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#1
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Presta to Schrader
I'd like to convert my rims to accept Schrader valves (the tubes are
cheaper and more reliable) Has anyone done this?Would a standard file work or is a needle file advisable? Also I was going to use 27x1 1/4 tubes on 700x25 rims would this work? Thanks |
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#2
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Presta to Schrader
On Thu, 4 Sep 2008 09:24:20 -0700 (PDT), Mister2u wrote:
I'd like to convert my rims to accept Schrader valves (the tubes are cheaper and more reliable) Has anyone done this?Would a standard file work or is a needle file advisable? Also I was going to use 27x1 1/4 tubes on 700x25 rims would this work? Thanks Yes, yes, no, yes. A tapered reamer will do the job more easily; a needle file would (for someone who would ask such questions in the first place) require perhaps more skill than you may have. Your estimation of reliability is arguable. |
#3
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Presta to Schrader
On Sep 4, 9:24*am, Mister2u wrote:
I'd like to convert my rims to accept Schrader valves (the tubes are cheaper and more reliable) Has anyone done this?Would a standard file work or is a needle file advisable? Also I was going to use 27x1 1/4 tubes on 700x25 rims would this work? Thanks I've gotten tired of dealing with flimsy Presta valves and switched over to Schrader. I used a drill to enlarge the hole, and then a small file to remove any burs. It only took a couple minutes to accomplish the task. Just be careful to choose the correct size bit. AFA the tube goes, you will probably have a difficult time getting that large tube into a 25 tire. I'd go with 1" tubes. --Brian |
#4
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Presta to Schrader
On Sep 4, 9:24*am, Mister2u wrote:
I'd like to convert my rims to accept Schrader valves (the tubes are cheaper and more reliable) I would dispute both of these premises. More available from Wal-Mart, certainly. But not cheaper. And more reliable only in the sense of a more reliable supply of compressed air. Has anyone done this?Would a standard file work or is a needle file advisable? Most people use a 21/64" drill bit. If it's a narrow rim (say, 20mm external) I wouldn't recommend it. If it's 22 or so, you should be fine. Also I was going to use 27x1 1/4 tubes on 700x25 rims would this work? 700c and 27" use the same tubes. Thanks Good luck! |
#5
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Presta to Schrader
On Sep 4, 12:15*pm, _
wrote: On Thu, 4 Sep 2008 09:24:20 -0700 (PDT), Mister2u wrote: I'd like to convert my rims to accept Schrader valves (the tubes are cheaper and more reliable) Has anyone done this?Would a standard file work or is a needle file advisable? Also I was going to use 27x1 1/4 tubes on 700x25 rims would this work? Thanks Yes, yes, no, yes. A tapered reamer will do the job more easily; a needle file would (for someone who would ask such questions in the first place) require perhaps more skill than you may have. Your estimation of reliability is arguable. Not arguable at all. Schrader valves are far more reliable than presta, as the presta interface with the tube is especially vulnerable--not the design of the valve itself, which is fine. If a rim is wide enough, like on my Alex DM18s I like on utility/tour/city bikes--I prefer schrader for rock solid reliability. I also run the largest tube that will fit, often a step up from what the tire states, so there's no stretch to the tube as it inflates, for more belts and suspenders. I even keep a vintage cap on the front of my daily rider with a valve core tool, so that if I'm out riding and my valve goes leaky--I can just pop a new one in without pulling the tube. |
#6
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Presta to Schrader
someone wrote:
I'd like to convert my rims to accept Schrader valves (the tubes are cheaper and more reliable). Has anyone done this? Would a standard file work or is a needle file advisable? Also I was going to use 27x1 1/4 tubes on 700x25 rims would this work? I've been riding Presta valves for more years than most wreck.bike readers can imagine and never had a failure other than stem separations during the year when they were manufacturing defects. The reason for using Presta valves is that they make a smaller hole in the rim (the weak spot) and are easy to pump. On that note, I notice a lot of CO2 cartridges lying along roads, so pumping seems no longer popular in this affluent time. Whether that size tube will fit your tires depends on how undersized they are. 1-1/4" = 31.75mm, the same goes for Presta tubes, but they are not that large, but rather, they are intended to go into tires up to that size with a bit of stretch. Experiment with them to find the largest tube that will fir your tires without wrinkles. If you need to ask on how to enlarge the hole, get some help. Jobst Brandt |
#7
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Presta to Schrader
On Sep 4, 12:56*pm, wrote:
If you need to ask on how to enlarge the hole, get some help. Jobst Brandt is that psychological, or technical ? |
#8
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Presta to Schrader
On Sep 4, 1:56 pm, wrote:
On that note, I notice a lot of CO2 cartridges lying along roads, so pumping seems no longer popular in this affluent time. -- Jobst Brandt This report amazes. Do good places to ride so much resemble shooting galleries and back-alley brothels, littered with used needles and condoms? Lots of CO2 cartridges? Has this thing for super-thin and flat-vulnerable lightweight tires gone too far? incredulous |
#9
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Presta to Schrader
On Sep 4, 6:30*pm, "
wrote: On Sep 4, 1:56 pm, wrote: *On that note, I notice a lot of CO2 cartridges lying along roads, so pumping seems no longer *popular in this affluent time. * *-- * Jobst Brandt This report amazes. Do good places to ride so much resemble shooting galleries and back-alley brothels, littered with used needles and condoms? Lots of CO2 cartridges? Has this thing for super-thin and flat-vulnerable lightweight tires gone too far? incredulous it shouldn't be a problem to pick up your trash/ leave no trace |
#10
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Presta to Schrader
wrote:
I've been riding Presta valves for more years than most wreck.bike readers can imagine and never had a failure other than stem separations during the year when they were manufacturing defects. I have broken off a small number of Presta stems while inflating tires with a simple frame pump. That's never happened to me with a Schrader valve, nor with any kind of pump that connects by way of a hose. I have also observed quite a few bent and broken center bolts on Presta valves, and Schrader valves are immune to this. Schrader valves are simply better, which is why they are used on many different kinds of equipment. That said, most of my 26" and 700c wheeled bikes have Presta-drilled rims which I tolerate for the sake of rim strength. Chalo |
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