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Home > Forum > Triathlon Forum > RESOLVED Crank Arm Repair - Tap Kit/ Tools Recommendation

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RESOLVED Crank Arm Repair - Tap Kit/ Tools Recommendation
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MattRBrewer
Oct 16, 20 19:51
Post #1 of 10 (1064 views)
Any recommendation on a tap kit to repair crank arm threads? I'd assume there is a tap out there that is not branded to be used for bikes and much cheaper. Share your wisdom below.

UPDATE: My LBS tapped this for me for $16.24; I am now back to having two pedals!
Last edited by: MattRBrewer: Oct 17, 20 12:24
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Re: Crank Arm Repair - Tap Kit/ Tools Recommendation [MattRBrewer] [ In reply to ]
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jaretj
Oct 16, 20 20:51
Post #2 of 10 (1058 views)
Since there are many different cranks out there can you let us know what you have?
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Re: Crank Arm Repair - Tap Kit/ Tools Recommendation [MattRBrewer] [ In reply to ]
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fredly
Oct 16, 20 21:04
Post #3 of 10 (1054 views)
here you go
Tech writer/support on this here site. FIST school instructor and certified bike fitter. Formerly at Diamondback Bikes, LeMond Fitness, FSA, TiCycles, etc.
Coaching and bike fit - http://source-e.net/ Cyclocross blog - https://crosssports.net/ BJJ instruction - https://ballardbjj.com/
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Re: Crank Arm Repair - Tap Kit/ Tools Recommendation [fredly] [ In reply to ]
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jaretj
Oct 16, 20 21:10
Post #4 of 10 (1052 views)
Is he looking for the pedals threads? Crank arm threads?
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Re: Crank Arm Repair - Tap Kit/ Tools Recommendation [fredly] [ In reply to ]
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jimatbeyond
Oct 16, 20 21:11
Post #5 of 10 (1049 views)
fredly wrote:
here you go


Boom!
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Re: Crank Arm Repair - Tap Kit/ Tools Recommendation [MattRBrewer] [ In reply to ]
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MattRBrewer
Oct 16, 20 21:15
Post #6 of 10 (1046 views)
Thanks for the replies. I know I can get that Tap set on amazon, I would just need the threaded insert that threads onto the pedal and into the tapped hole. Suppose I should post in Classifieds
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Re: Crank Arm Repair - Tap Kit/ Tools Recommendation [MattRBrewer] [ In reply to ]
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fredly
Oct 16, 20 21:16
Post #7 of 10 (1044 views)
are you looking for helicoil set? What kind of cranks are these?
Tech writer/support on this here site. FIST school instructor and certified bike fitter. Formerly at Diamondback Bikes, LeMond Fitness, FSA, TiCycles, etc.
Coaching and bike fit - http://source-e.net/ Cyclocross blog - https://crosssports.net/ BJJ instruction - https://ballardbjj.com/
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Re: Crank Arm Repair - Tap Kit/ Tools Recommendation [fredly] [ In reply to ]
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MattRBrewer
Oct 16, 20 21:18
Post #8 of 10 (1037 views)
These are carbon sram cranks. I would be attempting to do the repair in this video
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Re: Crank Arm Repair - Tap Kit/ Tools Recommendation [MattRBrewer] [ In reply to ]
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fredly
Oct 16, 20 21:22
Post #9 of 10 (1031 views)
Yeah, you're looking for a helicoil set. This doesn't typically work on carbon cranks, buy worth a try.
Tech writer/support on this here site. FIST school instructor and certified bike fitter. Formerly at Diamondback Bikes, LeMond Fitness, FSA, TiCycles, etc.
Coaching and bike fit - http://source-e.net/ Cyclocross blog - https://crosssports.net/ BJJ instruction - https://ballardbjj.com/
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Re: Crank Arm Repair - Tap Kit/ Tools Recommendation [MattRBrewer] [ In reply to ]
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fredly
Oct 16, 20 21:54
Post #10 of 10 (1010 views)
You can find all the stuff you need here. "Pedal thread" taps aren't going to work for this, you need a different size entirely. As I said earlier, this typically doesn't work on carbon cranks; the threaded insert in them doesn't have enough material, and isn't designed to take this kind of load. It will pretty often just start spinning inside the crank arm when you try to tap it.
Tech writer/support on this here site. FIST school instructor and certified bike fitter. Formerly at Diamondback Bikes, LeMond Fitness, FSA, TiCycles, etc.
Coaching and bike fit - http://source-e.net/ Cyclocross blog - https://crosssports.net/ BJJ instruction - https://ballardbjj.com/
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