55 Franklin St. Rt. 20, Westfield, MA    413-562-5237        
Hours
Monday, Tuesday, Wednesday 10:00-5:30 Thursday 10:00-7:00 Friday 10:00-5:30
Saturday 10:00-4:00 Sunday Closed
 
 
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BMX Frame Sizing

To be competitive proper sizing is important. BMX sizing is referred to by names and a top tube length. In addition to the frame size wheel sizes also vary. The Micro Mini and Mini sizes will have 20 x 1 1/8" tires, Junior and Expert models 20 x 1 3/8", and Pro series 20 x 1.75.

Rider HeightRider Age (Avg.)Rider WeightFrame SizeTop Tube LengthTire Size
 3' 8" & under 5 & under <60 lbs. Micro Mini < 18" 18"
 3' 8" to 4' 6" 5 to 7 up to 75 lbs. Mini 18" 1 1/8"
 4' 5" to 4' 10" 8 to 10 up to 110 lbs. Junior 18" to 18.5" 1 3/8"
 4' 5" to 5' 2" 10 to 13 up to 130 lbs. Expert 19" to 19.5" 1 3/8"
 4' 8" to 5' 5" 10 to 13 up to 150 lbs. Expert XL 19.5" to 20" 1.5"
 5' 6" to 5' 10" 13 & over any Pro 20.5" to 21" 1.75"
  5' 8" to 6' 13 & over any Pro XL 21" to 21.5" 1.75"
  5' 10" + 13 & over any Pro XXl 21.5" + 1.75"
Cruisers     
 4' 5" to 4' 11" 8 to 11 up to 130 lbs. Junior  1 3/8"
 4' 8" to 5' 7" 10 to 13 up to 160 lbs. Expert  1 3/8"
 5' 5" + any any Pro  1.75"