Crown Material: 6061-T6 alloy, flash welded. Size: 38mm x 19mm, 387mm ERD, 36h only. Heavy-duty rim for the most brutal riders in the game. The strongest rim Eclat's ever made, seriously…. x5 chamber construction and unique super tall outer wall for maximum stiffness. Increased material thickness in critical areas. Straight side walls for brake use. Does not require kitchenware to install tires. Weight: 580g / 20.4oz. Item Specifications: Manufacturer Spec ERD (mm): 387, Defined Color: Black, Rim Construction: Aluminum - Welded, Wheel Depth: 19mm, Hub Drilling: 36, Requires Eyelets: No, Rim Material: Aluminum, Raw Product Weight Grams: 580g, Brake Caliper Type: Rim, Tire Type: Clincher, Valve: Schrader, Wheel Size: 20'', Minimum Wheel Diameter: 20'' / 406,