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Bicycle Gear Head

Bicycle Gear Head
  • #: 195285
  • Price: $2.99 In Apple Store
  • Category: Sports
  • Updated: 2010-07-19
  • Current Version: 2.0
  • 2.0
  • Size: 1.00 MB
  • Language: English
  • Seller: Jason Doty
  • Requirements: Compatible with iPhone, iPod touch, and iPad. Requires iOS 3.1.3 or later
  • © 2010 Jason Doty
  •  Add to Favorite apps



The most comprehensive bicycle gear calculator for the iPhone! Calculate your ENTIRE DRIVETRAIN at once. See results for all chainrings and sprockets at the same time.

Results are updated in REAL TIME, allowing you to quickly find the perfect combination. Both metric and US units!

* New product and we want you to REVIEW IT! Tell us what you want for the next version, and we'll keep updating! *

Generate a beautiful custom results table in seconds that can be shown to customers, sent in an email, or displayed on a web page.


* Wheel Size

* Crank Length

* Chainrings

* Sprockets

* NOTE: There are many sprocket combinations built-in, but if we don't have yours, you can select "CUSTOM SPROCKETS" which will allow you enter up to 10 user defined sprockets at a time.

Results Show:

* Gear Inches

* Gain Ratio

* Meters Development

* MPH at 60, 70, 80, 90, 100, 110, and 120 RPM

* KPH at 60, 70, 80, 90, 100, 110, and 120 RPM

View iPhone screenshots | View iPad screenshots

iPhone Screenshots

Bicycle Gear Head iPhone Screenshot 1

iPad Screenshots

Bicycle Gear Head iPad Screenshot 1
Bicycle Gear Head iPad Screenshot 2
Bicycle Gear Head iPad Screenshot 3

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Rated 3/5 based on 3 customer reviews.


4/5 stars

Not Extinct

This application is built to do one thing but do it /well/. It's still a little tricky to control but I have high hopes for it.

0/5 stars

Almost useful...

I had high hopes for this app until I handed over my $3 only to find you can only use the wheel/tire sizes, chainring combos, and cassette cog sizes that are Pre-programmed. Until the capability to define your own chainring/cog combos is added this is not useful to a true gearhead.

5/5 stars

Useful app, beautifully done

This is, I think, the most useful of the bicycle gearing apps for those with multi-speed (not fixie) bikes, because it shows the full set of available gear combinations at once. Thus it is useful for gear-set design or modifications.

... Two possible improvements:

- a black-on-white "column" (vs. the present "row") chart to screen-shot, print, and put on bike (clip to a brake cable, or whatever) -- that is, in photo terms, a "portrait" not a "landscape"

- the capability to save and name custom "clusters" of sprockets, and custom chainring/cluster combos; ideally these could be uploaded to a website and shared with others.


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The information may be outdated (2011-04-24 22:23:39). For actual information go to iTunes

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