GEAR CHART FREE WHEEL 30.0 29.0 28.0 27.0 26.0 25.0 24.0 23.0 22.0 21.0 20.0 19.0 18.0 17.0 16.0 15.0 14.0 13.0 12.0 ------------------------------------------------------------------------------------------------------------------------ 26.0 | 23.4 24.2 25.1 26.0 27.0 28.1 29.3 30.5 31.9 33.4 35.1 36.9 39.0 41.3 43.9 46.8 50.1 54.0 58.5 27.0 | 24.3 25.1 26.0 27.0 28.0 29.2 30.4 31.7 33.1 34.7 36.5 38.4 40.5 42.9 45.6 48.6 52.1 56.1 60.8 28.0 | 25.2 26.1 27.0 28.0 29.1 30.2 31.5 32.9 34.4 36.0 37.8 39.8 42.0 44.5 47.3 50.4 54.0 58.2 63.0 29.0 | 26.1 27.0 28.0 29.0 30.1 31.3 32.6 34.0 35.6 37.3 39.2 41.2 43.5 46.1 48.9 52.2 55.9 60.2 65.3 30.0 | 27.0 27.9 28.9 30.0 31.2 32.4 33.8 35.2 36.8 38.6 40.5 42.6 45.0 47.6 50.6 54.0 57.9 62.3 67.5 31.0 | 27.9 28.9 29.9 31.0 32.2 33.5 34.9 36.4 38.0 39.9 41.9 44.1 46.5 49.2 52.3 55.8 59.8 64.4 69.8 32.0 | 28.8 29.8 30.9 32.0 33.2 34.6 36.0 37.6 39.3 41.1 43.2 45.5 48.0 50.8 54.0 57.6 61.7 66.5 72.0 33.0 | 29.7 30.7 31.8 33.0 34.3 35.6 37.1 38.7 40.5 42.4 44.6 46.9 49.5 52.4 55.7 59.4 63.6 68.5 74.3 34.0 | 30.6 31.7 32.8 34.0 35.3 36.7 38.3 39.9 41.7 43.7 45.9 48.3 51.0 54.0 57.4 61.2 65.6 70.6 76.5 35.0 | 31.5 32.6 33.8 35.0 36.3 37.8 39.4 41.1 43.0 45.0 47.3 49.7 52.5 55.6 59.1 63.0 67.5 72.7 78.8 36.0 | 32.4 33.5 34.7 36.0 37.4 38.9 40.5 42.3 44.2 46.3 48.6 51.2 54.0 57.2 60.8 64.8 69.4 74.8 81.0 37.0 | 33.3 34.4 35.7 37.0 38.4 40.0 41.6 43.4 45.4 47.6 50.0 52.6 55.5 58.8 62.4 66.6 71.4 76.8 83.3 38.0 | 34.2 35.4 36.6 38.0 39.5 41.0 42.8 44.6 46.6 48.9 51.3 54.0 57.0 60.4 64.1 68.4 73.3 78.9 85.5 39.0 | 35.1 36.3 37.6 39.0 40.5 42.1 43.9 45.8 47.9 50.1 52.7 55.4 58.5 61.9 65.8 70.2 75.2 81.0 87.8 40.0 | 36.0 37.2 38.6 40.0 41.5 43.2 45.0 47.0 49.1 51.4 54.0 56.8 60.0 63.5 67.5 72.0 77.1 83.1 90.0 41.0 | 36.9 38.2 39.5 41.0 42.6 44.3 46.1 48.1 50.3 52.7 55.4 58.3 61.5 65.1 69.2 73.8 79.1 85.2 92.3 42.0 | 37.8 39.1 40.5 42.0 43.6 45.4 47.3 49.3 51.5 54.0 56.7 59.7 63.0 66.7 70.9 75.6 81.0 87.2 94.5 43.0 | 38.7 40.0 41.5 43.0 44.7 46.4 48.4 50.5 52.8 55.3 58.1 61.1 64.5 68.3 72.6 77.4 82.9 89.3 96.8 44.0 | 39.6 41.0 42.4 44.0 45.7 47.5 49.5 51.7 54.0 56.6 59.4 62.5 66.0 69.9 74.3 79.2 84.9 91.4 99.0 45.0 | 40.5 41.9 43.4 45.0 46.7 48.6 50.6 52.8 55.2 57.9 60.8 63.9 67.5 71.5 75.9 81.0 86.8 93.5 101.3 46.0 | 41.4 42.8 44.4 46.0 47.8 49.7 51.8 54.0 56.5 59.1 62.1 65.4 69.0 73.1 77.6 82.8 88.7 95.5 103.5 47.0 | 42.3 43.8 45.3 47.0 48.8 50.8 52.9 55.2 57.7 60.4 63.5 66.8 70.5 74.6 79.3 84.6 90.6 97.6 105.8 48.0 | 43.2 44.7 46.3 48.0 49.8 51.8 54.0 56.3 58.9 61.7 64.8 68.2 72.0 76.2 81.0 86.4 92.6 99.7 108.0 49.0 | 44.1 45.6 47.3 49.0 50.9 52.9 55.1 57.5 60.1 63.0 66.2 69.6 73.5 77.8 82.7 88.2 94.5 101.8 110.3 50.0 | 45.0 46.6 48.2 50.0 51.9 54.0 56.3 58.7 61.4 64.3 67.5 71.1 75.0 79.4 84.4 90.0 96.4 103.8 112.5 51.0 | 45.9 47.5 49.2 51.0 53.0 55.1 57.4 59.9 62.6 65.6 68.9 72.5 76.5 81.0 86.1 91.8 98.4 105.9 114.8 52.0 | 46.8 48.4 50.1 52.0 54.0 56.2 58.5 61.0 63.8 66.9 70.2 73.9 78.0 82.6 87.8 93.6 100.3 108.0 117.0 53.0 | 47.7 49.3 51.1 53.0 55.0 57.2 59.6 62.2 65.0 68.1 71.6 75.3 79.5 84.2 89.4 95.4 102.2 110.1 119.3 54.0 | 48.6 50.3 52.1 54.0 56.1 58.3 60.8 63.4 66.3 69.4 72.9 76.7 81.0 85.8 91.1 97.2 104.1 112.2 121.5 55.0 | 49.5 51.2 53.0 55.0 57.1 59.4 61.9 64.6 67.5 70.7 74.3 78.2 82.5 87.4 92.8 99.0 106.1 114.2 123.8 56.0 | 50.4 52.1 54.0 56.0 58.2 60.5 63.0 65.7 68.7 72.0 75.6 79.6 84.0 88.9 94.5 100.8 108.0 116.3 126.0 chainring / freewheel x 27 = chain inches chain inches x PI (3.14) = distance per pedal revolution chain inches x PI (3.14) x RPM x 60 / 63,360 = speed