Title(en): drive belt type 669x18x30 size 669 18 30 for 139QMB, QMA 10. drive belt type 669x18x30 size 669 18 30 for 139QMB, QMA 10. Baotian: Tiger, Ecobike, BT50QT-11, BT49QT-6A1, BT49QT-12G, Retro, Warrior/Retro, BT49QT-10, BT49QT-9D1, Smart Rider, BT49QT-11, BT49QT-12P2, BT49QT-9R1, BT49QT-9O3, BT49QT-9F1, BT49QT-20A, BT49QT-12E, BT49QT-9S3, BT49QT-9F3, BT50QT-9, Eagle, BT49QT-7A, BT49QT-12J, BT49QT-6B1, Sprint, BT49QT-9S1, BT49QT-9R3, BT49QT-9N3, Rocky, BT49QT-6B4, BT50QT-7, BT49QT-12, BT49QT-6A4, BT49QT-9, BT49QT-2, Speedy, BT49QT-7B, BT49QT-3, BT49QT-20B2, BT49QT-12G1, Moto/City.
