Junior Track Cycling Velodrome cycling for junior (18 and under) riders

April 6, 2006

New Gear Chart

Filed under: Cycling — Administrator @ 8:16 pm

Welcome to the new Junior Velo gear chart. I believe it is a huge improvement over the original. Changes appear almost instantly. You can change the highlighting to reflect US, Australian, or road racing rules. You can add and remove as many cogs and rings as you like. Enjoy.

The chart should appear here, unless you have JavaScript turned off. Please consider turning it on, or use the older server-based gear chart.


  1. The chart reflects USCF and Australian rules as of 2006. The UCI specifies only the 7.93 meter road gear limit for juniors.
  2. Some typical rolling diameters are shown below. For more accurate results, use actual measurements from your own wheels and tires.
    Tire size Effective diameter
    700c x 23mm 26.57 in 675 mm
    700c x 20mm 26.26 in 667 mm
    650c x 23mm 24.57 in 624 mm
  3. You may add cogs or chainrings one at a time, in a list (14,19), or using a range (44-46).
  4. The chart will save your choices between visits, as long as you are on the same computer and browser. This doesn’t work if cookies are disabled.
  5. Internet Explorer users will find that some controls don’t respond right away. Try using “tab” rather than “enter” after entering a number, or clicking somewhere else after using a control. Even better, get Firefox.
  6. If you don’t have JavaScript enabled, please use the old calculator.


  • Gear Inches – Chainring teeth/cog teeth * 27 inches. This is traditional, but does not reflect any actual dimension of the bike.
  • Exact Inches – Similar to Gear Inches, but using the actual rolling diameter of the wheel in inches.
  • Rollout – How far the bike rolls in one revolution of the pedals.
  • Speed – What we want more of.
  • Cadence – Revolutions of the pedals per second.
  • Effective diameter – How far the wheel rolls in one revolution, divided by Pi. This take tire flex into account better than measuring the wheel with a ruler. Also called Effective diameter.


  1. nice calculator, really helpful. thanks

    Comment by alex — November 5, 2006 @ 8:44 pm

  2. Thanks a lot a real big help

    Comment by Allan Paraha — February 25, 2007 @ 6:43 pm

  3. Is there an age limit to track cycling? In this – how young can a person be to do track cycling?

    Comment by Brenda — October 28, 2007 @ 11:49 pm

  4. In the USA, there are racing categories starting at age 10. Of course a given event may or may not offer all age categories. Some tracks have informal races for smaller children as well, but track bikes (no brakes, no coasting, no shifting) usually are not used for these.

    Given permission, any child who can ride on a sidewalk can ride on a track, except for the steep tracks (only a few in this country) where a substantial speed must be maintained to keep from sliding down the banked turns.

    Comment by Administrator — October 29, 2007 @ 7:41 am


    Comment by Thomas Hildebrand — December 13, 2007 @ 4:38 pm

  6. After typing in “bucycle Gear rations”, presto and there was your great calculator. It was very useful, thanks.

    Comment by Hball — September 2, 2008 @ 11:58 pm

  7. Great site

    Comment by Pat O'Hare — October 5, 2008 @ 6:22 am

  8. Incredibly useful – many thanks!! 🙂

    Comment by victor — October 14, 2008 @ 7:15 am

  9. Thanks for the calculator! It’s a godsend

    Comment by Josh — April 27, 2009 @ 10:49 pm

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