Reynolds Bl327 Trail Expert 27.5´´ Boost Cl Disc Tubeless Mtb Wheel Set. The Reynolds Black Label 327 Expert 148mm Wheelset typically ships in 5-8 business days.The Reynolds Blacklabel 327 Expert 148mm Wheelset is a trail-focused carbon wheel built for 27.5´´ mountain bikes — the middle tier in Reynolds´ Blacklabel lineup, positioned above the CR3-construction TR series and below the flagship Pro with its Industry Nine Hydra hubs.The rim construction technology is shared across the entire Blacklabel family, which means the Expert doesn´t compromise where it matters most.Trail riding at this level demands a rim that´s genuinely light enough to accelerate quickly and durable enough to absorb rock strikes and hard landings.The 327 Expert is built for that combination, and Reynolds backs it with a lifetime warranty.The material is IDM — Impact Dispersing Matrix — a combination of high-quality carbon fiber and a proprietary resin engineered to diffuse impact energy before it can damage the rim structure.Where a conventional carbon layup concentrates a hard strike at the point of contact, IDM distributes that energy outward through the composite, converting it before it can initiate a crack.Reynolds developed this technology on the World Cup DH and EWS enduro circuits, where a rim failure doesn´t just end a run — it ends a race season.The Expert tier carries the same IDM construction as the flagship Pro. tradeinn Bikeinn