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Could you help me identify my right crank?

Old 01-04-14, 10:35 PM
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kavonjoon
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Could you help me identify my right crank?

Hi all,

So i need to replace my right crank because unfortuantely the threads for the pedal are shot. Trouble is I don't know what to replace it with. I heard from a friend that there are lots of varieties of these things. So here is a picture of my crank.



I'm wondering if you could identify what type it is or if you could tell me if the following parts would work. (I'm pretty sure it's a square hole based on my memory of taking off the opposite side a while back)

https://www.ebay.com/itm/New-Old-Stoc...-/271345473322

https://www.ebay.com/itm/Used-Sakae-S...-/271285472994

Thanks for your help
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Old 01-04-14, 10:41 PM
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As an alternative to replacement, your pedal threads can be fairly easily repaired with a threaded insert which will make threads stronger than the original ones.
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Old 01-04-14, 10:55 PM
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As noted above, an insert is a very good way to make it as good (better) tham new, and shouldn't cost much. Inserts come in two basi types, solid bushing, or coiled wire. The coiled wire is superior and is actually used routinely on new aluminum parts in the aircraft industry, because it's stronger than simply tapping into the aluminum.

Either insert must be installed by a shop (You can DIY but the tools will be pricey), but any number of decent shops can do the job.

As for the crank, it appears to be a private label SR crank.
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Old 01-04-14, 11:02 PM
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Thanks for the replies. So any idea how much this would cost at a shop?
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Old 01-04-14, 11:14 PM
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Originally Posted by kavonjoon View Post
Thanks for the replies. So any idea how much this would cost at a shop?
Varies all over the boards. If there's a local bike Co-op, it should be about $15.00 or so, maybe less. If not, look for a smaller "dirty fingernails" family owned shop, where the owner turns wrenches rather than a fancy boutique.

If you can't get a decent price locally, consider sending the crank off to a shop that does this job routinely. You can call Yellow Jersey in Madison, or maybe some of the members here on the forum will give you a quote.

Lastly, if you list where you live, people might be able to refer a decent shop local to you.
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Old 01-04-14, 11:25 PM
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Go to NAPA or any decent automotive shop and by the kit and do it yourself. It's easy all you need is a drill. You drill out the hole and the kit has a tap that you turn into the crank and this makes new threads and then you screw in the insert and then you reinstall your pedal.
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Old 01-04-14, 11:50 PM
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Originally Posted by Kidd69 View Post
Go to NAPA or any decent automotive shop and by the kit and do it yourself. It's easy all you need is a drill. You drill out the hole and the kit has a tap that you turn into the crank and this makes new threads and then you screw in the insert and then you reinstall your pedal.
...I'd be very surprised if an auto parts place has the proper insert for bike pedals, which are kinda odd in threading.
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Old 01-04-14, 11:59 PM
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Originally Posted by 3alarmer View Post
...I'd be very surprised if an auto parts place has the proper insert for bike pedals, which are kinda odd in threading.
The RH 9/16"x20 used to be a popular spark plug size. Some 30 years ago I was able to convince one of the makers to introduce a bike kit, which they did for me at reasonable quantities because they were already 1/2 way there with the automotive kit, and wire. All they neede to do was make the LH tap, and wind the spring backward. I bought these 25 kits per order for years, until a fer mergers and acquisitions made the a tiny division of a large company that couldn't be bothered with this nonsense.

However the kit is only part of the deal. Not that many home mechanics have a power drill that can handle 9/16" drills or reamers. Some of the "repair" kits use a tap with a reamer built in (the ones I sold) but others don't.

BTW- so the OP has an idea, what would this run at the kitchen?
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Old 01-05-14, 10:48 AM
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BTW, practically all stripped pedal threads are due to either forced cross-threading or inadequate torquing, both of which are avoidable with a little care and patience.

So, lube the clean threads with grease or anti-seize (I use Tef-Gel), start them by hand and tighten them firmly with a proper pedal wrench. I use stainless pedal washers to help avoid seizing to and marring of the cranks' mating surfaces.
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Old 01-05-14, 12:48 PM
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So any idea how much this would cost at a shop?
I could only ask at my local shop what they charge, but that does not speak for the shop, you Will Use.

Your crank looks generic, the logo is the importer/ buyer .

Were you to go to the same company, and order in sufficent numbers, the factory will put Your Name on.
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Old 01-05-14, 11:46 PM
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Originally Posted by FBinNY View Post
The RH 9/16"x20 used to be a popular spark plug size. Some 30 years ago I was able to convince one of the makers to introduce a bike kit, which they did for me at reasonable quantities because they were already 1/2 way there with the automotive kit, and wire. All they neede to do was make the LH tap, and wind the spring backward. I bought these 25 kits per order for years, until a fer mergers and acquisitions made the a tiny division of a large company that couldn't be bothered with this nonsense.

However the kit is only part of the deal. Not that many home mechanics have a power drill that can handle 9/16" drills or reamers. Some of the "repair" kits use a tap with a reamer built in (the ones I sold) but others don't.

BTW- so the OP has an idea, what would this run at the kitchen?
...we do it as a service (at the manager's discretion, depending on the quality of the crank) for five bucks.
This is probably a little less than it will cost us to get the new inserts, but it's kind of a loss leader.

I just did one for a guy yesterday.
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Old 01-11-14, 01:35 AM
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Thanks for all the replies. Although I like to do things myself I don't have any tools at this point in life so I guess I will just take it to a shop. I live in Honolulu. Anyone on here in the area and know a place that is affordable and reliable?

Thanks again
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Old 01-11-14, 02:47 AM
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Old 01-11-14, 11:45 AM
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Old 01-11-14, 12:52 PM
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Co Ops may have bins of parts from donated bikes , so your membership dues, to join and support it.

will be your first expense ..
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