700cx32
175mm
32tx20t
freewheel
edit:
court size: 120' x 54'
Doing Some Math
I've been interested in doing a bit a of statistical analysis on what people ride on. Since polo bikes are so diverse, I'm thinking about using the Gain Ratio calculation as an overall metric.
http://sheldonbrown.com/gain.html
I'm making a Google doc spreadsheet, so if you'd like to contribute to it, email me: alias(dot)s(dot)tagami(at)gmail(dot)com and I'll send you an invite to contribute. Or simply post the following here in the thread, and I'll add it myself.
-Wheel size
-Tire size
-Crank length
-Chain-ring # of teeth
-Rear cog #of teeth
-Freewheel or Fixed
After I have a large enough sample, I'll post the results. I'm sure others have done this before, but I kind of like being able to play with the data myself.
A
R
Thanks!
Thanks for the numbers!
I'm going to poll my club on Thursday. I also plan to track region. We play on a really small court in DC. I wonder ho much that plays into the engineering choices? I'll try to post the updated stats as I get a larger sample.
A
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T
700x40c
165mm cranks
25x17
fixed
*edited to add court dimensions: 45'x115'
700x35
170mm
35x22
freewheel
I've also been paging through the bike section here on LoBP and entering any bikes that have all the desired dimensions. 14 entries so far. I'll post first results once I've got to 50 bikes. That's still a small sample, but it's a good start.
A
R
Thanks for the help so far and keep the numbers coming!
26" x 1.75
175mm
32T x 20T
Freewheel
26"
2.35
165mm
35
21
free
26"
1.95"
155mm
34
23
free
700c
35
175mm
36
22
free
...it might be hard to capture this reliably, but court size dictates these numbers to a large extent. i would imagine you would find a correlation there.
I believe you're correct. I've been noting what club a person has listed by their profile. I'll present any local correlations that I can when I get enough data.
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26"
1.5
160mm
34
20
Freewheel
700x45
170mm
32x19
fixed
front brake... oh wait, you didn't ask for that one.
700X23
170mm
35X22
Free
21 entries so far. For fun...
The "mode" build:
700c wheel
32c tire
170mm crank
32T chainring
22T freewheel
Gear Ratio: 1.45 (-10.08% compared to mean)
Gain Ratio: 2.77 (-13.29% compared to mean)
Keep the number coming!
A
R
Thanks to everyone so far
I just want to say that this isn't math. This is statistics. So there.
26
1.75
165mm
35
21
freewheeeeeel
26
2.4 (thank you jason f-off)
170mm
35
22
freewheezy
700c
35c
170mm
32front
20back
freewheel
This thread should be called "doing some meth". i'll add to my LOBP todo list a table view of the 400+ bikes on this site, which might save you some time. don't count on this anytime too soon tho.
Uh, make that 600 bikes...
i'll add tire size as a field soon.
That would be awesome. Tires, wheels, and cranks would be awesome. A boy can dream. In the mean time, I thumb through the bikes section and try to find posts that have the needed info.
If it's ~600 bikes right now, I should probably get about 60 bikes instead of 50 so I have a 10% sample. Granted, the more the better.
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700c
28c
165mm
35t
22t
freewheelin
good on long and short court
26 x 2.10
165
24 x 16
freewheel
700 x 35
170
34/22
freewheel
Our current court is, from what I can tell from google maps, about 150' x 65' (46m x 20m).
700x32
170
25
27-16
fixed
Just so I got this right...
you ride one of two setups:
25/27 and 25/16?
I'll make entries for both if this is correct.
26x1.95
170mm
36-20
freewheel
700c
32c
170mm
34t
20t
free
622
front: 28c
rear: 23c
170mm
38t
22t
free
Thanks for the entries!
700x32c Wheel and tire
170 mm cranks
28 to 18 ratio freewheel.
47-559 (26"x1,75)
165mm
35:22
freewheel
home court: 20x40m
26 x 1.5
170mm
36, 22
free
New bike will be completed on the weekend...
Running:
700c
35mm
36 x 20
Freeweelin!
Oh and wouldn't have a clue of our court size. Brisbane doesn't measure its size.
26x2.25
175mm
36 x 19
freewheel
700x35c Switching to 38c maybe
170mm
36t x 19t
Fixed
2 1/2" Penis
Oops!
Crank length is 160mm
Front wheel is 26" 2.6
700x35
165mm
32x22 freewheel
I'm with stupid ^
700x35
165
25x16 freebird
26x1.5
165mm
32x18
freewheel
extra:
dual v-brakes w/ st.cago lever
1992 cro-mo khs mtb frame (orig. owner)
New squarebuilt bike
700x32
165
30x18
Free
Old MKE Bruiser
700x32
170
32x18
Free
26x2.0
165mm
28x18
Freewheelin cassette for swift gear change... A stack of cogs + tool = 1 freewheel in weight...
26"
1.75"
170mm
32
22
Freewheel
Thanks for all the replies. This along with other entries emailed to me, I have some numbers. I'll continue to accept entries, and let the spreadsheet grow. Note: I didn't have any entries by people who play fixed on 26in wheels.
The Average Gain Ratio: 3.33
Here are the mode builds. I did one for each type of wheel.
Free - 26in x 1.5in wheels/tires - 170mm cranks - 35:20 (1.8) gear ratio - 3.43 gain ratio (+0.08% over the average)
Free - 700c x 32c wheels/tires - 170mm cranks - 32:22 (1.59) gear ratio) - 3.42 gain ratio (+0.03% over the average)
For a split second, I thought the topic of this thread was "Doing Some Meth".
Helpful thread...I building up and needed some good comparisons.
26"
2.0"
170mm
32t
(DosENO) 17/19
Free
and for my grass bike:
26"
2.1"
175mm
36t
20t
Free