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Help With Choosing 700c Inner Tube
On Sun, 1 Apr 2018 17:50:16 -0000 (UTC), Duane wrote:
I see no value in trying to get a presto tube to work in a rim made for a schraeder tube. Seems like just asking for trouble. What kind of trouble would you anticipate? Installing a Presta stem in an oversized hole is certainly a bad idea. A suitable shoulder washer should provide adequate protection. Most of my rims are drilled for Schrader, while most of my tubes have Presta valves. Don't ask why I got myself into this situation. I initially used rubber grommets as adapters (because I had some). However those eventually crumbled or devulcanized from UV or chemical exposure. Another advantage to using an adapter is that I can stock only Presta style tubes, and they will fit both Presta and Schrader drilled rims. No need to stock tubes with both types of valves. Other adapter designs are available: https://www.google.com/search?q=schrader+to+presta+rim+adapter&tbm=isch I used a lathe to make a few that looked something like this: http://wheelsmfg.com/catalogsearch/result/?q=presta+stem+savers -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
Help With Choosing 700c Inner Tube
On Sunday, April 1, 2018 at 7:24:26 AM UTC-7, wrote:
x-posted from rec.bicycles.misc This is the bike in question: https://www.walmart.com/ip/Schwinn-A...-Bike/15711186 The tire size is 28" x 1 5/8" x 1 3/8" (37 - 622) 400 x 35c The flat tube says 700 x 35/43c Available to me at Walmart a Bell Inner Tube Standard 27" Asos fits 700c 28 x 32c Fits tire width 1 1/8 - 1 1/4 ------or Bell inner Tube Presta 700c ROAD ONLY Fits tire width 25 - 32c What do you all think of this as a solution. There has been some concern voiced that the flat tube in the tire now is not exactly the right fit but this solves my Schrader problem and this seems like it matches up better then the one at Walmart. Co-op Cycles Schrader Tube - 700 x 23 - 25 / 28 - 32 / 35 - 43 https://www.rei.com/product/115112/c...25-28-32-35-43 |
Help With Choosing 700c Inner Tube
Jeff Liebermann wrote:
On Sun, 1 Apr 2018 17:50:16 -0000 (UTC), Duane wrote: I see no value in trying to get a presto tube to work in a rim made for a schraeder tube. Seems like just asking for trouble. What kind of trouble would you anticipate? Installing a Presta stem in an oversized hole is certainly a bad idea. A suitable shoulder washer should provide adequate protection. Most of my rims are drilled for Schrader, while most of my tubes have Presta valves. Don't ask why I got myself into this situation. I initially used rubber grommets as adapters (because I had some). However those eventually crumbled or devulcanized from UV or chemical exposure. Another advantage to using an adapter is that I can stock only Presta style tubes, and they will fit both Presta and Schrader drilled rims. No need to stock tubes with both types of valves. Other adapter designs are available: https://www.google.com/search?q=schrader+to+presta+rim+adapter&tbm=isch I used a lathe to make a few that looked something like this: http://wheelsmfg.com/catalogsearch/result/?q=presta+stem+savers Seems simpler to get the right tube. When my kid was living at home stocking shraeders for his bike guaranteed he wouldn’t need to grab my tubes. Didn’t seem like an overly complex solution. -- duane |
Help With Choosing 700c Inner Tube
On 4/1/2018 10:50 AM, Duane wrote:
snip I see no value in trying to get a presto tube to work in a rim made for a schraeder tube. Seems like just asking for trouble. Sometimes there is value. On my road bike I bought a replacement rear wheel and it was drilled for Schaeder but the front wheel is Presta. I would prefer to only carry one tube. |
Help With Choosing 700c Inner Tube
On Sunday, April 1, 2018 at 2:48:15 PM UTC-7, AMuzi wrote:
snip Choose the 700 35~43 SV size. (no comment on brand or quality) When I go to the link I do not see an option to "just" choose the 35~43 SV size which is what it says on the flat tube I removed. Although the pic shows 35/43 the dimensions seem to indicate that one size fits all of these. They are about 10 miles away from me so I am going to call them up tomorrow but what do you think? When you look at the dimensions on the website it does not give me a choice to "just" choose 35/43. Dimensions 700C x 23-25 MM: 700c x 23 - 25mm 700C x 28-32 MM: 700c x 28 - 32mm 700C x 35-43 MM: 700c x 35 - 43mm |
Help With Choosing 700c Inner Tube
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Help With Choosing 700c Inner Tube
On Sun, 01 Apr 2018 10:04:45 -0500, Tim McNamara
wrote: Both of those tubes are are a little too skinny for that width of tire to be ideal. They'll both work with the tire, once you have the valve choice selected, but the tube will be stretched a little thin and more vulnerable to more punctures. One of my tires developed a slow leak that got less and less slow. It manifested when I was at a convention in the hill towns, and I was constrained to live on fruit cups from a snack vendor because I dared not ride my bike into town to buy food. On the way home, I had to stop at decreasing intervals to pump up the tire. When I got the tire off, there was an oval of leaks around the valve stem. My mechanic had assured me that a one-inch tube would stretch to fit an inch-and-a-quarter tire, and it did -- except at the valve stem. There, the tube was loose enough to rub against the tire. -- Joy Beeson joy beeson at comcast dot net http://wlweather.net/PAGEJOY/ |
Help With Choosing 700c Inner Tube
On Sun, 1 Apr 2018 17:50:16 -0000 (UTC), Duane wrote:
wrote: On Sunday, April 1, 2018 at 7:59:56 AM UTC-7, AMuzi wrote: snip Either would work but if you can find a wider (700 35~45) tube it would be better as it will not stretch as thinly to fill your wider tire. At any rate be sure to find the cause and correct the problem before fitting a new tube. Thanks for the response. At any rate be sure to find the cause and correct the problem before fitting a new tube. Flat tube when pumped up was leaking out of a patch : ) I did not see any damage to the tire inside or out where the patch occurred and the rim appeared smooth. The schrader/ presta fix I was referring to is here. Do you have any opinion? TIA. https://www.youtube.com/watch?v=76AQ8RFvCX4&t=127s Going with the concept that the simplest solution is usually the correct one, I would say to buy the type of tire made for the type of rim that you have. In this case a Schraeder valve. Why would you be limited to what is available at Wal-Mart? A local bike shop sounds like your best bet and in addition to finding you a tube, they should be able to answer your questions. I see no value in trying to get a presto tube to work in a rim made for a schraeder tube. Seems like just asking for trouble. I did it, for the same reason that the O.P wants to change from Presta to Schraeder. I didn't have a pump to fit Schraeder valves. What I did was turn up a couple of shouldered washers to fit the larger Schraeder holes although it probably was over kill. A couple of years so far with no problems. -- Cheers, John B. |
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