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Old 01-24-09, 09:18 PM   #1
CafeRacer
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Gear Inch Calculator

I need a gear inch calculater that also tells me speed for a specific RPM. The one on fixedgearfever.com works awesome but doesnt go high enough. There used to be a really good one online but I cant find it.

Cheers.
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Old 01-24-09, 11:43 PM   #2
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look at the barenuckle applet on the fixed gear forum. It's on one of the stickies I believe
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Old 01-25-09, 12:16 AM   #3
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http://software.bareknucklebrigade.c...it.applet.html
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Old 01-25-09, 01:29 PM   #4
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Thats a pretty cool program but it doesnt go high enough. I need somthing that goes up past 200 RPM
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Old 01-25-09, 01:57 PM   #5
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Quote:
Originally Posted by CafeRacer View Post
Thats a pretty cool program but it doesnt go high enough. I need somthing that goes up past 200 RPM
Since the RPM:speed ratio is constant you can just figure out the speed change that 10rpm creates, and then do the addition.

For example, I plugged in 50x15, 167.5 cranks, and 700cx23. I observe that for every 10rpm the speed increases 2.6 mph. Though 160 rpm is the max (and gives me 41.7 mph), I can calculate that at 210 rpm, my speed will be 41.7 + (5 X 2.6) = 54.7.

Inconvenient if you want to look at several different gear combinations or whatever, but all the data is there.
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Old 01-26-09, 10:57 AM   #6
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Thats a pretty cool program but it doesnt go high enough. I need somthing that goes up past 200 RPM
How high should it go? Let me know and I'll adjust it for you... You must have hamster legs!
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Old 01-26-09, 03:20 PM   #7
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Tyr this one: http://www.jbarrm.com/cycal/cycal.html
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Old 01-26-09, 11:38 PM   #8
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How high should it go? Let me know and I'll adjust it for you... You must have hamster legs!
Ok, I bumped up the top rpm in Rabbit to 240. I figure that's more than adequate... If any one has requests for Rabbit PM me.
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Old 01-27-09, 06:28 AM   #9
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Is it really possible to hit 240 or even 210 rpm?
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Old 01-28-09, 12:47 PM   #10
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If your a sprinter 210 is fairly attainable on rollers or on the track behind a motor. Coming off a big hill you can train the legs to go even faster.

The upgrades to the Rabbit work perfectly, Thanks a bunch for making my post training session math work easier!
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