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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 10-24-10, 02:41 PM   #1
gt35built
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Help with picking chainring. Stuck between 47 48 and 49

So Im building another bike. I don't want to say I'm am going to pick my chainring around my cog, but that is partly true. Phil cogs aren't cheap, and I already have a 16t. With the three chainring options listed, what would you choose for a brake-less street bike? I compared the gear inches with different cogs since I will eventually want to have two options, one for a little more hilly areas and one for a higher cruising speed on flat lands.

Its 47 48 49 across and 15 16 17 down

82.3 84.1 85.8
77.2 78.8 80.5
72.7 74.2 75.7

47 48 49 across 16 17 18 down

77.2 78.8 80.5
72.7 74.2 75.7
68.6 70.1 71.5

Im currently good on flat land, running a 46/16 combo, which is 76.9 inches on a 28c tire. the above was for a 23.

What do you think I should go with?
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Old 10-24-10, 02:48 PM   #2
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i'd go 49t 16/17/18

I've ridden 80+ Gi on the street and don't see any point to doing it again.
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Old 10-24-10, 02:48 PM   #3
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heres some advice.
-a chainring would cost about the same as your phil cog, unless you are going for bling with a zen chainring or something
-your difference will be minimal with a 23 versus a 28
-forget phil cogs, any reg. dura ace/eai/soma will work. honestly.
-get a brake


last gripe, instead of making two charts with 15,16,17 maybe make just one with 15,16,17,18
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Old 10-24-10, 02:50 PM   #4
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49/16

/thread
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Old 10-24-10, 02:53 PM   #5
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+1 for what killem have said.
I'd go with 47...47/18 is my preferred ratio...almost identical to my current 44/17.

I don't know you're asking as for advice though, we don't even ride our bikes.
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Old 10-24-10, 02:57 PM   #6
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Quote:
Originally Posted by xkillemallx16 View Post
heres some advice.
-a chainring would cost about the same as your phil cog, unless you are going for bling with a zen chainring or something
-your difference will be minimal with a 23 versus a 28
-forget phil cogs, any reg. dura ace/eai/soma will work. honestly.
-get a brake


last gripe, instead of making two charts with 15,16,17 maybe make just one with 15,16,17,18
miche advanced chainrings run slightly cheaper than a phil cog.
just noted that the charts where made with different tire sizes.
I have dura ace cogs I guess I could use
non-machined rims
sorry for the two seperate charts.

Next time actually give me some help with what I'm asking
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Old 10-24-10, 03:01 PM   #7
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We don't know how strong you are or how fast you can spin, we don't know the terrain you usually ride on, that's why gear ratio advices are usually useless because everyone have their own preferrences.

Why not just stick with your current ratio on your T1 or Pasado, and buy a small cog like 13 or 14?
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Old 10-24-10, 03:04 PM   #8
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Because you are being obnoxious I am going to reply to your thread with no relevant input.
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Old 10-24-10, 03:07 PM   #9
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6' 2 185 and I said its mostly flatland but would like something that would be easier for hilly sections.

New bike. new wheelset/cog. new crank, which is only available in 47 48 49.
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Old 10-24-10, 03:30 PM   #10
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you are such a great member of this community.
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Old 10-24-10, 03:43 PM   #11
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you too cutie
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Old 10-24-10, 03:44 PM   #12
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http://www.probikekit.com/display.php?code=A9908
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Old 10-24-10, 03:54 PM   #13
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Its going for 130 on ribble. thats where I planned on buying it, and its cheaper than getting it though the shop.
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Old 10-24-10, 03:54 PM   #14
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we laaaav you
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Old 10-24-10, 04:11 PM   #15
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get a 47 if youre one of those brakeless fools.
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Old 10-24-10, 04:13 PM   #16
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I don't know you're asking as for advice though, we don't even ride our bikes.
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Old 10-24-10, 04:33 PM   #17
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Old 10-24-10, 04:57 PM   #18
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I run 47x17 and love it for everything but super windy days. That being said I used to use 48x17, 49x17 and 49x16. I'm actually faster now than I was when I used 49x16 because I had to work on my spin more. working on improving a higher cruising cadence > running higher gear inches
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Old 10-24-10, 04:57 PM   #19
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carleton, I want to be like you when I up.
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Old 10-24-10, 05:17 PM   #20
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47
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Old 10-25-10, 11:19 PM   #21
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http://software.bareknucklebrigade.c...it.applet.html

Run those numbers and look at the skid patches. Run a 18x16 so we can all LOL.
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Old 10-26-10, 01:34 AM   #22
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this thread is pointless(:>
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Old 10-26-10, 02:09 AM   #23
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Quote:
Originally Posted by gt35built View Post

Next time actually give me some help with what I'm asking
And you wonder why people around here dont like you.

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Old 10-26-10, 08:14 AM   #24
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this thread is pointless(:>
Your post was pointless. Go make better use of your <19 posts.

Quote:
Originally Posted by Deshi View Post
And you wonder why people around here dont like you.

This thread was going to sink, but you too morons had to keep it going. This thread already delivered, so lets move on with the next one.

I dont understand the reason for yall being on a bike forum if you dont even post about anything related to bikes. Are your lives really that boring that you need to spend your time on an internet forum posting usless things?
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Old 10-26-10, 08:23 AM   #25
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Are your lives really that boring that you need to spend your time on an internet forum posting usless things?
Yours is boring enough to not only look at them but also complain about them.
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