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| BMX Rider Bike Sizing |
| RIDER HEIGHT |
FRAME SIZE |
TOP TUBE LENGTH |
STEM LENGTH |
BAR RISE |
BAR WIDTH |
CRANK LENGTH |
GEARING |
| 4'0" & under |
Micro-Mini |
15"-16" |
Mini |
2"-2.5" |
20"-22.5" |
150-160mm |
41-43/16 |
| 4'0"-4'6" |
Mini |
16"-17" |
Mini-Mini XL |
2"-3.5" |
21"-23.5" |
155-165mm |
41-43/16 |
| 4'4"-4'10" |
Junior |
17"-18.5" |
Mini XL-Pro |
3"-5" |
22"-25" |
160-175mm |
42-43/16 |
| 4'8"-5'4" |
Expert |
18.5"-19.5" |
Pro |
5"-7" |
25.5"-27" |
170-175mm |
42-43/16 |
| 5'4"-5'10" |
Pro |
20"-20.5" |
Pro-Pro XL |
7"-8" |
27"-28" |
175-180mm |
43-44/16 |
| 5'10" & over |
Pro XL or Pro XXL |
20.5" & over |
Pro XL-Pro XXL |
7"-8" |
28" |
180-185mm |
44/16 & over |
| Crank Arm Length |
| Inseam |
20 in. |
21 in. |
22 in. |
23 in. |
24 in. |
25 in. |
26 in. |
| Crank |
140mm |
145mm |
150mm |
155mm |
160mm |
162mm |
166mm |
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| Inseam |
27 in. |
28 in. |
29 in. |
30 in. |
31 in. |
32 in. |
34 in. |
| Crank |
171mm |
175mm |
177mm |
180mm |
182mm |
185mm |
190mm |
Gearing Charts
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