The Answer BMX Expert 20×1.5″ rim is extruded from lightweight aluminum featuring a double-wall design with single hollow chamber, eyeleted spoke holes for increased nipple support and a pinned seam. Front rim has color matched sidewall, while rear rim has machined sidewalls to increase braking performance. ###section### Product Specs WHEEL SIZE: 20" SEAM: Pinned ERD: 378mm HEIGHT: 24.7mm WIDTH: Front - 19mm/Rear - 18.7mm SPOKE HOLES: 28H WEIGHT: Front 10.3 oz/Rear - 10 oz. Colour: Black; Size: Rear, Front