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転子クランク表 | |||||||||||||||
転子 (cm) | クランク長(mm) | ||||||||||||||
A1 | A2 | A3 | A4 | A5 | B1 | B2 | B3 | B4 | B5 | C1 | C2 | C3 | C4 | C5 | |
18.0% | 18.2% | 18.5% | 18.8% | 19.1% | 19.4% | 19.7% | 19.9% | 20.2% | 20.5% | 20.8% | 21.1% | 21.4% | 21.6% | 21.9% | |
58.5 | 105 | 105 | 107.5 | 110 | 110 | 112.5 | 115 | 115 | 117.5 | 120 | 120 | 122.5 | 122.5 | 125 | 127.5 |
59.7 | 105 | 107.5 | 110 | 110 | 112.5 | 115 | 115 | 117.5 | 120 | 122.5 | 122.5 | 125 | 127.5 | 127.5 | 130 |
60.6 | 107.5 | 110 | 110 | 112.5 | 115 | 115 | 117.5 | 120 | 122.5 | 122.5 | 125 | 127.5 | 127.5 | 130 | 132.5 |
61.3 | 110 | 110 | 112.5 | 115 | 115 | 117.5 | 120 | 120 | 122.5 | 125 | 127.5 | 127.5 | 130 | 132.5 | 132.5 |
62.2 | 110 | 112.5 | 115 | 115 | 117.5 | 120 | 120 | 122.5 | 125 | 127.5 | 127.5 | 130 | 132.5 | 132.5 | 135 |
63.1 | 112.5 | 115 | 115 | 117.5 | 120 | 120 | 122.5 | 125 | 127.5 | 127.5 | 130 | 132.5 | 132.5 | 135 | 137.5 |
63.7 | 112.5 | 115 | 117.5 | 117.5 | 120 | 122.5 | 125 | 125 | 127.5 | 130 | 132.5 | 132.5 | 135 | 137.5 | 137.5 |
64.6 | 115 | 117.5 | 117.5 | 120 | 122.5 | 125 | 125 | 127.5 | 130 | 132.5 | 132.5 | 135 | 137.5 | 137.5 | 140 |
65.5 | 117.5 | 117.5 | 120 | 122.5 | 125 | 125 | 127.5 | 130 | 132.5 | 132.5 | 135 | 137.5 | 137.5 | 140 | 142.5 |
66.1 | 117.5 | 120 | 122.5 | 122.5 | 125 | 127.5 | 130 | 130 | 132.5 | 135 | 137.5 | 137.5 | 140 | 142.5 | 142.5 |
67.1 | 120 | 120 | 122.5 | 125 | 127.5 | 127.5 | 130 | 132.5 | 135 | 137.5 | 137.5 | 140 | 142.5 | 145 | 145 |
68.0 | 120 | 122.5 | 125 | 127.5 | 127.5 | 130 | 132.5 | 135 | 137.5 | 137.5 | 140 | 142.5 | 145 | 145 | 147.5 |
68.6 | 122.5 | 125 | 125 | 127.5 | 130 | 132.5 | 132.5 | 135 | 137.5 | 140 | 142.5 | 142.5 | 145 | 147.5 | 150 |
69.5 | 122.5 | 125 | 127.5 | 130 | 132.5 | 132.5 | 135 | 137.5 | 140 | 142.5 | 142.5 | 145 | 147.5 | 150 | 150 |
70.5 | 125 | 127.5 | 130 | 132.5 | 132.5 | 135 | 137.5 | 140 | 142.5 | 142.5 | 145 | 147.5 | 150 | 150 | 152.5 |
71.0 | 125 | 127.5 | 130 | 132.5 | 135 | 135 | 137.5 | 140 | 142.5 | 145 | 147.5 | 147.5 | 150 | 152.5 | 155 |
71.9 | 127.5 | 130 | 132.5 | 135 | 135 | 137.5 | 140 | 142.5 | 145 | 147.5 | 147.5 | 150 | 152.5 | 155 | 157.5 |
72.9 | 130 | 132.5 | 135 | 135 | 137.5 | 140 | 142.5 | 145 | 147.5 | 147.5 | 150 | 152.5 | 155 | 157.5 | 157.5 |
73.4 | 130 | 132.5 | 135 | 137.5 | 140 | 140 | 142.5 | 145 | 147.5 | 150 | 152.5 | 152.5 | 155 | 157.5 | 160 |
74.4 | 132.5 | 135 | 137.5 | 137.5 | 140 | 142.5 | 145 | 147.5 | 150 | 152.5 | 152.5 | 155 | 157.5 | 160 | 162.5 |
75.2 | 132.5 | 135 | 137.5 | 140 | 142.5 | 145 | 147.5 | 147.5 | 152 | 152.5 | 155 | 157.5 | 160 | 162.5 | 162.5 |
76.5 | 135 | 137.5 | 140 | 142.5 | 145 | 147.5 | 150 | 152 | 152.5 | 155 | 157.5 | 160 | 162.5 | 165 | 167.5 |
76.8 | 137.5 | 140 | 140 | 142.5 | 145 | 147.5 | 150 | 152.5 | 155 | 157.5 | 157.5 | 160 | 162.5 | 165 | 167.5 |
77.9 | 137.5 | 140 | 142.5 | 145 | 147.5 | 150 | 152.5 | 155 | 157.5 | 157.5 | 160 | 162.5 | 165 | 167.5 | 170 |
78.2 | 140 | 142.5 | 142.5 | 145 | 147.5 | 150 | 152.5 | 155 | 157.5 | 160 | 162.5 | 162.5 | 165 | 167.5 | 170 |
79.3 | 140 | 142.5 | 145 | 147.5 | 150 | 152.5 | 155 | 157.5 | 160 | 162.5 | 162.5 | 165 | 167.5 | 170 | 172.5 |
80.5 | 142.5 | 145 | 147.5 | 150 | 152.5 | 155 | 157.5 | 160 | 162.5 | 165 | 165 | 167.5 | 170 | 172.5 | 175 |
81.7 | 145 | 147.5 | 150 | 152.5 | 155 | 157.5 | 160 | 162.5 | 165 | 167.5 | 167.5 | 170 | 172.5 | 175 | 177.5 |
82.9 | 147.5 | 150 | 152.5 | 155 | 157.5 | 160 | 162.5 | 165 | 167.5 | 170 | 170 | 172.5 | 175 | 177.5 | 180 |
84.1 | 150 | 152.5 | 155 | 157.5 | 160 | 162.5 | 165 | 167.5 | 170 | 172.5 | 172.5 | 175 | 177.5 | 180 | 182.5 |
85.3 | 152.5 | 155 | 157.5 | 160 | 162.5 | 165 | 167.5 | 170 | 172.5 | 172.5 | 175 | 177.5 | 180 | 182.5 | 185 |
86.5 | 155 | 157.5 | 160 | 162.5 | 165 | 167.5 | 170 | 172.5 | 172.5 | 175 | 177.5 | 180 | 182.5 | 185 | 187.5 |
87.8 | 157.5 | 160 | 162.5 | 165 | 167.5 | 170 | 172.5 | 172.5 | 175 | 177.5 | 180 | 182.5 | 185 | 187.5 | 190 |
89.1 | 157.5 | 160 | 162.5 | 165 | 170 | 172.5 | 175 | 177.5 | 180 | 182.5 | 185 | 187.5 | 190 | 192.5 | 195 |
90.4 | 160 | 162.5 | 165 | 170 | 172.5 | 175 | 177.5 | 180 | 182.5 | 185 | 187.5 | 190 | 192.5 | 195 | 197.5 |
91.8 | 162.5 | 165 | 170 | 172.5 | 175 | 177.5 | 180 | 182.5 | 185 | 187.5 | 190 | 192.5 | 195 | 197.5 | 200 |
93.1 | 165 | 167.5 | 172.5 | 175 | 177.5 | 180 | 182.5 | 185 | 187.5 | 190 | 192.5 | 195 | 197.5 | 200 | 202.5 |
94.6 | 167.5 | 172.5 | 175 | 177.5 | 180 | 182.5 | 185 | 187.5 | 190 | 192.5 | 195 | 197.5 | 200 | 202.5 | 205 |
96.1 | 172.5 | 175 | 177.5 | 180 | 182.5 | 185 | 187.5 | 190 | 192.5 | 195 | 197.5 | 200 | 205 | 207.5 | 210 |
97.5 | 175 | 177.5 | 180 | 182.5 | 185 | 187.5 | 190 | 192.5 | 195 | 197.5 | 202.5 | 205 | 207.5 | 210 | 212.5 |
98.9 | 177.5 | 180 | 182.5 | 185 | 187.5 | 190 | 192.5 | 195 | 197.5 | 202.5 | 205 | 207.5 | 210 | 212.5 | 215 |
100.2 | 180 | 182.5 | 185 | 187.5 | 190 | 192.5 | 195 | 197.5 | 202.5 | 205 | 207.5 | 210 | 212.5 | 215 | 217.5 |
大腿クランク表 | |||||||||||||||
大腿 (cm) | クランク長(mm) | ||||||||||||||
A1 | A2 | A3 | A4 | A5 | B1 | B2 | B3 | B4 | B5 | C1 | C2 | C3 | C4 | C5 | |
38.0% | 38.7% | 39.3% | 40.0% | 40.7% | 41.4% | 42.1% | 42.8% | 43.5% | 44.2% | 44.9% | 45.6% | 46.3% | 47.0% | 47.7% | |
27.3 | 102.5 | 105 | 105 | 107.5 | 110 | 112.5 | 112.5 | 115 | 117.5 | 120 | 122.5 | 122.5 | 125 | 127.5 | 130 |
27.7 | 105 | 105 | 107.5 | 110 | 112.5 | 112.5 | 115 | 117.5 | 120 | 122.5 | 122.5 | 125 | 127.5 | 130 | 130 |
28.2 | 105 | 107.5 | 110 | 112.5 | 112.5 | 115 | 117.5 | 120 | 122.5 | 122.5 | 125 | 127.5 | 130 | 130 | 132.5 |
28.3 | 105 | 107.5 | 110 | 112.5 | 115 | 115 | 117.5 | 120 | 122.5 | 125 | 125 | 127.5 | 130 | 132.5 | 132.5 |
28.8 | 107.5 | 110 | 112.5 | 115 | 115 | 117.5 | 120 | 122.5 | 125 | 127.5 | 127.5 | 130 | 132.5 | 135 | 137.5 |
29.3 | 110 | 112.5 | 115 | 115 | 117.5 | 120 | 122.5 | 125 | 127.5 | 127.5 | 130 | 132.5 | 135 | 137.5 | 137.5 |
29.4 | 110 | 112.5 | 115 | 117.5 | 117.5 | 120 | 122.5 | 125 | 127.5 | 130 | 130 | 132.5 | 135 | 137.5 | 140 |
30.0 | 112.5 | 115 | 117.5 | 120 | 120 | 122.5 | 125 | 127.5 | 130 | 132.5 | 132.5 | 135 | 137.5 | 140 | 142.5 |
30.5 | 115 | 117.5 | 117.5 | 120 | 122.5 | 125 | 127.5 | 130 | 132.5 | 132.5 | 135 | 137.5 | 140 | 142.5 | 145 |
30.6 | 115 | 117.5 | 120 | 122.5 | 122.5 | 125 | 127.5 | 130 | 132.5 | 135 | 137.5 | 137.5 | 140 | 142.5 | 145 |
31.1 | 117.5 | 120 | 120 | 122.5 | 125 | 127.5 | 130 | 132.5 | 135 | 137.5 | 137.5 | 140 | 142.5 | 145 | 147.5 |
31.6 | 117.5 | 120 | 122.5 | 125 | 127.5 | 130 | 132.5 | 135 | 137.5 | 137.5 | 140 | 142.5 | 145 | 147.5 | 150 |
31.7 | 120 | 122.5 | 122.5 | 125 | 127.5 | 130 | 132.5 | 135 | 137.5 | 140 | 142.5 | 142.5 | 145 | 147.5 | 150 |
32.2 | 120 | 122.5 | 125 | 127.5 | 130 | 132.5 | 135 | 137.5 | 140 | 142.5 | 142.5 | 145 | 147.5 | 150 | 152.5 |
32.9 | 122.5 | 125 | 127.5 | 130 | 132.5 | 135 | 137.5 | 140 | 142.5 | 145 | 147.5 | 147.5 | 150 | 152.5 | 155 |
33.4 | 125 | 127.5 | 130 | 132.5 | 135 | 137.5 | 140 | 142.5 | 145 | 147.5 | 147.5 | 150 | 152.5 | 155 | 157.5 |
34.0 | 127.5 | 130 | 132.5 | 135 | 137.5 | 140 | 142.5 | 145 | 147.5 | 150 | 152.5 | 152.5 | 155 | 157.5 | 160 |
34.5 | 130 | 132.5 | 135 | 137.5 | 140 | 142.5 | 145 | 147.5 | 150 | 152.5 | 152.5 | 155 | 157.5 | 160 | 162.5 |
34.9 | 132.5 | 135 | 135 | 137.5 | 140 | 142.5 | 145 | 147.5 | 152 | 152.5 | 155 | 157.5 | 160 | 162.5 | 165 |
35.5 | 132.5 | 135 | 137.5 | 140 | 142.5 | 145 | 147.5 | 152 | 152.5 | 155 | 157.5 | 160 | 162.5 | 165 | 167.5 |
35.6 | 135 | 137.5 | 140 | 142.5 | 145 | 147.5 | 150 | 152.5 | 155 | 157.5 | 157.5 | 160 | 162.5 | 165 | 167.5 |
36.2 | 135 | 137.5 | 140 | 142.5 | 145 | 147.5 | 150 | 155 | 157.5 | 160 | 162.5 | 165 | 167.5 | 170 | 172.5 |
36.8 | 137.5 | 140 | 142.5 | 145 | 147.5 | 150 | 155 | 157.5 | 160 | 162.5 | 165 | 167.5 | 170 | 172.5 | 175 |
37.4 | 140 | 142.5 | 145 | 147.5 | 150 | 152.5 | 157.5 | 160 | 162.5 | 165 | 167.5 | 170 | 172.5 | 175 | 177.5 |
38.0 | 142.5 | 145 | 147.5 | 150 | 152.5 | 155 | 160 | 162.5 | 165 | 167.5 | 170 | 172.5 | 175 | 177.5 | 180 |
38.6 | 145 | 147.5 | 150 | 152.5 | 155 | 157.5 | 162.5 | 165 | 167.5 | 170 | 172.5 | 175 | 177.5 | 180 | 182.5 |
39.2 | 147.5 | 150 | 152.5 | 155 | 157.5 | 160 | 165 | 167.5 | 170 | 172.5 | 175 | 177.5 | 180 | 182.5 | 185 |
39.8 | 150 | 152.5 | 155 | 157.5 | 160 | 165 | 167.5 | 170 | 172.5 | 175 | 177.5 | 180 | 182.5 | 185 | 187.5 |
40.5 | 152.5 | 155 | 157.5 | 160 | 165 | 167.5 | 170 | 172.5 | 175 | 177.5 | 180 | 182.5 | 185 | 190 | 192.5 |
41.2 | 155 | 157.5 | 160 | 165 | 167.5 | 170 | 172.5 | 175 | 177.5 | 180 | 185 | 187.5 | 190 | 192.5 | 195 |
41.8 | 157.5 | 160 | 162.5 | 167.5 | 170 | 172.5 | 175 | 177.5 | 180 | 182.5 | 187.5 | 190 | 192.5 | 195 | 197.5 |
42.6 | 160 | 162.5 | 167.5 | 170 | 172.5 | 175 | 177.5 | 180 | 185 | 187.5 | 190 | 192.5 | 195 | 197.5 | 202.5 |
43.3 | 162.5 | 167.5 | 170 | 172.5 | 175 | 177.5 | 182.5 | 185 | 187.5 | 190 | 192.5 | 197.5 | 200 | 202.5 | 205 |
44.0 | 165 | 170 | 172.5 | 175 | 177.5 | 180 | 185 | 187.5 | 190 | 192.5 | 195 | 200 | 202.5 | 205 | 207.5 |
44.8 | 170 | 172.5 | 175 | 177.5 | 180 | 185 | 187.5 | 190 | 192.5 | 197.5 | 200 | 202.5 | 205 | 210 | 212.5 |
45.4 | 172.5 | 175 | 177.5 | 180 | 185 | 187.5 | 190 | 192.5 | 197.5 | 200 | 202.5 | 205 | 210 | 212.5 | 215 |
46.1 | 175 | 177.5 | 180 | 182.5 | 187.5 | 190 | 192.5 | 195 | 200 | 202.5 | 205 | 210 | 212.5 | 215 | 217.5 |
46.8 | 177.5 | 180 | 182.5 | 185 | 190 | 192.5 | 195 | 200 | 202.5 | 205 | 207.5 | 212.5 | 215 | 217.5 | 222.5 |
47.4 | 180 | 182.5 | 185 | 187.5 | 192.5 | 195 | 197.5 | 202.5 | 205 | 207.5 | 212.5 | 215 | 217.5 | 222.5 | 225 |
仮基準クランク長は日本人成人男性に最適化しているので、成長期の子供の 1本目のクランクとして薦める目的では無く、メーカー・ショップ・指導者が 選んだクランク長との比較用として記載します。 | |||||||||||||||
踏みしか出来ないフラットペダルや、90rpm以上を持続する回転スキル未習熟 で、短期的な結果が必要なら仮基準クランク長より5mm長いクランクでもよい。 |
成長とクランク交換 5mm単位 | |||||
B4  20.2% | 男子 | 女子 | |||
クランク長 (mm) | 転子高 (cm) | 年齢 (歳) | 身長 (cm) | 年齢 (歳) | 身長 (cm) |
140 | 69.2 | 10.0 | 135.8 |  9.7 | 134.4 |
145 | 71.7 | 10.8 | 140.3 | 10.4 | 139.1 |
150 | 74.2 | 11.5 | 144.7 | 11.1 | 144.0 |
155 | 76.7 | 12.1 | 149.4 | 12.0 | 149.2 |
160 | 79.1 | 12.8 | 154.2 | 13.3 | 154.4 |
165 | 81.6 | 13.4 | 159.0 |   | |
170 | 84.1 | 14.3 | 164.1 |   | |
175 | 86.5 | 16.4 | 169.7 |   | |
163.5 | 80.9 |   | 成人 | 158.7 | |
176.8 | 87.5 | 成人 | 172.0 |   | |
平均の身長・転子高で成長する子供と、転子高の20.2%・比率"B4"で比較。 男子:4.4年で(10.0〜14.3歳) 8.7ヶ月毎に6回交換(140〜170mm) 女子:3.6年で( 9.7〜13.3歳)10.9ヶ月毎に4回交換(140〜160mm) | |||||
ちなみに、脚の長さの伸びに合わせてサドル高を上げると… 男子:4.4年で(10.0〜14.3歳)13.6日毎( 2週間)に1mm上昇 女子:3.6年で( 9.7〜13.3歳)17.3日毎(2.5週間)に1mm上昇 |