Where can I get a left hand crank arm only?

jeffwode

When I was putting new pedals on my bike, I very stupidly forced the pedal a bit, and now the threads in the crank arm are shot. The pedal threads seem fine.
Is there anywhere I can get a left hand crank arm only without having to shell out for a whole chainset? My existing chainset is a FSA Gossamer MegaExo in 175mm. If anyone can point me in the right direction I'd really appreciate it. Will any 175 mm crank arm fit or do I have to get a specific type?

Raam

A good bike shop might be able to re-tap the threads for you. Maybe.

jeffwode

I doubt it Raam. I cycled a few km on it and it's gouged pretty badly. I considered Isopon or some kind of adhesive, after all the pedals are cheaper than the crank arms or the chainset. Has anyone ever tried a bodge like that?

07Lapierre

jeffwode wrote: »

I doubt it Raam. I cycled a few km on it and it's gouged pretty badly. I considered Isopon or some kind of adhesive, after all the pedals are cheaper than the crank arms or the chainset. Has anyone ever tried a bodge like that?

Put the pedal on from the opposite side. this will "retread" the crank. worth a shot!

Raam

It might be worth getting someone to check. I'd rather pay 15 quid for labour than 150 for a new crankset.

quietsailor

jeffwode wrote: »

I doubt it Raam. I cycled a few km on it and it's gouged pretty badly. I considered Isopon or some kind of adhesive, after all the pedals are cheaper than the crank arms or the chainset. Has anyone ever tried a bodge like that?

I saw this thread on the main page as I know none of you will recognise me - I never posted here before

How much are you talking for a full set of cranks? Any repair is possible, it just depends on how much you want to spend.

1. Plastic metal/isopon and file to shape plus rethreading (don't think this will work as the layer will be too small)
2. Use a helecoil to re-make the thread. Heli-coil home page(Google helecoil for more info, that was just one I picked) other example
3. Get someone to make an insert - either push/press fit one ( it's the seventh or eighth picture down) or a threaded insert

THe third option would be best. If your wary of push fitting something as small as this think of getting the threaded insert - all you have to do is drill the existing hole wider, tap it to the new size needed for the insert and use a very strong thread lock fluid on the OUTSIDE thread - where it touches the crank.

C3PO

Good news ... and bad news! I have a complete FSA Gossamer crankset that came off a bike I bought 2nd hand! Only in reasonable nick but does have the advantage of being free if you want to collect it in Shankill! Bad news is that it's 172.5 in length!

Harto45

Jeff, let me know how this goes as I'm in a very similar position. Been trying everywhere for a new crank arm and resigned to getting a new chainset at this stage. Also an FSA chainset but not Gossamer and is 172.5

jeffwode

That's an excellent post. Thanks for looking in. With posts like this, you'll be welcome on the cycling forum any time.

jeffwode

Now there's an offer no man could refuse. Thanks a million. Will you pm me your contact details and I'll get in touch? Thanks again.

smalltalk

Hi,had to buy a LH crank arm last week for similar reasons,I got one from here
http://www.petracycles.co.uk/cranks-c-253_170.html
FSA omega megaexo LH crank,just over 30 Euro delivered.

Harto45

smalltalk wrote: »

Hi,had to buy a LH crank arm last week for similar reasons,I got one from here
http://www.petracycles.co.uk/cranks-c-253_170.html
FSA omega megaexo LH crank,just over 30 Euro delivered.

Thanks smalltalk

jeffwode

Thanks smalltalk.