Dear Sir and Madam, Good day!We are a Chinese inner tube and flap manufacturer, and we made some moulds for Truck Radial Tyres at one of tyre factories who buy tubes and flaps from our company. The size is 900R20, 1000R20, 1100R20 and 1200R20.If you are interested in any one of them, please do not hesitate to let me know. Please contact me at: klampt_rainbow (a) yahoo dot com dot cnHope to establish a good business relationship with you. Best regards,Rainbow