Wolf Tooth Components and Lindarets Boostinator, Rear, Industry Nine Compatible with Industry Nine Torch Classic hubs Includes non-driveside spacer, disc spacer and bolts Not compatible with Centerlock hubs Not compatible with Industry Nine 2:1-laced wheels Boostinators are hub specific conversions designed to take non-boost hubs and convert them to boost compatibility. Don't toss out that wheelset - Boostinate it.