25-406 (20" x 1.75), 36 Hole Aluminum, Box Section Punched, SV Outer width 30.0 mm, Inner width 25.0 mm, Height 19.0 mm Type Article Version Box Brake Mount Hub Disc - 5-hole, Disc - 6-hole, Disc - Center Lock, Roller Brake, Drum Brake, no mount Brake Compatibility Rim universal Brake Flank yes ETRTO 25-406 Color Brake Flank silver Rim Outer Width 30 mm Rim Height 19 mm Rim Inner Width 25 mm Rim Model AS 32 For Wheel yes Main Color silver Wheel Size 20 " Spoke Hole internal punched Number of Spoke Holes 36 holes Spoke Hole Diameter for 2.00 mm Valve Type Schrader (AV) Wear Indicator no