How to repair stripped pedal threads on the crank arm. In this video, I use the Unior pedal tap repair kit. It comes complete with the two in one reamer and thread tap and the left and right bushings (Helicoil). You just need to purchase a heavy-duty thread locker such as Loctite 271 Red and a T-handle tap wrench to fit the reamer. Down below is the link to locate the tools and the parts. Please shop around before buying it.
Left side Unior pedal tap https://amzn.to/3LeeJlS
Right side thread spike insert https://amzn.to/359nTAN
Unior Pedal tap kit:
Loctite Red 271: https://www.amazon.com/Loctite-Threadlocker-0-20-209741-Henkel/dp/B01MU1VBTY/ref=sr_1_2?dchild=1&keywords=271+threadlocker&qid=1569872946&s=sporting-goods&sr=1-2
T handle wrench (at least 1/2″): https://www.amazon.com/Hanson-12002-T-Handle-Tap-Wrenches/dp/B00004YOB1/ref=asc_df_B00004YOB1/?tag=hyprod-20&linkCode=df0&hvadid=167133658256&hvpos=1o1&hvnetw=g&hvrand=12902031860081193994&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9032179&hvtargid=pla-306161213725&psc=1
I think I can fix my left stripped crank arm myself; however, I would prefer a professional. Now I know what repair to ask for.
Hi, What if majority of my threads are ok? I had screwed up and now my i cant seem to get it past the first few
The grey grease is likely a molybdenum disulphide (moly) based grease. They are very slick and grey colour like what you found.
April 2023 Question: I followed all of your instructions, and the tap went through very easily. But, the 9/16 helicoil would neither fit over my pedal, nor would it screw into the pedal crank! So, I'm not sure what sized devices (tap;helicoil) to buy, as I'm not so good with measuring or fixing things like this. Can you tell me what's the next slightly larger size is, in order to fix this? I have a mtb from China, and the dealer told me the size is universal. Would the next size up be too big 7/16 I think?
Beautiful video
So the thread kit is 9/16 and bushing or helicoil is 5/8?!
Ah finally found the right video solution and the products I need to order. Thank you, you solved a problem nagging me for weeks!
It looks like Unior has discontinued the kit, but added a new kit to their site with a tap handle for $300. Kinda rough for just fixing a crank set arm!
The taps and tap handle are easy enough to source elsewhere, but the thread inserts are a bit harder to find. How can Unior be the only ones that make them at 9/16" 20TPI?
size of that helicoil
I find that any existing thread from back side of the arm is a good quote for the thread cleaner/cutting tool
Thank you for very informative video💯🙌
hi, what size is the tapping rod?
What is the size if the helicoil thanks
How about installing helicoil on Shimano crank arm pinch bolts? I find myseld in a situation now that I've stripped those pinch bolt areas as I kept on removing and reinstalling for a deep clean.
Hi I love your video and I will work on my right hand pendal which have wear out and I would be using your video to fixed. My bike is Carera Crosscity ebike Folding bike. I will send you a feed back too.
Hi, I need some advice. My bike's right pedal crank arm's thread stripped.. pedal thread size is 9/16, 20 TPI. What's the size of Thread Tap I should use for the crank arm thread? I tried with 9/16, but the thread insert (9/16 20 TPI) is not going in… Should I use 5/8 20 TPI for crank arm thread? Thanks in advance..
We're did you bought that ?
What size is the thread insert?
Boom! Subbed, I needed to look this up for work in the shop. You just hack off the extra or leave it on?
Isn’t it better to buy a new crank arm?
I solved this problem for 20.00 no kit/no welding no adhesive. Straight fix and simple.
Question: If I am repairing the left pedal instead (vs. the right in the video), does the coil and threading tool go in clockwise also? (I understand for the left side, the pedal tightens counter clockwise). Thank you.
Thanks for this tutorial. I just bought a vitus nucleus and ony first ride pedal gor loose and came a bit off. Then i noticed a bit stripped thread. Can I claim warranty on this?
I've got a Pedal Crank Thread Repair Bush Bushing Insert 9/16-20 and size tap thread do I need for my Crank for it to fit in
i think i may have runied my thread on my giant tcr, but after watching this im not to worried as you explained it so well to fix..
Thanks for the very informative video. However, after checking the prices of the taps and pedals, I will probably just weld my pedal back on! Otherwise, I could buy a good used bike for the price of the materials needed!
I keep stripping the pedal on the left side of my bike thank you for the information
You need to reverse the tap around every turn to get rid of any steel chips. former machinist.
Thanks but my fatbike too broke my bike pedal treads broke what type of treads i need ?
Maybe a silly question but I have just bought the same parts for my left pedal. Do I need to screw the tap in anti clockwise? I'm a little confused and don't want to do it wrong way and wear it away