Brand New! Brand: Star Trac/Schwinn Part#: 000-0688 Type: Transport Wheel Assembly Dimensions: 2-3/4" Outer Dia. X 7/8" W with 3/8" Dia. hole Used on Models: AC Performance Carbon Blue (Belt Drive) AC Performance Plus AC Power 9-7300 Blade Belt 9-7240 MINTPO Blade Ion 9-7220-MINTP0 Blade Ion 9-7210 Studio 3 (9-7270) Studio 5 (9-7280).