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Rim drilled for schrader ... using presta tube

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Rim drilled for schrader ... using presta tube

Old 07-22-17, 05:44 PM
  #26  
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Originally Posted by axolotl
There should be no need for you to mess around with tape or grommets.
Except they are the type of thing that stores often sell for much more than their cost to them. I pay the cost sometimes and sometimes I don't. I once wanted some Pant Leg Cuff Clips but the salesman was busy so I went to Staples and got a bag of rubber bands. The bag of rubber bands will last many years.
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Old 07-23-17, 01:16 AM
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Any adapter that goes into the rim from the hubside face will do next to nothing.
Anyone who thinks that, keep in mind that the pressure is trying to push the tube and valve OUT.
It'll prevent some water and dirt from entering the rim through the gap around the valve stem, but that's about it.
Forcing the valve stem to stay upright by the fit through the rim does not improve things. A stem will detach just as easily when pulled at a straight angle as when pulled canted.
Low pressure can indeed cause a tire to "creep" on the rim.
And this can definitely tear valve stems.
Some tire/rim combos are more prone than others.
I had some folding MTB tires where I eventually ended up coating the beads with liquisole to increase friction.
While there may well be double-walled rims with an unusually large hole in the
outside wall, I've used Presta valves in Schräder-drilled rims for decades w/o doing anything else than poking a tight hole for the valve in the rim strip.
Poor inflation technique can tear hub stems.
I have no firm opinion as to whether wiggling or simply pulling does the most damage.
From what I've witnessed, pumping-inducerad stem failure can happen regardless of valve drilling.
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Old 07-23-17, 05:38 AM
  #28  
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Originally Posted by Tourist in MSN
I however recommend that you get the little bushing that goes into the rim before you put the tube in. There are a couple manufacturers, I use these.
Presta | Stem | Savers | Bicycle
You should be able to call around to find a bike shop that carries these or similar products.

I personally prefer Presta tubes, some prefer Schrader. If you think you prefer Schrader instead of Presta, instead of buying the adapter you might want to just change your tube to Schrader and buy a few spare tubes with that valve.
I concur.

I routinely pick up old non-suspended mtbs and convert them to commuters/tourers. The wheels mfg inserts fully-guarantee that there will be no issues. In addition to using the inside adapter, I also like to use the Panaracer schrader-valve and presta-valve nut that fits on a presta valve stem. The nut has a chamfer that mates with the schrader rim hole, giving a very solid setup. The stem doesn't wobble. Very important for longevity.

https://www.amazon.com/gp/product/B0...A2RNBXAVQ4OOHG

It comes out to a few bucks per wheel, but the peace-of-mind I get, not to mention the thoroughness of my builds, is priceless.

Continental does make tubes with nicely-threaded Schrader stems, but most people want Presta now from my experience, and the better pumps are presta-only.
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Old 07-23-17, 06:53 AM
  #29  
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Pressure is trying to push the tube and valve out of any rim hole, adapter or not. I've used adapters in my rims for 17 years without any valve issues. Brake pads eventually wore out the rims and 3 years ago I built 2 new wheels. I popped out the adapters and they're in my new wheels. The thought of using tape or rubber grommets instead of these proven and inexpensive metal adapters seems crazy to me.
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Old 07-23-17, 07:46 AM
  #30  
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Originally Posted by Tourist in MSN
I had a thorn resistant tube (extra thick rubber) and presta valve. The Wheels Manufacturing adapter that I had in the rim might have caused the puncture that I got very close to the presta valve. The tube was quite thick but was very very thin close to the valve stem. I plan to switch to Mavic presta adapters when I change tubes on wheels where I have these adapters installed.
https://www.sjscycles.co.uk/rims-tap...eder-to-presta

I was placing an order with SJS already so I bought several from them, but if you are in USA there probably are cheaper ways to buy these, maybe from a local bike shop?

Wrapping electrical tape around a presta valve would probably produce a very similar result too.
re the link for that adapter thing which is more like a tube shape, thanks for that.

I will ask at my bike store if they have some. I was given a couple of the little ones that fit on from the outside, but these ones look like they would be more robust and that I would trust more if on a long trip (although at that point, Id just use shraeder tubes...but hey)
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Old 07-23-17, 07:53 AM
  #31  
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Originally Posted by NoControl
I concur.

I routinely pick up old non-suspended mtbs and convert them to commuters/tourers. The wheels mfg inserts fully-guarantee that there will be no issues. In addition to using the inside adapter, I also like to use the Panaracer schrader-valve and presta-valve nut that fits on a presta valve stem. The nut has a chamfer that mates with the schrader rim hole, giving a very solid setup. The stem doesn't wobble. Very important for longevity.

https://www.amazon.com/gp/product/B0...A2RNBXAVQ4OOHG

It comes out to a few bucks per wheel, but the peace-of-mind I get, not to mention the thoroughness of my builds, is priceless.

Continental does make tubes with nicely-threaded Schrader stems, but most people want Presta now from my experience, and the better pumps are presta-only.
I was given a couple of these last week and I guess the only thing to keep an eye on is if the adapter comes loose a bit, and could allow the tube to move against the inside of the rim perhaps (maybe more with low pressure tires?)

I do see regular presta valve things like this get loose sometimes, but in any case, these are small and would do the job.
I will see if the other adapters that fit into the rim from the inside are available.
The only reason for my interest is that I saw a really cheap replacement 26in wheel at a store and could use it on myold mtb, but this rim is for shraeder, and all my tubes are presta.

I would also want to have a couple of either of these adapters if I travelled with a shraeder hole rimmed bike, just in case I could only find presta valves. I'd just keep them in a small pill bottle or ziplock with my other little bits of doohickies that I take on trips, they weigh nothing.
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Old 07-23-17, 10:47 PM
  #32  
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Originally Posted by axolotl
Pressure is trying to push the tube and valve out of any rim hole, adapter or not. I've used adapters in my rims for 17 years without any valve issues. Brake pads eventually wore out the rims and 3 years ago I built 2 new wheels. I popped out the adapters and they're in my new wheels. The thought of using tape or rubber grommets instead of these proven and inexpensive metal adapters seems crazy to me.
+1, especially when on a long tour, well any tour for that matter.
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Old 07-24-17, 07:48 AM
  #33  
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I use one of these for a mountain bike where 1 rim was drilled for schrader and the other presta. Fits great, works as it should. High pressure, low pressure, whatever.

https://www.biketiresdirect.com/prod...BoCIOUQAvD_BwE

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Old 07-24-17, 07:55 AM
  #34  
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thanks, another good solid looking one. I will ask about these types when I go into a store in a few days to pick up something I ordered.
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Old 07-24-17, 07:58 AM
  #35  
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Originally Posted by mstateglfr
I use one of these for a mountain bike where 1 rim was drilled for schrader and the other presta. Fits great, works as it should. High pressure, low pressure, whatever.
Make sure they fit your rim if you intend on carrying them for spare use. I have a bike with one of each valve, and carried a spare presta. First time I had to use it on the Schrader wheel, turns out the adapters wouldn't fit in the Schrader hole...
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Old 07-24-17, 08:06 AM
  #36  
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Originally Posted by jefnvk
Make sure they fit your rim if you intend on carrying them for spare use. I have a bike with one of each valve, and carried a spare presta. First time I had to use it on the Schrader wheel, turns out the adapters wouldn't fit in the Schrader hole...
? odd.

I use the adapter right now- both rims effectively run as presta. so i have a spare presta tube then too.
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Old 07-24-17, 08:12 AM
  #37  
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Originally Posted by mstateglfr
? odd.

I use the adapter right now- both rims effectively run as presta. so i have a spare presta tube then too.
Yep, those are the ones I have, but they won't fit through the Schrader hole in that rim. Dunno if the adapters were manufactured just a bit big, or the hole in the rim was drilled a bit too small, but thankfully the fiancee had a spare Schrader tube!

I've got some rubber grommets now, that fit and work fine for spare use.
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Old 07-24-17, 12:25 PM
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Originally Posted by mstateglfr
? odd.

I use the adapter right now- both rims effectively run as presta. so i have a spare presta tube then too.
I have the same adapters, but have not used them yet. I got them to replace some nylon adapters on Mavic rims.
Glad to hear that they work well.
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