Stripped pedal thread on cranks?

Hello,

I have a couple pairs of nice cranks which have had the unfortunate luck of having their threads fooked.

(it wasnt me, honest)

Heres a picture:

Now from time to time I have heard people mention "pedal" inserts which can be used to remedy damaged threads.

Was wondering how available such a service is, and how much it costs?

theres this way of inserting a new thread, like a coil, into a bored out thread you already have.
Yours however looks ok, except the front part of it. Why not try threading a pedal from the opposite
side to re-align the threads cos pedal threads are pretty industrial.
Failing that just feed a new tap through it.

it's a lorra hassle - is this for fixed gear? If so I would be tempted not to do it - remember your drive train is also your brake...

heili coil. A heil coil set is quite expensive and hard to find, if your only going to buy it for one set of cranks it's too expensive but if you have lotts of sets to do it may be worth it.

My right pedal fell apart on my on my way to work today - ball bearings all over the place.
I got some new MKS AR2 pedals to replace them just now.... turns out it was impossible to get the broken pedal out with-out stripping the thread in the crank arm.

Anyway I need to replace it, but I have a Fillmore with weird bontrager outboard bearing cranks…. does this mean I'm going to have to replace the whole lot?

So did the pedal fall off leaving the threaded bit inside the crank?

If so (though feel free to correct me) I think you can get a threaded drill that can drill into the remaining bit of pedal & unscrew the remnants - I had a similar problem when I snapped the tremelo arm in my guitar; drilled the stump out & left the thread intact.

The pedal body came off, leaving the threaded bit and the rest of the pedal attached. It was a bit bent and, so when I used a wrench to take it off it stripped the some of the thread out. Result is I cant screw in my replacement pedal.

If I need to replace the crank I think I'll need to get a whole new crankset because outboard bearing bontrager bottom bracket doesn't seem to be compatible with anything.

depends if its the drive side or non drive side crank, should be able to replace just that side if its something still in production or available on ebay...

How much thread was stripped off as you may be able to re-thread the crank?

It's the right hand side that stripped.... It seems to be only the first few mm of thread there is a problem with - but I couldn't get the pedal to engage. I tried for ages.

Its a bontrager Race GXP

Do they have the allen key recess on the inside of the bit that screws into the pedal? It's much easier to get the threads to engage doing it that way as you can use one hand to hold the pedal in place and one to spin the allen key as you can get more rotations.
From the sounds of it the threads shouldn't have stripped.

Arducius.... I tried with the allen key, and will give it another bash tonight. Didn't seem to want to go in.

Try taking it to a good lbs where they should be able to re-cut the thread. If you try 'too hard' without re-cuttiing the threads you could end up cross threading and make it worse!

Have a look at this thread (no pun intended) - http://www.lfgss.com/thread13710.html

I've used these before - Recoil thread repair kits

However it may be as simple as running a tap through the crank to clean up the thread. Can you try fitting the new pedal from the other side of the crank, that may have the same effect in cleaning the thread.

Sounds like the pedal threads were not greased at install time.

Grease your threads!