|
|
|
BMX Gearing Chart
|
Gear Ratios
| f/r |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
| 25 |
2.78 |
2.50 |
2.27 |
2.08 |
1.92 |
1.79 |
1.67 |
1.56 |
1.47 |
1.39 |
1.32 |
1.25 |
| 26 |
2.89 |
2.60 |
2.36 |
2.17 |
2.00 |
1.86 |
1.73 |
1.63 |
1.53 |
1.44 |
1.37 |
1.30 |
| 27 |
3.00 |
2.70 |
2.45 |
2.25 |
2.08 |
1.93 |
1.80 |
1.69 |
1.59 |
1.50 |
1.42 |
1.35 |
| 28 |
3.11 |
2.80 |
2.55 |
2.33 |
2.15 |
2.00 |
1.87 |
1.75 |
1.65 |
1.56 |
1.47 |
1.40 |
| 29 |
3.22 |
2.90 |
2.64 |
2.42 |
2.23 |
2.07 |
1.93 |
1.81 |
1.71 |
1.61 |
1.53 |
1.45 |
| 30 |
3.33 |
3.00 |
2.73 |
2.50 |
2.31 |
2.14 |
2.00 |
1.88 |
1.76 |
1.67 |
1.58 |
1.50 |
| 31 |
3.44 |
3.10 |
2.82 |
2.58 |
2.38 |
2.21 |
2.07 |
1.94 |
1.82 |
1.72 |
1.63 |
1.55 |
| 32 |
3.56 |
3.20 |
2.91 |
2.67 |
2.46 |
2.29 |
2.13 |
2.00 |
1.88 |
1.78 |
1.68 |
1.60 |
| 33 |
3.67 |
3.30 |
3.00 |
2.75 |
2.54 |
2.36 |
2.20 |
2.06 |
1.94 |
1.83 |
1.74 |
1.65 |
| 34 |
3.78 |
3.40 |
3.09 |
2.83 |
2.62 |
2.43 |
2.27 |
2.13 |
2.00 |
1.89 |
1.79 |
1.70 |
| 35 |
3.89 |
3.50 |
3.18 |
2.92 |
2.69 |
2.50 |
2.33 |
2.19 |
2.06 |
1.94 |
1.84 |
1.75 |
| 36 |
4.00 |
3.60 |
3.27 |
3.00 |
2.77 |
2.57 |
2.40 |
2.25 |
2.12 |
2.00 |
1.89 |
1.80 |
| 37 |
4.11 |
3.70 |
3.36 |
3.08 |
2.85 |
2.64 |
2.47 |
2.31 |
2.18 |
2.06 |
1.95 |
1.85 |
| 38 |
4.22 |
3.80 |
3.45 |
3.17 |
2.92 |
2.71 |
2.53 |
2.38 |
2.24 |
2.11 |
2.00 |
1.90 |
| 39 |
4.33 |
3.90 |
3.55 |
3.25 |
3.00 |
2.79 |
2.60 |
2.44 |
2.29 |
2.17 |
2.05 |
1.95 |
| 40 |
4.44 |
4.00 |
3.64 |
3.33 |
3.08 |
2.86 |
2.67 |
2.50 |
2.35 |
2.22 |
2.11 |
2.00 |
| 41 |
4.56 |
4.10 |
3.73 |
3.42 |
3.15 |
2.93 |
2.73 |
2.56 |
2.41 |
2.28 |
2.16 |
2.05 |
| 42 |
4.67 |
4.20 |
3.82 |
3.50 |
3.23 |
3.00 |
2.80 |
2.63 |
2.47 |
2.33 |
2.21 |
2.10 |
| 43 |
4.78 |
4.30 |
3.91 |
3.58 |
3.31 |
3.07 |
2.87 |
2.69 |
2.53 |
2.39 |
2.26 |
2.15 |
| 44 |
4.89 |
4.40 |
4.00 |
3.67 |
3.38 |
3.14 |
2.93 |
2.75 |
2.59 |
2.44 |
2.32 |
2.20 |
| 45 |
5.00 |
4.50 |
4.09 |
3.75 |
3.46 |
3.21 |
3.00 |
2.81 |
2.65 |
2.50 |
2.37 |
2.25 |
Distance per Crank Revolution for 20" Wheel
Distance per Wheel Revolution: 62.8318"
Sweet spot is >= 167" <= 175"
| f/r |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
| 25 |
174.53" |
157.08" |
142.80" |
130.90" |
120.83" |
112.20" |
104.72" |
98.17" |
92.40" |
87.27" |
82.67" |
78.54" |
| 26 |
181.51" |
163.36" |
148.51" |
136.14" |
125.66" |
116.69" |
108.91" |
102.10" |
96.10" |
90.76" |
85.98" |
81.68" |
| 27 |
188.50" |
169.65" |
154.22" |
141.37" |
130.50" |
121.18" |
113.10" |
106.03" |
99.79" |
94.25" |
89.29" |
84.82" |
| 28 |
195.48" |
175.93" |
159.94" |
146.61" |
135.33" |
125.66" |
117.29" |
109.96" |
103.49" |
97.74" |
92.59" |
87.96" |
| 29 |
202.46" |
182.21" |
165.65" |
151.84" |
140.16" |
130.15" |
121.47" |
113.88" |
107.18" |
101.23" |
95.90" |
91.11" |
| 30 |
209.44" |
188.50" |
171.36" |
157.08" |
145.00" |
134.64" |
125.66" |
117.81" |
110.88" |
104.72" |
99.21" |
94.25" |
| 31 |
216.42" |
194.78" |
177.07" |
162.32" |
149.83" |
139.13" |
129.85" |
121.74" |
114.58" |
108.21" |
102.52" |
97.39" |
| 32 |
223.40" |
201.06" |
182.78" |
167.55" |
154.66" |
143.62" |
134.04" |
125.66" |
118.27" |
111.70" |
105.82" |
100.53" |
| 33 |
230.38" |
207.34" |
188.50" |
172.79" |
159.50" |
148.10" |
138.23" |
129.59" |
121.97" |
115.19" |
109.13" |
103.67" |
| 34 |
237.36" |
213.63" |
194.21" |
178.02" |
164.33" |
152.59" |
142.42" |
133.52" |
125.66" |
118.68" |
112.44" |
106.81" |
| 35 |
244.35" |
219.91" |
199.92" |
183.26" |
169.16" |
157.08" |
146.61" |
137.44" |
129.36" |
122.17" |
115.74" |
109.96" |
| 36 |
251.33" |
226.19" |
205.63" |
188.50" |
174.00" |
161.57" |
150.80" |
141.37" |
133.06" |
125.66" |
119.05" |
113.10" |
| 37 |
258.31" |
232.48" |
211.34" |
193.73" |
178.83" |
166.06" |
154.99" |
145.30" |
136.75" |
129.15" |
122.36" |
116.24" |
| 38 |
265.29" |
238.76" |
217.06" |
198.97" |
183.66" |
170.54" |
159.17" |
149.23" |
140.45" |
132.64" |
125.66" |
119.38" |
| 39 |
272.27" |
245.04" |
222.77" |
204.20" |
188.50" |
175.03" |
163.36" |
153.15" |
144.14" |
136.14" |
128.97" |
122.52" |
| 40 |
279.25" |
251.33" |
228.48" |
209.44" |
193.33" |
179.52" |
167.55" |
157.08" |
147.84" |
139.63" |
132.28" |
125.66" |
| 41 |
286.23" |
257.61" |
234.19" |
214.68" |
198.16" |
184.01" |
171.74" |
161.01" |
151.54" |
143.12" |
135.58" |
128.81" |
| 42 |
293.22" |
263.89" |
239.90" |
219.91" |
203.00" |
188.50" |
175.93" |
164.93" |
155.23" |
146.61" |
138.89" |
131.95" |
| 43 |
300.20" |
270.18" |
245.62" |
225.15" |
207.83" |
192.98" |
180.12" |
168.86" |
158.93" |
150.10" |
142.20" |
135.09" |
| 44 |
307.18" |
276.46" |
251.33" |
230.38" |
212.66" |
197.47" |
184.31" |
172.79" |
162.62" |
153.59" |
145.51" |
138.23" |
| 45 |
314.16" |
282.74" |
257.04" |
235.62" |
217.49" |
201.96" |
188.50" |
176.71" |
166.32" |
157.08" |
148.81" |
141.37" |
Distance per Crank Revolution for 22" Wheel
Distance per Wheel Revolution: 69.11498"
Sweet spot is >= 167" <= 175"
| f/r |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
| 25 |
191.99" |
172.79" |
157.08" |
143.99" |
132.91" |
123.42" |
115.19" |
107.99" |
101.64" |
95.99" |
90.94" |
86.39" |
| 26 |
199.67" |
179.70" |
163.36" |
149.75" |
138.23" |
128.36" |
119.80" |
112.31" |
105.71" |
99.83" |
94.58" |
89.85" |
| 27 |
207.34" |
186.61" |
169.65" |
155.51" |
143.55" |
133.29" |
124.41" |
116.63" |
109.77" |
103.67" |
98.22" |
93.31" |
| 28 |
215.02" |
193.52" |
175.93" |
161.27" |
148.86" |
138.23" |
129.01" |
120.95" |
113.84" |
107.51" |
101.85" |
96.76" |
| 29 |
222.70" |
200.43" |
182.21" |
167.03" |
154.18" |
143.17" |
133.62" |
125.27" |
117.90" |
111.35" |
105.49" |
100.22" |
| 30 |
230.38" |
207.34" |
188.50" |
172.79" |
159.50" |
148.10" |
138.23" |
129.59" |
121.97" |
115.19" |
109.13" |
103.67" |
| 31 |
238.06" |
214.26" |
194.78" |
178.55" |
164.81" |
153.04" |
142.84" |
133.91" |
126.03" |
119.03" |
112.77" |
107.13" |
| 32 |
245.74" |
221.17" |
201.06" |
184.31" |
170.13" |
157.98" |
147.45" |
138.23" |
130.10" |
122.87" |
116.40" |
110.58" |
| 33 |
253.42" |
228.08" |
207.34" |
190.07" |
175.45" |
162.91" |
152.05" |
142.55" |
134.16" |
126.71" |
120.04" |
114.04" |
| 34 |
261.10" |
234.99" |
213.63" |
195.83" |
180.76" |
167.85" |
156.66" |
146.87" |
138.23" |
130.55" |
123.68" |
117.50" |
| 35 |
268.78" |
241.90" |
219.91" |
201.59" |
186.08" |
172.79" |
161.27" |
151.19" |
142.30" |
134.39" |
127.32" |
120.95" |
| 36 |
276.46" |
248.81" |
226.19" |
207.34" |
191.40" |
177.72" |
165.88" |
155.51" |
146.36" |
138.23" |
130.95" |
124.41" |
| 37 |
284.14" |
255.73" |
232.48" |
213.10" |
196.71" |
182.66" |
170.48" |
159.83" |
150.43" |
142.07" |
134.59" |
127.86" |
| 38 |
291.82" |
262.64" |
238.76" |
218.86" |
202.03" |
187.60" |
175.09" |
164.15" |
154.49" |
145.91" |
138.23" |
131.32" |
| 39 |
299.50" |
269.55" |
245.04" |
224.62" |
207.34" |
192.53" |
179.70" |
168.47" |
158.56" |
149.75" |
141.87" |
134.77" |
| 40 |
307.18" |
276.46" |
251.33" |
230.38" |
212.66" |
197.47" |
184.31" |
172.79" |
162.62" |
153.59" |
145.51" |
138.23" |
| 41 |
314.86" |
283.37" |
257.61" |
236.14" |
217.98" |
202.41" |
188.91" |
177.11" |
166.69" |
157.43" |
149.14" |
141.69" |
| 42 |
322.54" |
290.28" |
263.89" |
241.90" |
223.29" |
207.34" |
193.52" |
181.43" |
170.75" |
161.27" |
152.78" |
145.14" |
| 43 |
330.22" |
297.19" |
270.18" |
247.66" |
228.61" |
212.28" |
198.13" |
185.75" |
174.82" |
165.11" |
156.42" |
148.60" |
| 44 |
337.90" |
304.11" |
276.46" |
253.42" |
233.93" |
217.22" |
202.74" |
190.07" |
178.89" |
168.95" |
160.06" |
152.05" |
| 45 |
345.57" |
311.02" |
282.74" |
259.18" |
239.24" |
222.16" |
207.34" |
194.39" |
182.95" |
172.79" |
163.69" |
155.51" |
Distance per Crank Revolution for 24" Wheel
Distance per Wheel Revolution: 75.39816"
Sweet spot is >= 167" <= 175"
| f/r |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
| 25 |
209.44" |
188.50" |
171.36" |
157.08" |
145.00" |
134.64" |
125.66" |
117.81" |
110.88" |
104.72" |
99.21" |
94.25" |
| 26 |
217.82" |
196.04" |
178.21" |
163.36" |
150.80" |
140.03" |
130.69" |
122.52" |
115.31" |
108.91" |
103.18" |
98.02" |
| 27 |
226.19" |
203.58" |
185.07" |
169.65" |
156.60" |
145.41" |
135.72" |
127.23" |
119.75" |
113.10" |
107.14" |
101.79" |
| 28 |
234.57" |
211.11" |
191.92" |
175.93" |
162.40" |
150.80" |
140.74" |
131.95" |
124.19" |
117.29" |
111.11" |
105.56" |
| 29 |
242.95" |
218.65" |
198.78" |
182.21" |
168.20" |
156.18" |
145.77" |
136.66" |
128.62" |
121.47" |
115.08" |
109.33" |
| 30 |
251.33" |
226.19" |
205.63" |
188.50" |
174.00" |
161.57" |
150.80" |
141.37" |
133.06" |
125.66" |
119.05" |
113.10" |
| 31 |
259.70" |
233.73" |
212.49" |
194.78" |
179.80" |
166.95" |
155.82" |
146.08" |
137.49" |
129.85" |
123.02" |
116.87" |
| 32 |
268.08" |
241.27" |
219.34" |
201.06" |
185.60" |
172.34" |
160.85" |
150.80" |
141.93" |
134.04" |
126.99" |
120.64" |
| 33 |
276.46" |
248.81" |
226.19" |
207.34" |
191.40" |
177.72" |
165.88" |
155.51" |
146.36" |
138.23" |
130.95" |
124.41" |
| 34 |
284.84" |
256.35" |
233.05" |
213.63" |
197.20" |
183.11" |
170.90" |
160.22" |
150.80" |
142.42" |
134.92" |
128.18" |
| 35 |
293.22" |
263.89" |
239.90" |
219.91" |
203.00" |
188.50" |
175.93" |
164.93" |
155.23" |
146.61" |
138.89" |
131.95" |
| 36 |
301.59" |
271.43" |
246.76" |
226.19" |
208.79" |
193.88" |
180.96" |
169.65" |
159.67" |
150.80" |
142.86" |
135.72" |
| 37 |
309.97" |
278.97" |
253.61" |
232.48" |
214.59" |
199.27" |
185.98" |
174.36" |
164.10" |
154.99" |
146.83" |
139.49" |
| 38 |
318.35" |
286.51" |
260.47" |
238.76" |
220.39" |
204.65" |
191.01" |
179.07" |
168.54" |
159.17" |
150.80" |
143.26" |
| 39 |
326.73" |
294.05" |
267.32" |
245.04" |
226.19" |
210.04" |
196.04" |
183.78" |
172.97" |
163.36" |
154.76" |
147.03" |
| 40 |
335.10" |
301.59" |
274.18" |
251.33" |
231.99" |
215.42" |
201.06" |
188.50" |
177.41" |
167.55" |
158.73" |
150.80" |
| 41 |
343.48" |
309.13" |
281.03" |
257.61" |
237.79" |
220.81" |
206.09" |
193.21" |
181.84" |
171.74" |
162.70" |
154.57" |
| 42 |
351.86" |
316.67" |
287.88" |
263.89" |
243.59" |
226.19" |
211.11" |
197.92" |
186.28" |
175.93" |
166.67" |
158.34" |
| 43 |
360.24" |
324.21" |
294.74" |
270.18" |
249.39" |
231.58" |
216.14" |
202.63" |
190.71" |
180.12" |
170.64" |
162.11" |
| 44 |
368.61" |
331.75" |
301.59" |
276.46" |
255.19" |
236.97" |
221.17" |
207.34" |
195.15" |
184.31" |
174.61" |
165.88" |
| 45 |
376.99" |
339.29" |
308.45" |
282.74" |
260.99" |
242.35" |
226.19" |
212.06" |
199.58" |
188.50" |
178.57" |
169.65" |
Distance per Crank Revolution for 26" Wheel
Distance per Wheel Revolution: 81.68134"
Sweet spot is >= 167" <= 175"
| f/r |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
| 25 |
226.89" |
204.20" |
185.64" |
170.17" |
157.08" |
145.86" |
136.14" |
127.63" |
120.12" |
113.45" |
107.48" |
102.10" |
| 26 |
235.97" |
212.37" |
193.06" |
176.98" |
163.36" |
151.69" |
141.58" |
132.73" |
124.92" |
117.98" |
111.77" |
106.19" |
| 27 |
245.04" |
220.54" |
200.49" |
183.78" |
169.65" |
157.53" |
147.03" |
137.84" |
129.73" |
122.52" |
116.07" |
110.27" |
| 28 |
254.12" |
228.71" |
207.92" |
190.59" |
175.93" |
163.36" |
152.47" |
142.94" |
134.53" |
127.06" |
120.37" |
114.35" |
| 29 |
263.20" |
236.88" |
215.34" |
197.40" |
182.21" |
169.20" |
157.92" |
148.05" |
139.34" |
131.60" |
124.67" |
118.44" |
| 30 |
272.27" |
245.04" |
222.77" |
204.20" |
188.50" |
175.03" |
163.36" |
153.15" |
144.14" |
136.14" |
128.97" |
122.52" |
| 31 |
281.35" |
253.21" |
230.19" |
211.01" |
194.78" |
180.87" |
168.81" |
158.26" |
148.95" |
140.67" |
133.27" |
126.61" |
| 32 |
290.42" |
261.38" |
237.62" |
217.82" |
201.06" |
186.70" |
174.25" |
163.36" |
153.75" |
145.21" |
137.57" |
130.69" |
| 33 |
299.50" |
269.55" |
245.04" |
224.62" |
207.34" |
192.53" |
179.70" |
168.47" |
158.56" |
149.75" |
141.87" |
134.77" |
| 34 |
308.57" |
277.72" |
252.47" |
231.43" |
213.63" |
198.37" |
185.14" |
173.57" |
163.36" |
154.29" |
146.17" |
138.86" |
| 35 |
317.65" |
285.88" |
259.90" |
238.24" |
219.91" |
204.20" |
190.59" |
178.68" |
168.17" |
158.82" |
150.47" |
142.94" |
| 36 |
326.73" |
294.05" |
267.32" |
245.04" |
226.19" |
210.04" |
196.04" |
183.78" |
172.97" |
163.36" |
154.76" |
147.03" |
| 37 |
335.80" |
302.22" |
274.75" |
251.85" |
232.48" |
215.87" |
201.48" |
188.89" |
177.78" |
167.90" |
159.06" |
151.11" |
| 38 |
344.88" |
310.39" |
282.17" |
258.66" |
238.76" |
221.71" |
206.93" |
193.99" |
182.58" |
172.44" |
163.36" |
155.19" |
| 39 |
353.95" |
318.56" |
289.60" |
265.46" |
245.04" |
227.54" |
212.37" |
199.10" |
187.39" |
176.98" |
167.66" |
159.28" |
| 40 |
363.03" |
326.73" |
297.02" |
272.27" |
251.33" |
233.38" |
217.82" |
204.20" |
192.19" |
181.51" |
171.96" |
163.36" |
| 41 |
372.10" |
334.89" |
304.45" |
279.08" |
257.61" |
239.21" |
223.26" |
209.31" |
197.00" |
186.05" |
176.26" |
167.45" |
| 42 |
381.18" |
343.06" |
311.87" |
285.88" |
263.89" |
245.04" |
228.71" |
214.41" |
201.80" |
190.59" |
180.56" |
171.53" |
| 43 |
390.26" |
351.23" |
319.30" |
292.69" |
270.18" |
250.88" |
234.15" |
219.52" |
206.61" |
195.13" |
184.86" |
175.61" |
| 44 |
399.33" |
359.40" |
326.73" |
299.50" |
276.46" |
256.71" |
239.60" |
224.62" |
211.41" |
199.67" |
189.16" |
179.70" |
| 45 |
408.41" |
367.57" |
334.15" |
306.31" |
282.74" |
262.55" |
245.04" |
229.73" |
216.22" |
204.20" |
193.46" |
183.78" |
| |
| | |