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BMX Sizing Charts
Frame & Component Sizing
| RIDER HEIGHT |
FRAME SIZE |
TOP TUBE LENGTH |
STEM LENGTH |
BAR RISE |
BAR WIDTH |
CRANK LENGTH |
GEARING |
| 4'0" & Under |
Micro-Mini |
15"-16" |
0-35mm |
2"-2.5" |
20"-22.5" |
150-160mm |
41-43F/16R |
| 4'0"-4'6" |
Mini |
16"-17" |
35-45mm |
2"-3.5" |
21"-23.5" |
155-165mm |
41-43F/16R |
| 4'4"-4'10" |
Junior |
17"-18.5" |
45-46mm |
3"-5" |
22"-25" |
160-175mm |
42-43F/16R |
| 4'8"-5'4" |
Expert |
18.5"-19.5" |
46mm |
5"-7" |
25.5"-27" |
170-175mm |
42-43F/16R |
| 5'4"-5'10" |
Pro |
20"-20.5" |
46-52mm |
7"-8" |
27"-28" |
175-180mm |
43-44F/16R |
| 5'10" & Over |
Pro XL & XXL |
20.5" & Over |
52-60mm |
7"-8" |
28" |
180-185mm |
44F/16R & Up |
Rim Sizing
| RIDER WEIGHT |
RIM SIZE |
| 50-90 Pounds |
20"/24" x 1-1/8" |
| 85-120 Pounds |
20"/24" x 1-3/8" |
| 115-150 Pounds |
20"/24" x 1.5" |
| 140 Pounds & Above |
20"/24" x 1.75" |
Crank Sizing
| INSEAM LENGTH |
<19" |
20" |
21" |
22" |
23" |
24" |
26" |
27" |
28"-29" |
30"-31" |
| CRANK LENGTH |
135mm |
140mm |
145mm |
150mm |
155mm |
160mm |
165mm |
170mm |
175mm |
180mm |
Helmet Sizing
To determine your hat size, measure your head about 1/2" above your brow in cm and refer to the chart.
| HAT SIZE |
6-1/4" |
6-3/8" |
6-1/2" |
6-5/8" |
6-11/16" |
6-3/4" |
6-3/4" |
7" |
7-1/8" |
7-1/4" |
7-3/8" |
7-1/2" |
7-5/8" |
7-3/4" |
7-7/8" |
8 |
8-1/4" |
8-1/4" |
8-3/8" |
| HEAD CIRCUMFERENCE-METRIC cm |
50 |
51 |
52 |
53 |
53.5 |
54 |
55 |
56 |
57 |
58 |
59 |
60 |
61 |
62 |
63 |
64 |
65 |
66 |
67 |
FLY/GMAX/THH HELMETS
| |
4XS/YS |
3XS/YM |
2XS/YL |
XS |
S |
M |
L |
XL |
2XL |
3XL |
| FLY |
6 |
6-1/8~6-1/4 |
6-3/8~6-1/2 |
6-5/8~6-3/4 |
6-7/8~7 |
7-1/8~7-1/4 |
7-3/8~7-1/2 |
7-5/8~7-3/4 |
7-7/8~8 |
- |
| GMAX |
6/1/2008 |
6-1/4~6-3/8 |
6-1/2~6-5/8 |
6-3/4~6-7/8 |
7~7-1/8 |
7-1/4~7-3/8 |
7-1/2~7-5/8 |
7-3/4~7-7/8 |
8~8-1/8 |
8/1/2004 |
| THH |
6-1/8~6-1/4 |
- |
6-3/8~6-1/2 |
6-5/8~6-3/4 |
6-7/8~7 |
7-1/8~7-1/4 |
7-3/8~7-1/2 |
7-5/8~7-3/4 |
7-7/8~8 |
- |
Youth Jersey Sizing
| YXS |
4 - 6 |
| YS |
8 - 10 |
| YM |
12 - 18 |
| YL |
20-22 |
Youth Pant Sizing
| 18 |
2 - 3 |
| 20 |
4 - 5 |
| 22 |
5 - 6 |
| 24 |
8 - 10 |
| 26 |
12 - 14 |
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