Banshee Generation 2 Dropout Kit 27.5" and 29+ 12x148 Boost - Bolt On Axle - LongGeneration 2 Dropout Kit 27. 5" and 29+ 12x148 Boost Long This is the kit most commonly used for our 27. 5" models (Spitfire, Rune) with normal 27. 5 builds. This kit is also fully compatible with the 29er models if customers want to have a 10mm longer chainstay which also gives clearance for 29+ options. 12x148mm Boost hub compatible. Includes new "tooled" bolt on axle Banshee Generation 2 Dropout Kit Dropout Kit