-The AC-2 hubs use 20mm Angular Contact bearings with a wave spring pre-load

An understated

the same as handlebars

Aluminum cone spacers and spare washers

Though being an entry level bike it's spec'd with parts usually seen on mid to pro range level bikes

S&M Passero Signature Whammo V2 Frame Size:20.5" -The AC-2 hubs use 20mmWith a shorter back end (12. 9"), taller headtube (5") and raised bottom bracket (11. 8"), the Whammo V. 2 will have you shouting Wham Bam, thank you Man! The taller headtube (ie. less spacers) translates into a cleaner setup, the shorter back end makes it more responsive and the higher bottom bracket improves sprocket clearance when grinding. The rest? Tried and true from the first Whammo. ###section### Product Specs MATERIAL: Chromoly ThermalX