How To Replace a Clogged or Bent Presta Valve Core on a Tubeless Tire in 2022 (Updated! 4K)

[@TivonSanders]

I really needed this video. I've been seeing so many people "remove" the core the ghetto way (which was them only removing the lock nut so the small pin can move freely into the tube) to inject sealant in, but that wasn't "professional" enough for me. This is the proper, and best way. Thanks!

[@TheMarkList]

You're welcome! Wanted it simple and easy to understand!

[@craigscott3133]

Can’t tell you how long I’ve ridden with bent valves, worrying about them breaking. You made the solution simple. Thanks!

[@TheMarkList]

Good to hear! They're super easy to replace and inexpensive too.

[@nniikkooll]

First day on my new bike w tubless prestas and I blew out the valve. Never ever had that with Schraders. Thanks dude 👍 helpful vid.

[@TheMarkList]

Glad I could be of help! let me know if you need help with anything else... happy to do a video on it!

[@sergei7502]

Just want to say thank you for the information. I'm new to biking, and your video helped me out.

[@TheMarkList]

Let me know if you have any questions about anything else!

[@davidlloyd1389]

Thanks. Great job. Just had Pesta valve break apart. Super helpful.

[@TheMarkList]

@@davidlloyd1389 glad it helped. They can be a pain in the ass.. Especially when they slowly leak!

[@w7i7n7k7]

Great simple video, just what I needed to see. Thanks!

[@TheMarkList]

Glad it helped! Let me know if you need help with anything else. Happy to post a video on it..

[@63Baggies]

Totally agree with Winston. mark absolutely 'nailed it' his presentation was engaging , clear and concise.😀

[@TheMarkList]

@@63Baggies Thanks for you kind words! Let me know if there's anything else you'd like me to do a video on. Got a few on deck but i'm here for you guys!

[@jbteecha785]

Thank you! I had a bad valve core but didn't really know it, I tried to pump up the tire and it just backed up into the pump like you explained. I didn't have a clue how to fix the problem until I watched your video. So I ordered a little kit with the tool and valves and I will try to fix it. Thanks again!

[@TheMarkList]

You're very welcome! Happy to help!

[@martincondit3724]

So helpful. Thank you :)

[@TheMarkList]

You're welcome!

[@noybfibonacci]

Mark, Nice simple video and great info on replacing a presta valve. Had watched a different video that had indicated if the presta valve was bent , the entire tube needed to be replaced., which didn't make sense to me. So well done!

[@TheMarkList]

Justin, it depends on your tube and/or if you're running tubeless. A new core is less than a buck and super easy to replace. Some tubes you can replace it. Just be careful not to twist too hard as to damage the tube - if it is indeed removable. I've been running tubeless on my gravel, enduro and dh bike and haven't used a tube in ages... so I'd have to actually grab a tube to check and confirm it's doable! Hopefully it is!

[@manoz6194]

Some cheaper tubes don't have removable cores though

[@MTBMOR]

I have a little baggy full of these as well as complete valves just in case. The more you ride the more stuff you learn to use and collect.

[@legiman1918]

kzbin.info/www/bejne/sHiofpyLfJyhf7c

[@Lazerbadger2]

Thanks, helped a lot. FYI you can use the tools he shows, or just loosen it with some pliers and then take it off by hand. Worked great for me!!

[@TheMarkList]

Pliers will work, just be careful as you can damage the valve core using pliers.. thanks for the comment!

[@Lazerbadger2]

@@TheMarkList hahah thanks. That’s the first thing I was worried about when I did it. I was really careful

[@TheMarkList]

@@Lazerbadger2 smart!

[@hKBFC90]

This was super helpful and took me a few mins like you said. Thanks!

[@TheMarkList]

You're welcome! Glad it helped!

[@keithschultz9016]

you were excelant i your explanation i liked especially the use of the dust cap with the tool fiting

[@TheMarkList]

@@keithschultz9016 glad it helped!

[@virkelie2]

Your explanations are very clear.

[@TheMarkList]

Thanks for the comments and compliment! I try to be as clear as possible..

[@j908w2]

Great video, thanks for the help!

[@TheMarkList]

any time! hope it helped!

[@SayantanAuddy]

Nice clean video. Just the information I needed. Thanks :)

[@TheMarkList]

any time! and just an fyi, if you're running tubes, some tubes you can replace the valve core and some you can't (they're fixed)... if that's the case, you'll need to replace the entire tube.

[@VincentGB]

Super useful. Thank you!

[@TheMarkList]

You're welcome!

[@Gabe-lk8nv]

Thx for detailed video!!

[@Sally-anneCox]

Great Video, clear instructions, Thank you.

[@TheMarkList]

You're so welcome!

[@DavidLoweimages]

Great video, very informative and helpful.

[@TheMarkList]

thanks Dave! appreciate the feedback

[@gerardhoward3084]

Thanks for posting very helpful

[@TheMarkList]

You're welcome! Glad it helped you out

[@rockingrolling3503]

Just what I needed, thank you 😎

[@TheMarkList]

Any time! let me know if you need help with anything else and i'll do a video on it!

[@rockingrolling3503]

@@TheMarkList awesome and thanks again 😎

[@l0g1c60]

Do you need All the tools or just one? Also the thing where you press to get the air out broke so whenever I press it the whole thing comes down, any help is appreciated

[@TheMarkList]

any of the tools will work. You can also use some needle nose pliers. You may want to remove it with pliers and then put a new valve core in to fix the broken one.

[@l0g1c60]

@@TheMarkList is it ok if I can private message you, so I can provide more details and send some pics of my situation

[@TheMarkList]

@@l0g1c60 sure, my email is [e-mail]

[@mitch-ur1ip]

Appreciate the detailed explanation. Thank you!

[@TheMarkList]

You're welcome!

[@years1132]

Hi thanks for the video, I just wanna ask if the thing is clogged and air won’t come out, do I just remove that core anyway? Thanks ❤

[@TheMarkList]

yes I would remove it and see what’s clogged. There may just be dried sealant at the bottom of it that needs to be removed by hand.

[@Sara-sh4jw]

Hi, thanks for the video, made things look more easy. One question, is there different size valve cores or are they all standard size for a push bike?

[@TheMarkList]

Most are the same size.. There may be some proprietary sizes for different tubeless valves but for the most part, the same. I'm going to look into this for you.

[@mrblueskynm3968]

Thanks! I recently got my first bike with a presta valve and I just noticed my valve was bent and I wasn't sure if I needed to take the whole valve off to fix it.

[@TheMarkList]

any time. let me know if you need help with anything else.

[@mrblueskynm3968]

@@TheMarkList Cool, I appreciate the offer. I just set up my new repair stand and replaced the presta valve. I also got to try my CO2 inflater to see how well it works. Everything is working out great, just waiting for my chain lube so I can wash and lube the bike. Cheers!

[@andrewpham8665]

New Subscribers. Thanks Mark. Have about 700mi. Mine are bent. Are cores generic so I can buy any core? I have small leak so would have to pump after 2 weeks of not riding. Do I really need to add sealant? I bought bike 5 years ago and never added sealant.

[@TheMarkList]

@@andrewpham8665 sealant dries up quickly.. I replace mine every couple of months. And yes, most cores are generic.

[@CodeSolid]

Nice and clear. Good job. Liked.

[@TheMarkList]

Thanks for the kind words!

[@SirCamsmorethanalot]

Can you use pliers carefully if you don't have those tools?

[@TheMarkList]

absolutely.. I used to use needlenose pliers until a bike mechanic gave me a hard time about it.. but yes, you can absolutely used needlenose pliers or some other type that has a ridges on the inside to provide grip etc. Just be careful to grab below the little knob that you actually unscrew.

[@roberthall7307]

Excellent video - thanks a lot!

[@TheMarkList]

You're welcome! Happty to help!

[@DaylightRob210]

Excellent. Thanks !

[@TheMarkList]

Any time! Will be posting more soon...enjoy the rest of your weekend!

[@davidbryanwoodworksandmore]

Hey cool video. I’ve got a presta valve core that is removed but the air won’t come out of tire. I can’t put air into tire with core installed either. Is there something that is in the tire to keep air from coming out when removed? And when I put core in the air won’t go into tire. Which is why I removed the core in first place. I’ve never had this happen before.

[@TheMarkList]

Take a 2mm Allen wrench and shove it into the valve once the core is removed. Most likely it's clogged with dried sealant. I'll post a short today on how to do it.

[@davidbryanwoodworksandmore]

@@TheMarkList actually that’s what I did. It was dried up inside. Thank you though for responding.

[@judeanthonycadano5082]

Are all presta valve core removable?

[@TheMarkList]

No, but the majority are...

[@rangersmith4652]

Reason tells me a bent presta valve stem can probably be coaxed into being straight again, perhaps not perfect but certainly usable. If you have a balky or leaky non-removable core -- and many cores are non-removable -- it might make sense to try straightening it before tossing the whole tube. Care must be taken, of course, because it's made of brass, a very soft metal that work hardens and becomes brittle. It if breaks off, you're replacing it for sure.

[@TheMarkList]

Absolutely! Really depends on the situation. They do break a lot when trying to bend them back!

[@sp1ng0]

Hey i have a dodgy presta valve with the exact issue you showed first, doesnt stay up when you press it down. However i dont have a presta valve that can just be unscrewed so im not sure what to do, any help would be good.

[@TheMarkList]

@@sp1ng0 if it doesn't unscrew you may need a new tube... Assuming it's on a tube that is

[@fahrudinsijercic8437]

I can’t put valve core in my bike. I separated one more part of valve b/c core doesn’t fit. Core can be put inside on last wider part but I am using tool I can’t even turn b/w tire those tire lines. Due to my lack of English I note 4 standar cores / they look like yours and this tool with 4 features. Last year my daughter fix in private garage and I don’t know why she got different valve?? One tire is still good never fixed due to using women Shimano bike. Do I need maybe different core valves to by. Thanks in advance 😊

[@fahrudinsijercic8437]

And I really understand your video. / English. Even though it’s been a while you recorded it’s still helpful 🇧🇦🇨🇦👌

[@TheMarkList]

I’d take it to your local bike shop and see what they say. Without being able to see it, I can’t give you a good answer!

[@robsimpson3320]

Great video! Thanks!

[@TheMarkList]

Rob, thanks for the kind words and you're welcome! Have a great night!

[@davidmclachlan6888]

While unscrewing my presta pump adaptor the valve core blew out at high pressure. Given the tight fit of the adaptor that you screw on what keeps it from acting as a valve core wrench and loosening the valve core each time? It freaked me out blowing out at 85psi and both the stem and my adaptor went flying in the backyard. Shouldn’t the thread go the opposite direction to avoid this?

[@TheMarkList]

If you're using an adapter for your pump to fit, don't screw it on so tight. Just snug. The valve core should be nice and tight so as not to accidentally unscrew.. Like I think happened with you.

[@JoshCheron]

Easy enough. Thanks!

[@TheMarkList]

Glad it helped!

[@ViorelSnap]

Can I replace the valve core without deflating the tire fully? I don't have a very high pressure pump at home, I want to be able to inflate it back after I replace the core.

[@TheMarkList]

Once you take the valve out, it's going to deflate fully

[@ashIay]

You said before I unscrew the broken valve core I have to press down to let the air out, but mine wont let any air out when I press on it. Do you have any suggestions?

[@TheMarkList]

Just unscrew it. It may fly out but it's broken anyway so if it gets lost you'll be replacing it anyways

[@ashIay]

@@TheMarkList Alright, thank you very much!

[@TheMarkList]

@@ashIay you're welcome! Let me know if you have any more questions!

[@joanie4c]

This was good, but my problem is that the lower, internal part of my valve core did not come out when I removed my valve core. I need a way to get it out. Tweezers don’t seem to be working.

[@TheMarkList]

Do you have a photo of what came out of the valve when you removed the stem?

[@joanie4c]

@@TheMarkList I had to get the stem replaced because that piece was stuck in there.

[@dazzer24]

Hi mark. My valve core is stuck and won’t let me deflate. If I remove the valve core whilst fully inflated am I going to get loads of sealant spewing out?

[@TheMarkList]

Spin the wheel so the valve is in the top (12 o clock) position. Then take the valve out. The sealant will be at the bottom (6 o clock position) and should have minimal spray or leakage. I'll do a short on it today.

[@dazzer24]

I’m actually quite proud of myself. I genuinely though that might be the answer after I’d asked the question. Thank you for confirming 👍 great vid btw. Nice and simple. Which suits me 😉 Look forward to the short. I’ve only a standard track pump but hopefully I’ll be able to blast enough to get a seal again.

[@paulahavens2764]

thanks this really helped. My Presta valve broke but the tire did not go down, It stayed sealed and I drove 50km and the tire stayed up all the way. Now I know how to change the core I can take a core from my spare and just replace the core and keep on going. Great video. Sometimes it is hard to get the pump on a tire is there an extender that you can put on a tire so you are away from the rim and then put the pump on?

[@TheMarkList]

I do believe they make an extension you can screw on an existing valve stem.. ideally, get a longer stem next time which helps with deep rim profiles.

[@zylus6198]

Can I still do this if the tip of my valve flew off?

[@TheMarkList]

You should still be able to remove the valve core if the little threaded piece came off (and put a new valve core in).. send me a pic at [e-mail] and i'll let you know.

[@infiniteawaken1]

My new presta valve doesn't seem to fit into the valve . Is there something stuck in the valve ?

[@TheMarkList]

Do you have custom/brand name valves which could be different sizes? Or, yes, it’s clogged. Take a paper clip/thin strong wire and plunge it a few times then try again. If that doesn’t work,let me know!

[@infiniteawaken1]

@The Mark List it doesn't seem clogged ! The new prestas are the right length just don't quite squeeze in width ways ! They are AOBETAK presta valves from amazon

[@TheMarkList]

@@infiniteawaken1 send photos to [e-mail]

[@infiniteawaken1]

@The Mark List thanks! iv emailed you some pics .Hope you've received them.

[@mikew3737]

So I can’t let the air out either due to it being clogged. It’s been 3 weeks and still at like 50psi. What can I do lol

[@TheMarkList]

Unscrew the valve.. It'll fly out but all the air will be let out too.. Then you can see what's clogged etc.

[@angelikikoumela580]

Hi I remove mine and it is missing the bottom part, it is stuck in the tube cause when I put the new one I couldn’t inflate it properly. Any ideas?

[@TheMarkList]

You might just need a new tube altogether..take it to you local bike shop and ask them what's wrong.

[@angelikikoumela580]

Thanks I already made an appointment

[@carltoneasy9984]

Thank you 🙏🏽

[@TheMarkList]

You're welcome!

[@viper3636dr]

What about removing one that has a flatless core?

[@TheMarkList]

@@viper3636dr I'm not sure what you mean by that?

[@mrunknown1997]

My new presta valve won't go in, what can i do? And it dosen't get stuck in The core

[@TheMarkList]

Hmm... Is it clogged with sealant? Or stripped? I'd take it to your local bike shop if you're not sure what to do next. I can't see what's actually going on with it so not sure exactly what to tell you!

[@Harmonyandspirits]

mine got bend then it fell off and now half of it is stuck inside how do i get it out :(

[@TheMarkList]

Are you using tubes or running tubeless? If tubes, just replace the tube if you can't unscrew the valve. If tubeless, get a new valve stem with a new core in it.

[@Harmonyandspirits]

@@TheMarkList thank you it says tubeless ready i will buy new stem and core :)

[@TheMarkList]

@@Harmonyandspirits ok, so it probably has a tube in it. Take your tire off to make sure or take your wheel with you to your local bike shop and have them check.

[@Harmonyandspirits]

​@@TheMarkList thanks i think i will do the local bike shop :)

[@powsno4485]

Thanks!!

[@TheMarkList]

Any time!

[@davidadams421]

Spent about an hour trying to replace a presta valve on my bike, used all you tips and just failed every time. Put my glasses on then realised the valve wasn't a replaceable type! I was trying to shear steel with aluminium tools!

[@TheMarkList]

Amazing what being able to see will do! I do the same with my glasses all the time. Glad you figured out it was not removable. Definitely frustrating up to that point!

[@andykrask3184]

simple clear

[@TheMarkList]

Glad it helped!

[@blackfireacid315]

Ive just realised i broke mine, i threw out a tire before cause i didnt realise this was the problem how do you avoid breaking them, i was just trying to fill my tire and then i heard a click and all the air went out

[@TheMarkList]

you just have to be careful! It also depends if you're running tubes or are tubeless. Let me know if you have any other questions or issues.

[@santos886]

What if it has no air ?

[@TheMarkList]

@@santos886 not sure what you are asking?

[@santos886]

@@TheMarkList got figured out thanks 😅

[@TheMarkList]

@@santos886 good to hear!

[@brandonstrong6846]

Thanks Marky Mark... now lets see you rip the KTM haha. Cheers.

[@TheMarkList]

Thanks brother! I'll be putting up tons of basic starter questions and skills for multiple sports, equipment and game changers that I've discovered over the years. Thanks for the kind words!

[@meszaros_gyula]

Everything You Always Wanted to Know About Presta Valve (But Were Afraid to Ask)...

[@TheMarkList]

Exactly! Hopefully I was able to help! Next video coming up will be Everything you wanted to know about Torque Wrenches :)

[@maranatha3333]

What causes the valves to bend? Happens a lot with the tubes I'm using. Looks like they stick out too far when the nut is backed off for inflation.

[@TheMarkList]

absolutely.. usually happens when you're taking off the pump in my opinion or you leave open and it hits something. Good question though!

[@maranatha3333]

@@TheMarkList How far should I back out the little nut for inflation?

[@TheMarkList]

@@maranatha3333 i always back it out all the way and I'm careful when popping off my bike pump when done

[@BRM1966]

Why replace it, tubes are cheap? My tube has a very slow leak, takes almost 24 hours to be flat, after 16 hours tube isn't too flat to ride on. Tube is fairly new too. I kept patching a tube over and over until on one ride the valve stem blew out and stranded me along the road.

[@TheMarkList]

If you're running a tubeless setup you'll need to replace it.

[@goldenoatie]

Not worth the hassle. Change the tube to Schrader. End of problems.

[@TheMarkList]

So most mountain bike tires run a tubeless setup as do most of the newer road bikes/gravel bike wheels and tires. A new valve core is about a dollar and takes 30 seconds to change. A tube is more expensive, heavier and takes longer to install and change. Also, you're more likely to get a pinch flat with a tube then with a tubeless set up. A new tube certainly is an option, but with most modern bikes going to a tubeless setup, it's bit antiquated to replace it with a new tube.

[@BlazingShackles]

the dude at bike bling gave me Stans No Tubes thingy. I couldnt get it to work at all. it wouldnt go down over the valve stem. POS and waste of $10.

[@TheMarkList]

Sorry to hear this!

[@davidmccullough9453]

What the HELL is wrong with the old style???!!! These new things are completely idiotic! I don't have a tool to tighten the existing one that comes loose when I put the adapter for filling on! I don't understand how this is a better system! STUPID!

[@TheMarkList]

Yeah, they can be frustrating. For tubeless systems they're smaller and require a smaller hole in the rim etc. Hopefully you get it all tightened up!

[@neychev]

Just shows how stupid are French valves in comparison to standard ones

[@offthegridliving3339]

God do i hate these valves. They are garbage

[@TheMarkList]

They can definitely be a pain in the ass sometimes!

[@mts7274]

God do I love these valves. They are treasure!

[@rob.ale90]

Thanks!