Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

No Schrader to Presta adaptor

Notices
Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

No Schrader to Presta adaptor

Old 09-24-22, 12:31 PM
  #1  
Milton Keynes
Senior Member
Thread Starter
 
Milton Keynes's Avatar
 
Join Date: May 2016
Posts: 3,889

Bikes: Trek 1100 road bike, Roadmaster gravel/commuter/beater mountain bike

Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 2240 Post(s)
Liked 1,655 Times in 907 Posts
No Schrader to Presta adaptor

The rim on my rear wheel started cracking apart, so I got a new wheel. Unfortunately the new wheel is drilled for Schrader valve stems instead of the Presta stems which I use. I know they make adapters to fit in the holes, but I won't be able to get back to the bike shop for a while. So what I did was screw one of the flat Presta nuts all the way down on the stem before inserting it through the hole, then another one on the outside like normal. Is there any issue in doing this, if even temporarily? I think this is a better solution than not putting anything on the inside part of the stem. I run 90 PSI in my tires so I would be afraid the stems would blow out if I didn't have anything holding them back.
Milton Keynes is offline  
Old 09-24-22, 12:33 PM
  #2  
phughes
Senior Member
 
phughes's Avatar
 
Join Date: Mar 2011
Posts: 2,610
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 819 Post(s)
Liked 926 Times in 531 Posts
Then have them delivered to your door.

https://www.amazon.com/Quad-Wheels-M...-23&th=1&psc=1

Or rubber grommet style: https://www.amazon.com/Pack-Schrader...%3D%3D&sr=8-21
phughes is offline  
Likes For phughes:
Old 09-24-22, 12:40 PM
  #3  
Crankycrank
Senior Member
 
Join Date: Jan 2009
Location: San Diego, CA
Posts: 3,141
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 675 Post(s)
Liked 678 Times in 512 Posts
Originally Posted by Milton Keynes View Post
So what I did was screw one of the flat Presta nuts all the way down on the stem before inserting it through the hole, then another one on the outside like normal. Is there any issue in doing this, if even temporarily? I think this is a better solution than not putting anything on the inside part of the stem. I run 90 PSI in my tires so I would be afraid the stems would blow out if I didn't have anything holding them back.
No issues. They were actually designed with the collar for just this purpose, and you actually only need one on the outside of the rim. As mentioned above you can order Schrader hole adapters for cheap if you like that solution better. I like the rubber ones better as they offer a little more protection against cutting the base of the valve stem.
Crankycrank is offline  
Old 09-24-22, 01:51 PM
  #4  
dmark 
Senior Member
 
Join Date: Oct 2017
Location: NJ
Posts: 517

Bikes: 68 SS, 72 Fuji Finest, 72 PX-10, 77 Pana Pro 7000, 84 Pinnarello Treviso NR, 84 Trek 520, 88 Project KOM, 90 Trek 750, 91 Trek 930

Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 153 Post(s)
Liked 134 Times in 97 Posts
Continental presta tubes have a shoulder on the locknut that sits in a Schrader hole to secure the presta valve.
dmark is offline  
Likes For dmark:
Old 09-24-22, 01:56 PM
  #5  
Troul 
:D
 
Troul's Avatar
 
Join Date: Oct 2013
Location: Mich
Posts: 5,938

Bikes: RSO E-tire dropper fixie brifter

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked 2,067 Times in 1,386 Posts
A short piece of thick heat shrink [marine grade] is what I did for a rim I used in the past. I pre-installed the spare tubes I carried once I found the ideal length needed.
__________________
-Oh Hey!
Troul is offline  
Old 09-24-22, 02:36 PM
  #6  
79pmooney
A Roadie Forever
 
79pmooney's Avatar
 
Join Date: Oct 2014
Location: Portland, OR
Posts: 10,998

Bikes: (2) ti TiCycles, 2007 w/ triple and 2011 fixed, 1979 Peter Mooney, ~1983 Trek 420 now fixed and ~1973 Raleigh Carlton Competition gravel grinder

Mentioned: 115 Post(s)
Tagged: 0 Thread(s)
Quoted: 3692 Post(s)
Liked 2,534 Times in 1,660 Posts
We used to use thin washers bent to the curvature of the rim. That was before the narrow center channels. Now I'd probably do the same, then grind flats on the sides of the washers so they fit in the channel. (I never did this. I was a sewup only guy.)
79pmooney is online now  
Old 09-24-22, 03:11 PM
  #7  
Chuck M 
Butted Hi-Tensile
 
Chuck M's Avatar
 
Join Date: Sep 2020
Location: Oklahoma
Posts: 1,274

Bikes: Hi-Ten bike boomers, a Trek Domane and some projects

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 446 Post(s)
Liked 1,141 Times in 569 Posts
Originally Posted by dmark View Post
Continental presta tubes have a shoulder on the locknut that sits in a Schrader hole to secure the presta valve.
I have had them on some Kenda tubes as well. I save them as I come across them for using on Schrader rims.

Originally Posted by Milton Keynes View Post
The rim on my rear wheel started cracking apart, so I got a new wheel. Unfortunately the new wheel is drilled for Schrader valve stems instead of the Presta stems which I use. I know they make adapters to fit in the holes, but I won't be able to get back to the bike shop for a while. So what I did was screw one of the flat Presta nuts all the way down on the stem before inserting it through the hole, then another one on the outside like normal. Is there any issue in doing this, if even temporarily? I think this is a better solution than not putting anything on the inside part of the stem. I run 90 PSI in my tires so I would be afraid the stems would blow out if I didn't have anything holding them back.
Look around on your other bikes, you may have one of the shouldered nuts on one of them you can use unless you don't use the nuts on your Presta tubes.
__________________
"It is the unknown around the corner that turns my wheels." -- Heinz Stücke

Chuck M is online now  
Old 09-24-22, 05:02 PM
  #8  
andrewclaus
Senior Member
 
Join Date: Feb 2012
Location: Golden, CO and Tucson, AZ
Posts: 2,585

Bikes: 2016 Fuji Tread, 1983 Trek 520

Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 594 Post(s)
Liked 475 Times in 312 Posts
Or don't worry about it. My wife's bike has had Presta tubes in Schrader rims for decades without an issue, with high pressure road tires.
andrewclaus is offline  
Old 09-24-22, 06:04 PM
  #9  
Andrew R Stewart 
Senior Member
 
Andrew R Stewart's Avatar
 
Join Date: Feb 2012
Location: Rochester, NY
Posts: 16,744

Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Srewart 650B ATB

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3628 Post(s)
Liked 2,574 Times in 1,613 Posts
Originally Posted by andrewclaus View Post
Or don't worry about it. My wife's bike has had Presta tubes in Schrader rims for decades without an issue, with high pressure road tires.
This, unless one is really bad at attaching and removing the pump valve chuck on and off the valve. Then the added support of the valve stem might reduce a valve base issue which would be caused by the wagging or twisting that some do when dealing with a pump chuck. But once aired up the PV in a SV hole needs no added support during riding. Andy
__________________
AndrewRStewart
Andrew R Stewart is offline  
Old 09-24-22, 06:16 PM
  #10  
Trakhak
Senior Member
 
Trakhak's Avatar
 
Join Date: Jan 2005
Location: Baltimore, MD
Posts: 3,401
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 1265 Post(s)
Liked 1,220 Times in 711 Posts
Originally Posted by Milton Keynes View Post
So what I did was screw one of the flat Presta nuts all the way down on the stem before inserting it through the hole, then another one on the outside like normal.
Bad idea, if the flat Presta nut prevents the rubber at the bottom of the valve stem from sitting flush on the rim's inner surface. The inflated tube will try to fill that gap, possibly stretching the rubber thin enough to fail.

You can pick up various diameters of rubber grommets for electrical wiring at almost any hardware store. Chances are you can find a size that fits the rim and valve perfectly.
Trakhak is offline  
Old 09-26-22, 06:16 AM
  #11  
cyccommute 
Mad bike riding scientist
 
cyccommute's Avatar
 
Join Date: Nov 2004
Location: Denver, CO
Posts: 25,706

Bikes: Some silver ones, a red one, a black and orange one, and a few titanium ones

Mentioned: 138 Post(s)
Tagged: 1 Thread(s)
Quoted: 5149 Post(s)
Liked 2,694 Times in 1,595 Posts
Originally Posted by phughes View Post

Or, even better, shouldered presta nuts. I find them easier to use than any other grommet.
__________________
Stuart Black
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
Days of Wineless Roads. Bed and Breakfasting along the KATY
Twisting Down the Alley. Misadventures in tornado alley.
cyccommute is offline  
Likes For cyccommute:
Old 09-26-22, 06:41 AM
  #12  
JohnDThompson 
Old fart
 
JohnDThompson's Avatar
 
Join Date: Nov 2004
Location: Appleton WI
Posts: 23,921

Bikes: Several, mostly not name brands.

Mentioned: 145 Post(s)
Tagged: 0 Thread(s)
Quoted: 3118 Post(s)
Liked 2,338 Times in 1,385 Posts
Originally Posted by Chuck M View Post
I have had them on some Kenda tubes as well. I save them as I come across them for using on Schrader rims.

Look around on your other bikes, you may have one of the shouldered nuts on one of them you can use unless you don't use the nuts on your Presta tubes.
This is what to look for:
Attached Images
File Type: jpg
conti-stem-nuts.jpg (640.7 KB, 74 views)
JohnDThompson is offline  
Likes For JohnDThompson:
Old 09-26-22, 07:53 AM
  #13  
pdlamb
Senior Member
 
Join Date: Dec 2010
Location: northern Deep South
Posts: 7,906

Bikes: Fuji Touring, Novara Randonee

Mentioned: 33 Post(s)
Tagged: 0 Thread(s)
Quoted: 2090 Post(s)
Liked 1,336 Times in 847 Posts
Originally Posted by andrewclaus View Post
Or don't worry about it. My wife's bike has had Presta tubes in Schrader rims for decades without an issue, with high pressure road tires.
I've been doing this for years, albeit inadvertently. Wore out a rim, rebuilt the wheel with a new one, and didn't notice the new rim was drilled for Shrader. If I'd noticed, I'd have put on a rubber bushing, or cut a hole in the middle of a 1" square of old inner tube. But it's working fine, so if it ain't broke, why fix it?
pdlamb is offline  
Old 09-26-22, 10:49 AM
  #14  
Troul 
:D
 
Troul's Avatar
 
Join Date: Oct 2013
Location: Mich
Posts: 5,938

Bikes: RSO E-tire dropper fixie brifter

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked 2,067 Times in 1,386 Posts
drill a new port for the presta valve in the rim somewhere else?
__________________
-Oh Hey!
Troul is offline  
Old 09-26-22, 11:06 AM
  #15  
flanso 
Full Member
 
Join Date: May 2008
Location: Tampa
Posts: 295

Bikes: Gunnar Sport 105/UDi2, previous: Lambert, Giant FCR3, Cannondale Synapse Carbon 105, Specialized Roubaix SL4 Comp UDi2

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 24 Post(s)
Likes: 0
Liked 7 Times in 5 Posts
The Continental presta valve tubes that I bought from Amazon came with shouldered presta nuts.
flanso is offline  
Old 09-26-22, 11:07 AM
  #16  
tcs
Palmer
 
tcs's Avatar
 
Join Date: Mar 2007
Location: Parts Unknown
Posts: 7,436

Bikes: Mike Melton custom, 1982 Stumpjumper, Alex Moulton AM, 2010 Dawes Briercliffe, 2017 Dahon Curl i8, 2021 Motobecane Turino 1x12

Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 1166 Post(s)
Liked 881 Times in 546 Posts
Originally Posted by Trakhak View Post
Bad idea, if the flat Presta nut prevents the rubber at the bottom of the valve stem from sitting flush on the rim's inner surface. The inflated tube will try to fill that gap, possibly stretching the rubber thin enough to fail.
Some 40 years ago I had some Wolber tubes where the presta valve was held onto the rubber tube by a screwed-down nut, rather than being vulcanized/bonded onto the rubber. They would work for a bit, but eventually all became self-flatting as the rubber stressed around the nut.
tcs is online now  
Old 09-26-22, 01:56 PM
  #17  
DiabloScott
It's MY mountain
 
DiabloScott's Avatar
 
Join Date: Sep 2006
Location: Mt.Diablo
Posts: 9,651

Bikes: Klein, Merckx, Trek

Mentioned: 66 Post(s)
Tagged: 0 Thread(s)
Quoted: 3666 Post(s)
Liked 2,069 Times in 1,118 Posts
Originally Posted by Milton Keynes View Post
So what I did was screw one of the flat Presta nuts all the way down on the stem before inserting it through the hole, then another one on the outside like normal. Is there any issue in doing this, if even temporarily? I think this is a better solution than not putting anything on the inside part of the stem. I run 90 PSI in my tires so I would be afraid the stems would blow out if I didn't have anything holding them back.
My first option would be to use the presta valve in the Shrader hole with no nuts. Chances are good it'll work fine and last long time.
Second option would be to use a nut or washer. Chances are you don't need it... but depends on rim/tube matchup.
If you don't have a rim-cuts-the-valve problem, the grommet won't solve anything.

I ran this setup for years - no problems except some water inside the rim during the puddle season.


Last edited by DiabloScott; 09-26-22 at 02:00 PM.
DiabloScott is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2022 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.