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Promax 451mm Mini BMX Race Wheelset-20x1 1/8" - 1
Promax 451mm Mini BMX Race Wheelset-20x1 1/8" - 2
Promax 451mm Mini BMX Race Wheelset-20x1 1/8" - 3
Promax 451mm Mini BMX Race Wheelset-20x1 1/8" - 4

Promax 451mm Mini BMX Race Wheelset-20x1 1/8"

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About This Product: Promax 451mm Mini BMX Race Wheelset-20x1 1/8"

Box 451 Focus Front Rim 20x1 1/8"

The BOX Components Focus BMX front rims feature double wall in a "BOX" style. Sleeved and Pinned with Eyelets.  Designed for front use only with minimized sidewalls to reduce weight.

SPECS
USE: Race
WORKING SIZE: 20x1 1/8"
MATERIAL: Aluminum
WIDTH: 17.8mm
HOLE COUNT: 28 hole
BEAD DIAMETER: 451mm
ERD: 438mm
TIRE FIT: 20x1", 20x1 1/8" and 20x1 3/8"
VALVE:  Presta Valve
DESIGN: Double wall, Sleeved and Pinned, Eyelets Box 451 Focus Rear Rim 20x1 1/8"

The BOX Components Focus BMX rear rims feature double wall in a "BOX" style. Sleeved and Pinned with Eyelets.  Designed for rear but can also be used as a front rim. 

SPECS
USE: Race, rear specific
WORKING SIZE: 20x1 1/8"
MATERIAL: Aluminum
WIDTH: 17.8mm
HOLE COUNT: 28 hole
BEAD DIAMETER: 451mm
ERD: 438mm
TIRE FIT: 20x1", 20x1 1/8" and 20x1 3/8"
VALVE:  Presta Valve
DESIGN: Double wall, Sleeved and Pinned, Eyelets


Promax Hubs with 10mm axle

• Hub Shells Are Cold Forged From 6061-T6 Aluminum Alloy
• Wide Shimano-Compatible Cassette Body Allows for Easy Chainline Adjustments
• Chromoly Cassette Body
• Lightweight Skewer-Style Front Axle; Chromoly Rear Axle Bolts
• 4-Pawl Cassette Body Engages Fast With Less Drag
• Available With- 24 or 28-Hole Drilling
• Includes on 10mm Cassette Space and Lock Ring
• Meets or Exceeds ENBMX Cat. 2 Standards
• Designed in USA/Made in Taiwan

Hub Dimensions:

Front Hub:
Flange Diameter: 45mm
2.65mm Spoke Holes
67.5mm Flange to Flange Width

Rear Hub:
Rt. Flange Diameter: 58mm
Lt. Flange Diameter: 53mm
2.65mm Spoke Holes
50 mm Flange to Flange Width
Rt. Flange to Center: 22.14mm
Lt. Flange to Center: 25mm


Box Rim Tape

Wheel Sizing Charts

Wheel Sizing Charts
RIDER WEIGHT RIDER AGE RECOMMENDED SIZE
RIDER WEIGHT: > 55 lbs RIDER AGE: > 5 RECOMMENDED SIZE: 18 x 1 inch
RIDER WEIGHT: 55 - 80 lbs RIDER AGE: 5 - 10 RECOMMENDED SIZE: 20 x 1.125 inch 24 x 1.125 inch
RIDER WEIGHT: 80 - 115 lbs RIDER AGE: 9 - 12 RECOMMENDED SIZE: 20 x 1.375 inch 24 x 1.375 inch
RIDER WEIGHT: 115 - 145 lbs RIDER AGE: 12 - 14 RECOMMENDED SIZE: 20 x 1.5 inch 24 x 1.5 inch
RIDER WEIGHT: 145 lbs < RIDER AGE: 14 < RECOMMENDED SIZE: 20 x 1.75 inch 24 x 1.75 inch