Replaces OREGON 34-204;280-646 Used on MTD Troy Bilt 38″ 42″ 46″ 54″ Decks Dimensions: 3/8″ ID; 4 7/8″ OD; 1-1/8″ Height Fits Troy Bilt 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;GTX1054, GTX2154LE, LGT1050, LGT1054, LGTX1050, LGTX1054, CC760, CC760ES, i1042, i1050, GT1054, GT2544, GT2550, GT2554, 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
Specs: 
3/8″ ID; 4 7/8″ OD; 1-1/8″ Height
Used on MTD Troy Bilt 38″ 42″ 46″ 54″ Decks
Replaces OEM #’s: 
956-04129 MTD 756-04129 MTD 756-04129B MTD 956-04129 OREGON 34-204 280-646 MTD 75604129C 12675
Fits Models: 
Troy Bilt 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
GTX1054, GTX2154LE, LGT1050, LGT1054, LGTX1050, LGTX1054, CC760, CC760ES, i1042, i1050, GT1054, GT2544, GT2550, GT2554, 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