2 Idler Pulley 38"-54" fits Troy Bilt Pony Bronco Super Bronco HorseTwo New Aftermarket Replacement Flat Idler Pulleys Fits Troy Bilt Models: GT50, GT54, RZT 42, RZT 50, TB42, TB2142, TB2246, TB2450, Pony, Bronco, Super Bronco, Horse, Big Red Horse, Range Rider, Mustang, Mustang XP, Colt XP Fits Cub Cadet Models: RZT L50, RZT L54, RZT S42, RZT S46, RZT S50, RZT S54, SLTX1550, SLTX1054, LT1040, LTX1040, LTX1042, LTX1050, RZT42, RZT50, RZT54, RZT L42, RZT L 46 Specifications: Inside Diameter: 3 8" Outside Diameter: 4 7