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Old 02-27-10, 12:36 AM   #1
no1mad
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Random questions

1) What is the smallest tire/tube with a non-presta valve?

2) When it comes to figuring out FG/SS gearing, any other method than ride my geared bike until I find a combo I can live with?
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Old 02-27-10, 05:56 AM   #2
CNY James
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2) no. well, you can ask the other ss/fixed riders in your area what they find comfortable for riding where you would be riding but that doesnt mean you will like the gearing.
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Old 02-27-10, 08:49 AM   #3
StephenH
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Originally Posted by no1mad View Post
1) What is the smallest tire/tube with a non-presta valve?

2) When it comes to figuring out FG/SS gearing, any other method than ride my geared bike until I find a combo I can live with?
1) Go ask at your local bike store. Specifically, look at what tubes they stock in Schrader. You don't want to be riding something that you can't get tubes for. Don't be surprised if the answer comes up as the old 27" tires or the 26x1-3/8 tires or something odd like that, that you don't really want to use.
2) That sounds like a good method to me. Unless, say, you're riding a mountain bike or other fat-tired bike now, in which case you could maybe go up a bit on gearing with a skinnier-tired lighter bike. Getting other people's ideas helps if those other people are about as equally fit as you.

If you haven't used Presta tubes before, they are pretty easy to work with, at least in my experience- nothing to shy away from. If you could get a 23x700 tube in Schrader valve, I'm not so sure you could get the air chuck off it without losing half the air in the tire.
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Old 02-27-10, 09:32 AM   #4
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I've had Presta tubes before, but it's been ages (early 1990's?). I remember thinking that I could easily damage the valve core if I didn't concentrate. Running 26x1.5's right now, but the next bike will probably be a 700x??.

As for the gearing, I'm just toying with the idea for now. Main issue is that the terrain around work is relatively flat, but the area closer to home is not. Might just look into doing a 1x7/8/9 instead.
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Old 02-27-10, 10:32 AM   #5
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1) What is the smallest tire/tube with a non-presta valve?
Are you referring to diameter or width? Non-presta inner tubes are available for tires down to at least 12" diameter, and normal diameter (e.g. 26"-27") tubes are available for tire widths down to about 18mm.

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2) When it comes to figuring out FG/SS gearing, any other method than ride my geared bike until I find a combo I can live with?
Buy a bunch of cheap fixed cogs to try and when you find the right size replace it with a decent cog? Gearing is very subjective; there's no magic formula to determine what works for you without trying it yourself.

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