedals, might be safer to just get a new crankset. The Tiagra level HTII ones are nice, and not that expensive from PBK or Chainreaction.

Most bike parts are designed such that if one were to mount it incorrectly, the parts just will not fit in correctly. Eg, shimano crank arms for the non-drive side (HTII), they are splined slightly differently on each side to ensure that it can only fit in one way, which is when it is aligned correctly IRT the drive side crank arm.

With the clearance of large chainring to the your frame, I presume you are mounting the road chainrings to a road frame? You may have clearance issues when trying to put a road chainring on a MTB frame.

One thing you could do is to buy a spacer (I think they come in 2mm widths) and space out the drive side. You will have to adjust your front derailleur correspondingly tho.
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Postby mikesbytes » Wed Jul 09, 2008 8:54 am

Personally I'd just get a new crank set. As it will come with a set of chain rings, you will recoup a lot of the cost when it comes time to replace your existing chain rings.

If the chain ring is too close to the frame, then you can always replace the bottom bracket, they don't cost much.
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Postby m@ » Wed Jul 09, 2008 9:06 am

+1 for new crankset - especially if you'll be riding in traffic. You really don't want your cranks/pedals to fail under pressure. Many years ago I snapped a pedal spindle on my brother's old mtb. One minute I was out of the saddle, cranking up a hill, the next I was flat on the tarmac with a bike on top of me - any traffic in either direction and I would've been underneath it.
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Postby janus77 » Wed Jul 09, 2008 10:24 am

munga wrote:unbolt the old chainring and fit it to your new crank spider.


Unfortunately the new spider is larger too..
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Postby janus77 » Wed Jul 09, 2008 10:32 am

I think the new crankset is probably for road frame, not mtb.. though I'm not sure, it's an FSA Vero crankset.

http://www.chainreactioncycles.com/Models.aspx?ModelID=21848

So do I need to buy an MTB crank? fark.
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Postby janus77 » Wed Jul 09, 2008 10:35 am

Dangit, probably should have bought something like this:

http://www.chainreactioncycles.com/Models.aspx?ModelID=7600

Just wanted larger chainrings than currently on it.. hmm.

Anyone want to go in on an order from Chainreaction, delivered to Sydney?
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Postby Caelum » Wed Jul 09, 2008 11:07 am

*points janus77 towards the edit button*
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