The Calle rim uses proprietary high strength aluminum alloy and a specially designed internal spoke seat to create Shadow's strongest rim yet. This durable and sturdy rim is designed to take the abuse whether you run high pressure or super low pressure. ###section### Product Specs WHEEL SIZE: 20" SEAM: Welded ERD: TBC HEIGHT: 18.5mm WIDTH: 36mm SPOKE HOLES: 36h WEIGHT: 493g / 17.4oz Colour: Black, Crimson Rain, Raw, Skeletor Purple