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Contact

Rockford BMX

4950 Safford Rd.

Rockford, Illinois 61101

(815) 874-8719

 

Email

candybmx@aol.com

 

 

Social

Information

Gearing Charts

Rider Height Frame Size Top Tube Length Stem Length Bar Rise Bar Width
4’0" & Under Micro-Mini 15"-15.5" Mini 2"-2.5" 20"-21.5"
4’4"-4’10" Mini 15.5"-16.5" Mini-Mini XL 2"-3.5" 21"-23"
4’4"-4’10" Junior 16"-17.5" Mini-Mini XL 3"-4.5" 22"-24.5"
4’8"-5’4" Expert 17"-18.5" Pro 4.5"-6" 24"-26"
5’2"-5’10" Expert XL 18"-19" Pro 6"-7.5" 26"-27"
5’6"-5’10" Pro 18.5"-19.5" Pro-Pro XL 7"-8" 27"-28"
5’10"-6’1" Pro XXL 19"-21" Pro-Pro XL 7"-8" 27"-28"
6′ & Over Pro XXL 20.5" & Over Pro XL-Pro XXL 7"-8" 28"+

 

Cranks

Riders Inseam 20" 21" 22" 23" 24" 25" 26"
Crank Length 140mm 145mm 150mm 155mm 160mm 162mm 166mm
Riders Inseam 27" 28" 29" 30" 31" 32" 34"
Crank Length 171mm 175mm 177mm 180mm 182mm 185mm 190mm

 

20" X 1.75" GEAR CHART

Chain wheels 34 35 36 37 38 39 40 41 42 43 44 45 46
Freewheel 14 47.4 48.7 50.2 51.6 53.0 54.4 55.7 57.1 58.5 59.9 61.9 62.7 64.1
Freewheel 15 44.3 45.4 46.0 48.1 49.4 50.7 52.0 53.3 54.6 55.9 57.2 58.5 59.8
Freewheel 16 41.5 42.7 43.6 45.1 46.3 47.5 48.8 50.0 51.2 52.4 53.7 54.9 56.1
Freewheel 17 39.0 40.2 41.3 42.5 43.6 44.7 45.9 47.0 48.2 49.4 50.5 51.7 52.8
Freewheel 18 36.8 37.8 39.0 40.1 41.2 42.3 43.3 44.4 45.5 46.6 47.7 48.8 49.9

 

20" X 1.50" GEAR CHART

Chain wheels 34 35 36 37 38 39 40 41 42 43 44 45 46
Freewheel 14 46.8 48.1 49.5 50.9 52.3 53.6 55.0 56.4 57.5 59.1 60.5 61.8 63.2
Freewheel 15 43.6 44.9 46.2 47.4 48.8 50.1 51.3 52.8 53.9 55.2 56.5 57.7 59.1
Freewheel 16 40.9 42.1 43.3 44.5 45.7 46.9 48.1 49.3 50.5 51.7 52.9 54.1 55.3
Freewheel 17 38.5 39.6 40.8 41.9 43.1 44.1 45.2 46.4 47.5 48.7 49.8 51.0 52.2
Freewheel 18 36.4 37.4 38.5 39.6 40.6 41.7 42.8 43.9 44.9 46.0 47.0 48.1 49.2

 

20" x 1 3/8" GEAR CHART

Chain wheels 34 35 36 37 38 39 40 41 42 43 44 45 46
Freewheel 14 51.0 52.5 54.0 55.5 57.0 58.5 60.0 61.5 63.0 64.5 66.0 67.5 69.0
Freewheel 15 47.6 49.0 50.4 51.6 53.2 54.6 56.0 57.4 58.8 60.2 61.6 63.0 64.4
Freewheel 16 44.6 45.9 47.3 48.6 49.9 51.2 52.5 53.9 55.2 56.5 57.8 59.1 60.4
Freewheel 17 42.0 43.2 44.5 45.7 47.0 48.2 49.4 50.7 51.9 53.2 54.4 55.6 56.9
Freewheel 18 39.7 40.7 42.0 43.2 44.4 45.5 46.7 47.9 49.0 50.2 51.4 52.5 53.7

 

20" X 1 1/8" GEAR CHART

Chain wheels 34 35 36 37 38 39 40 41 42 43 44 45 46
Freewheel 14 48.6 50.0 51.4 52.8 54.3 55.7 57.1 58.6 60.0 61.4 62.8 64.3 65.7
Freewheel 15 45.3 46.7 48.0 49.3 50.7 52.0 53.3 54.7 56.0 57.3 58.7 60.0 61.3
Freewheel 16 42.5 43.8 45.0 46.2 47.5 48.7 50.0 51.2 52.5 53.7 55.0 56.2 57.5
Freewheel 17 40.0 41.2 42.3 43.5 44.7 45.9 47.0 48.2 49.4 50.6 51.8 52.9 54.1
Freewheel 18 37.7 38.8 40.0 41.1 42.2 43.3 44.4 45.6 46.7 47.8 48.9 50.0 51.1

 

24" X 1.75" GEAR CHART

Chain wheels 34 35 36 37 38 39 40 41 42 43 44 45 46
Freewheel 14 58.3 60.0 61.7 63.3 65.0 66.9 68.6 70.3 72.0 73.7 75.3 77.0 78.9
Freewheel 15 54.4 56.0 57.6 59.3 60.7 62.4 64.1 65.5 67.2 68.9 70.3 72.0 73.7
Freewheel 16 51.0 52.5 54.0 55.5 57.0 58.5 60.0 61.4 63.1 64.5 66.0 67.4 69.1
Freewheel 17 48.0 49.4 50.0 52.2 53.6 55.1 56.5 57.9 59.3 60.7 62.1 63.6 65.0
Freewheel 18 45.3 46.5 48.0 49.4 50.7 52.0 53.3 54.7 56.0 57.3 58.5 60.0 61.4

 

24" X 1.50" GEAR CHART

Chain wheels 34 35 36 37 38 39 40 41 42 43 44 45 46
Freewheel 14 55.9 57.5 59.1 60.7 62.3 64.2 65.8 67.4 69.0 70.6 72.2 73.8 75.7
Freewheel 15 52.1 53.7 55.2 56.7 58.2 59.8 61.3 62.8 64.4 65.9 67.4 69.0 70.6
Freewheel 16 48.4 50.3 51.8 53.2 54.6 56.0 57.5 58.9 60.3 61.8 63.2 64.6 66.2
Freewheel 17 46.0 47.3 48.7 50.0 51.4 52.8 54.1 55.5 56.8 58.8 59.5 60.8 62.3
Freewheel 18 43.4 44.7 46.0 47.2 48.5 49.8 51.1 52.4 53.7 54.9 56.2 57.5 58.9

 

24" X 1 3/8" GEAR CHART

Chain wheels 34 35 36 37 38 39 40 41 42 43 44 45 46
Freewheel 14 58.3 60.0 61.7 63.3 65.0 66.9 68.6 70.3 72.0 73.7 75.3 77.0 78.9
Freewheel 15 54.4 56.0 57.6 59.3 60.7 62.4 64.1 65.5 67.2 68.9 71.3 72.0 73.7
Freewheel 16 51.1 52.5 54.0 55.5 57.0 58.5 60.0 61.4 63.1 64.5 66.0 67.4 69.1
Freewheel 17 48.0 49.4 50.8 52.2 53.6 55.1 56.5 57.9 59.3 60.7 62.1 63.3 65.0
Freewheel 18 45.3 46.5 48.0 49.4 50.7 52.0 53.3 54.7 56.0 57.3 58.5 60.0 61.4

 

24" X 1 1/8" GEAR CHART

Chain wheels 34 35 36 37 38 39 40 41 42 43 44 45 46
Freewheel 14 54.9 56.5 58.1 59.7 61.3 63.1 64.7 66.3 67.9 69.4 71.0 72.6 74.4
Freewheel 15 51.3 52.8 54.3 55.8 57.3 58.8 60.3 61.8 63.3 64.9 66.3 67.9 69.4
Freewheel 16 48.1 49.5 50.9 52.3 53.7 55.1 56.6 57.9 59.5 60.8 62.2 63.9 65.1
Freewheel 17 45.2 46.6 47.9 49.3 50.6 51.9 53.2 54.6 55.9 57.2 58.6 59.9 61.3
Freewheel 18 42.7 43.9 45.2 46.6 47.7 49.1 50.3 51.5 52.8 54.0 55.3 56.6 57.9