GVL stands for gravel, and Greenville, SC where Boyd wheels are handbuilt. Prologue series wheels are built Skyuka hubs featuring 10-degree engagement and Abec 3 sealed cartridge bearings. Built with Pillar TB2018 round double butted spokes and external brass nipples, the Prologue is built to be a great budget upgrade that can be ridden hard in even the most demanding conditions. Attributes Axle Type 12mm TA Depth 28mm Freehub Body SRAM XD-R Hub Model Skyuka Hub Spacing 142mm Position Rear Rim Color Black Rim Construction Double wall Rim Drilling 28 Rim External Width 30mm Rim inner width range 0-21.9mm Rim Internal Width 25mm Rim Material Aluminum Skewers Included No Spoke Type Pillar TB2018 Valve Presta Wheel Diameter/ISO 700C / 622 Wheel Tire Type Tubeless Compatible Wheel Weight 980g Wheel-Brake Comp. Disc Center Lock
