How To Convert A Presta Valve Rim To Use A Schrader Valve Type Tube
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- Опубликовано: 6 окт 2024
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This video shows how to convert a rim that uses a presta valve to a rim that uses a schrader valve.
Thanks for Watching!
I have no idea who thought a presta valve would be a great invention!
If you have skinny rims for road tyres (tires, if you like) then there isn't enough room for an 8.0mm Schrader bicycle valve hole in the rim, so a 6.0mm Presta valve is required.
Presta works best on HP tires. A 26" MTB tire is half the pressure. A schrader is not only adequate, it's standard with peripheral gear already in place at gas stations etc...
I'm happy that the rim conversion is only the cost of a drill bit.
I hate presta!
For high pressure tires and road bikes with skinny tires, Presta is the Besta!
Schrader valves actually hold higher pressures better than presta. That's why they use them on suspension components. With a lot of people going back to wider rims, maybe it's time that they just drilled larger holes so people have the option of running Schrader.
I have a Shrader on back, a Presta in front. The Presta has been a pain in my butt for a long time - thanks for the bit size info.
I have no idea who thought a presta valve would be a great invention!
@@mahmoudsayed6502 I agree
Thanks for your video - 8mm drill bit and a round file worked fine...cheers
Thanks for the how to, I'm old school and prefer the schrader valves when using the thorn resistance tubes.
All of your videos are very informative and clear! Thanks for having this channel.
I have only one suggestion on this wise conversion. When drilling out the valve hole, step the bits instead of drilling the hole out to the correct size with one pass. That will prevent any elongation of the hole, and allow 2 wall rims to self guide the bit
Didn’t have a drill so I used a pair of scissors and kept scraping off metal from the smaller hole until it fit took like a hour
Nice podcast, thank you! Back in the late 1960s, I had a nice hand pump with a Campy Presta head. Great for my Schwinn high speed clinchers. They were the bomb! Now this current Presta Valve horror---no way could I get my Presta pump to even air up my new tires. I was shocked. Then dug out my old Campy with Presta. I had no idea there was this huge movement away from Presta into the arms of Schraeder. Schraeder valves are bonehead-proof!
I modified my 95 jamis mountain bike and I love the way it rides and looks. I purchased 2 extended valve tubes American for $7dollars on the internet. It could be my imagination but it feels more solid and rugged. Do it to any bike with a presta valve. God bless the U.S.A.
Love it. I have an old 1910 Danish bike with a rotted rim. The only good replacement for 28" x 1 1/2 rims is a modern velocity 29 blunt 35 rim, that only comes with a Presta valve hole. I want to keep the bike original (a Schrader) so this video made clear to me it can be done. Drill bit size info was a big help. Thank you!
A little tip, if you drill from the spoke side instead of the tube side of the rim you won't damage the paint work as much on the rim. Although this might be trickier to drill, will give you a better finish
Something else to try is to put masking tape on the side opposite of the drill. Works when drilling/cutting wood; might work for finished metal too. I haven't tried it on a rim though.
Your video answered the question I asked myself 😉 many thanks
Thanks so much for posting this video. I just drilled my rim out successfully. My drill bit kit didn't have a 21/64 but it did have a 5/16. The 21/64 works out to 0.328125. A 5/16 bit works out to 0.3125, so they're pretty close - a difference of 0.4 mm. The 5/16 drills a hole about 0.3 mm larger than the Schrader valve stem. So a 21/64 would give a clearance of 0.7mm larger than the Schrader valve stem. Hopefully my 0.3mm clearance is good enough not to cause any problems. I guess I'll find out!
I can't stand Presta. Thinking of converting using a drill. How was it for you?
@@aodh5966 It was pretty straightforward although it freaked me out at first. I just took a normal drillbit, stood over the rim and did it a little bit at a time. It went right through it without any problem and after about five seconds I realized it was not a big deal. Just take it slow at first. You might also want to wear eye protection and watch out for a little bit of shrapnel that can be quite sharp.
@@adamh7947 I have Schrader front wheel now! Thanks a lot for the advice, it worked a treat, got my front tire firmly pumped up using an electric pump! I'll do the rear soon just need another Schrader innertube for the back. Been riding on too soft tires my bike will roll so much better now, huge improvement! Thanks 👍
@@aodh5966 Awesome, it’s such a satisfying feeling to be able to do something like that. Glad yours turned out nicely. Enjoy the riding and hope you get good weather for it.
It equals 8.33mm. Perhaps an 8mm bit with a little bit of filing will work.
I just did this, thanks for the vid. I didn't have a 21/64 but I did have a 5/16. Brand new bit made a perfectly smooth bore. I thought, why am I going to a specialty shop 20 miles each way for these presta valves on a 26" rim? My motorcycle take 45 PSI. My ruck is 70 psi when using a 5th wheel. Never have issues with schrader valves.
To anyone following along at home and wanting to go tubeless schrader I've found making the hole on the tube size a little bigger 11mm or so really helps seat the valve especially if you are DIY using conti valves off old inner tubes.
No you are wrong. A Schrader valves diameter is 8mm, not 11. That would be way too big and would make the rim trash.
While we're all bashing Presta let me add my 2 cents... I have an electric pump that fits both, when I screw it onto a Schrader valve, the digital display tells me the tyre pressure, but it doesn't if I screw it on the Presta valve and this is another reason I hate them.
I use an adapter for my Schrader electric pump and today I learned that you actually have to screw the adapter onto the presta valve first and then push the pump onto the adapter. Fun.
Estupenda explicación sobre las válvulas, pero no acabo de entender que vamos todos hacia unificar por ejemplo a USB C y, en cambio, volvemos a una válvula del siglo anterior, salvo por peculiaridades de una llanta de carretera donde no hay otra opción.
Hablamos de Schrader (1.500 millones de vehículos) 1 mm de diferencia, no es objeto de rotura de llanta, la practicidad universal, no lleva tuerca, aguantan presiones altísimas como en los tractores, tráiler, motos de enduro etc., comprobar la presión es mucho más práctico, se pueden tubelizar, desmontaje del obús súper práctico, inflado menos arriesgado al inflar con mancha en la montaña al no doblar, me cuesta muchísimo entender ir hacia atrás.
De todas formas felicitaciones por el video, sigo mucho tus consejos, eres un gran comentador.
Because of your video I was able to do transition thanks 👍🏽
Great video! Just wondering how narrow of a rim can you do this to, without compromising the strength of it? I'm considering converting to schrader on a 21mm rim. Thanks
One of my Prestas broke this morning before a MTB out ride. Prestas are in my subjective opion too flimsy. I'm going to attempt a Presta to Schrader TUBELESS conversion. Thanks for the tips
Why not drill another larger hole on the other side of the rim to accept the Schrader and still be able to use the narrower presta in the other hole?
Easier to just make the one existing hole larger. Then if you want to go back put a washer over the presta valve
@@acyutanandadas1326 They sell adapters to convert from schrader to presta.
@@gardenman3 Thanks. I have those adapters. What I found are rubber 'washers' that fill in schrader type rim holes so presta tubes can be used.
The presta valve core is fairly easy to remove so you can put slime in the tube. There are two threaded sections of the presta valve. The topmost small section is the vavle core. Those threads have two flattened sides so that you can unscrew it with either pliers, an adjustable wrench, or better yet, a wrench of the correct size. Easy peasy. Slime goes in no problem.
I still have no idea who thought a presta valve would be a great invention!
@@mahmoudsayed6502 Democrats.😁 I'm 60 and never used persta until my brother, who is into off road biking, gave me a bike with Presta. Brand new tube won't hold air more than several hours. WTF. Never had the problem with Schrader.
a shrader is arguably easier to take out and has a bigger hole for the sealant to flow in. Plus presta valves get gummy after they get slime on them and weep.
Not all presta valve stems have removeable valve cores. Tubeless presta valves always have them, but only some presta tubes.
Very good demonstration.
thank you!! I bought a new bike 2 years ago, and rode it 15 miles. The next spring I went to ride it and the tires were flat. That was a year ago and I still can't put air in it.
I hate presta valve, its pain and mess to pump the green slime in presta tube, i converted my presta wheel to schrader, i wonder why there is presta valve when schrader valve works on skinny rims?
21/64ths eh? That's what I needed to know, thanks. Thumb up for the info.
11/32" not 21/64" 8.5mm is too small, 9mm is too big. 11/32" is 8.731mm, and just right.
Thank you, answered my question and then gave me the size bitI needed.
I'd use a 5/16th, and then a Dremel stone to smooth the edges. I am planning on doing this, but was a little concerned about the effect on rim strength. The sides of the rim and spokes have the strength of the wheel though, not the area where the valve is. Presta is garbage.
The other HUGE advantage of the Schrader valve is that it's easy to put Slime (or some other sealant) into the tube. I haven't had a ride spoilt by a puncture in over 8 years!
I think the biggest advantage presta has is that it locks in the upright position with the nut. I had a tire that the Schrader valve kept going catawhompus on me and eventually the rim cut into it trashing the core. Valve preference is a highly debatable topic however. Toe-matoh vs To-mato
Get Schwalbe inner tubes, their Schrader tubes have a thread on.
Great video . My bmx came with presta rims fixing to do this to my rims thanks
Any concerns about weakening the rim?
how is the wheel performing? it is not bending in any way?
Good job man! You've got excellent video skills.
I don't see that a nut fits down over the valve stem to hold the stem & tube in place. Isn't that a requirement?
quick question....what are the chance the integrity of the rim might be effected by this process?
Since the larger hole is no bigger than a spoke hole, likely no effect on the integrity.
It does affect integrity. It's not worth it.
Did this to my hybrid bike a week into owning it. Fast forward 3 years forward and nothing is wrong. I need to go get my wheels set to true but that's apart of basic maintenance of the bike, like cleaning the chain.
Could you drill a large hole on the other side of the rim to accept the Schrader and keep the smaller hole to take the Presta valve?
No because it will effect the strength of the wheel (the other side of the rim is where it joins)
Thanks very much... this worked great for me
Can i put a presta valve on my schrader rim?
Yes
my schtrader inners all have long stems and retaining nuts just like that presta.
Thank you for sharing!😉
Thank you, positively practical.
Remove the inner valve to a presta valve and squirt sealant via a rubber hose that comes with Orange seal.
3/8 bit works fine too
0:04 i dont have this tool😄,will i do it with other things?
Yes presta tubes are a pain.schrader is so much easier.
I have been donated some presta valve inner tubes but I currently use schrader valves and noticed the slight difference in valve diameter, would it still be ok to use these thinner presta valves in my bigger schrader valve holes? thanks in advance
I'm soooooooo done with presta, presta was such a bad idea.
Slime can be put into a tube with a presta valve, you just remove the valve core like a shearer , a chain breaker tool can actually be used as a removal tool for presta, if you have a cheaper presta valve inner tube you probably find it’s none removable
what makes you think you cant do the same with a shrader, shrader even has a bigger diam valve for the slime to flow in etc.
@@driftke70 no one is saying you can’t, just pointing out it can be done with presta valves if removable and if so it’s actually easier as no special tool is required
@@insoft_uk presta literally needs a special tool, they both do, both can be built into the cap.
I agree
Incase you want to put a presta valve tube again, can that be done?
Sarmad Qureshi Yes it can be done. You just need a grommet for presta to schrader. Check Amazon or just google it.
just drill another hole on the rim that fits presta
@@joshuahuang07 Lol man, best comment! XD
Yes those presta valves suck. Just walked my bike home. The adapter I had worked poorly, and who knows if the presta might have been broken or what, but I will drill that sucker like my others.
Presta leaks air when you open it, leaks when you put the chuck on, leaks when you take the chuck off and leaks when you close it and leaks if you forget to close it.
Presta is designed to leak. Schrader is designed to hold air.
My new bike has presta. It drives me knuts.
I have a presta chuck on my Zéfal pump, it works poorly, bought a SKS chuck, it works poorly, I have a presta gauge from my road biking days, it works poorly.
3 seconds to open, 3 to close x2 wheels is 12 seconds. Check air 1x week = 50 second a month, ride 10 months is 500 seconds a year = 8minutes.
If you ride alot your life would 1 hour longer in 10 or 12 years not didling w presta.
I must have drilled at least 3 sets of MTB rims for Schrader in the 90s. 21/64" thank you!
How do you use the schrader gauge with the presta adapter. The schrader gauge pin cannot reach to press in the presta pin.
You have to unscrew the presta valve just like you do now. Than put on the schrader adapter
@@gardenman3 and how do u engage the presta valve.
@@sweetsuductress You cannot be real accurate. The force of the air opens the presta valve. You cannot use a schrader pressure gauge. You have to put the air in by feel.
I can't stand the presta valves go flat within a week riding or no riding, I get that the really narrow rims may need them, otherwise most ridiculous invention ever, well except maybe the pet rock beats it!
And the other way around?
Lol
Just started my first mtb build and bought narrow valves where the wheel has a wide hole.
Im feeling so stupid right now
Is it possible to use a Presta tube on a traditional Schrader bike rim? Thanks!
Yes but not recommended
yes. its fine. get the presta saver bushings they're rubber and cheap.
@@jom3767 by who? and why? WTF would anyone drill out for a shitty Schrader valve in the first place.
@@andrewselkirk2688 did you read his question? Obviously if you plan to use a presta tube on a schrader rim no drilling is needed. If you want to use a schrader tube on a presta rim then you have to drill because presta rims has smaller hole.
Jo M thanks tips. I was replying to your nonsense about not using a presta in a schrader rim.
I don’t recommend doing it to narrow rims . But I’m doing it if the rim allows it to be done , so lame presta .
Can you do this to a car aluminum alloy rims? Mine came with a skinny valve and I would like to have it standard size.
I'm not sure what rim and valve your referring to. I would go to a tire store like Firestone or Goodyear and show them your wheel. They can tell you what your options are.
what is a 21/64 size drill bit? in metric?
Roughly 8 mm
@@LorenzoC1980 It's closer to 8.5mm, but that's still too small for the UK inner tubes I've tried. Better to go up to 11/32" or 9mm if you can't get hold of that.
@@NikBlackwell Agree with you, here in south america i have a rim with a dunlop valve hole, which is supposed to be 8mm, but I can't Fit a car valve inner tube, so i would go 8.5mm+ (9mm) Thanks for the comment! I now know what drill bit to buy.
clearly has no idea that the valve core IS REMOVABLE on the presta valve, then slime is no problem.
i feel like I grew up in an alternate universe in America, I hate the presta valve, Im joe blow, I just want to ride my bike. stop at the gas station to fill the tires in an emergency , or w/ air compressor at my house. so annoying. more difficult than needs to be. messing around with the pump, its so dumb, so froggy
BUT WHY??? Presta is just superior in every way. Most cheap bikes come with shrader. Every HIGH END bike has presta valves. I would never do this to my bike personally.
You drink the Kool-Aid? I just did this modification on DT-Swiss wheels on a Cannondale and what a huge improvement it has been.
@@voodoorobMesaArizona do you.
Hell, Schrader is better in every way, my motorcycles dont run Presta, for instance.
I bought a replacement Tyre & tube at a giant big box store.
When I got home and realized it had a Presta valve (I had never herd of one before)
I was able to blow it up enough with lung air to install it.
Then came trying to find a place to air it up.
No dice on a Sunday round here!
Went back and bought a new foot pump with both types.
Seems odd the tube is a common sized mountain bike.
It's in there, and is working for now.
I'll ride it till it blows.
Went and bought a "normal" tube for next time.
The tube with the new fangled presta valve was a heavy duty wide tube, hopefully it will hold up in the bigger hole for a while @ 60 psi