Zipp: ALL AROUND ADVANCEMENT Zipp’s legendary speed weapon, the 404 Firecrest, is better than ever. This go-to rim-brake wheelset is, for the first time, tubeless ready. That means you can run reduced tire pressure for reduced rolling resistance and increased cornering grip and compliance without the risk of pinch flats. This wheelset’s 58mm rim depth is a classic that has carried athletes to victory in every kind of event and situation – every triathlon distance, breakaways, field sprints and hilly finishes. Zipp’s ABLC™ Sawtooth™ Technology uses a complex dimpling pattern to improve aero efficiency. Zipp’s ShowStopper™ textured braking surface delivers unrivalled rim braking performance in wet or dry conditions. At the center of the 404 Firecrest Tubeless rim-brake is a versatile and durable new hubset, the German engineered ZR1. If you had to choose just one wheel for road riding and racing, the 404 Firecrest Tubeless is a savvy and speedy choice.FEATURESNew Zipp graphics and cosmetic identity that scream speedNew ZR1 hub is engineered in Germany with better seal design for improved durability and quicker response with 66 points of engagementBuilt with Sapim CX Sprint J-bend spokesTubeless ensuring secure performance even when ridden at lower tire pressuresAll-around aero 58mm rim depth with proven crosswind stabilityABLC Sawtooth™ dimple design helps manage air flow around the rim, and contributes to create a faster, more stable wheelShowstopper™ textured brake track delivers superior modulation and shortest stopping distances in wet and dry conditionsXDR™ or SRAM/Shimano driver bodiesShips with QR end caps, quick release skewersCampagnolo driver body sold separately SPECIFICATIONSOrientation (wheels): RearSize (wheels): 700cRim construction: CarbonTire compatibility: Clincher Tubeless ReadyRim depth: 58mmSurface texture: ABLC SawToothBrake compatibility: RimRim - inside width: 19mmRim profile: SymmetricalRim finish: UD fiber, adhesive decalsColor (Decal): StandardNipple material: AluminumNipple anti-rotation: Sapim Secure-LocSpoke type: CX-Ray - BlackSpoke count: 24Spoke pattern: 2 CrossHub: ZR1 Disc BrakeDriver body type: SRAM XDRColor (hub): BlackAxle type (Wheels): QR 135Axle material: Aluminum front & rearBearings: Cartridge - SteelDriver Mechanism: 6 Pawls Leaf SpringDriver body material: AluminumMax tire pressure: 125psiMax recommended rider weight: 250lbs