The Crest MK4 combines the heritage of Stan's legendary tubeless design with today's best materials and a stronger asymmetric design. The BST Asymmetric rim design allows for a stronger wheel while offering the easy inflation and Stan's trademark unmatched airtight seal. The Crest MK4 rim is optimized for 40mm Gravel tires and up to 2.3" mountain tires, making it a great, versatile choice for a wide range of bikes and riding styles.25mm rim width optimized for Gravel and XC tires up to 2.3 Light and durable 6069 aluminum with welded joint and reinforced spoke bedBST Asymmetric design combines Stan s legendary easy tubeless inflation with a stronger, more balanced wheel build3-year rim warranty with 1-year crash replacementItem SpecificationsBrake CompatibilityDisc OnlyBrake TrackNoneColorBlackDefined ColorGrayEyeletsNoneHub Drilling32ISO Diameter622 / Road / 29"Manufacturer Spec ERD (mm)601Rim Center Offset (mm)1.5Rim Depth (mm)18Rim JointWeldedRim MaterialAlloyRim Width (External)28.4Rim Width (Internal)25Tire TypeTubeless ReadyValve LengthShort 32-40mmValvePrestaWeight399Wheel Size29" Stan's No Tubes Crest MK4 Rim Rims UPC: 847746058397