Close Ratio Sets

1 products

Our Close Ratio Sets for Harley-Davidson range is built around Andrews transmission components, the go-to name for upgraded gearsets on 1941–1976 Big Twin four-speed loose-roller gearboxes. Close ratio sets tighten the gap between gears, helping riders keep the engine in its power band whether they are cruising on a classic Shovelhead, building a performance Panhead or restoring a Knucklehead-era Big Twin. Iron Stable is run by Iron City Motorcycles, the authorised Harley-Davidson dealer in Leeds, so every transmission part we list is sourced through proper Harley-Davidson trade channels. Andrews is recognised across the custom and vintage Harley-Davidson world for precision-cut gears that deliver smoother shifts and improved drivability. If you are rebuilding a classic four-speed or upgrading a custom chassis, a close ratio set transforms how your bike feels on the road. Browse the full range below.