Firstly, i can confrim that a TT motorcycle tire must use a inner tube,and a TL motorcycle tire can use a inner tube and also can not use a inner tube. Wheather to use a inner tube is decided by the structure of the tire. TL tire has the sealing layer,and the air can’t get away from the tire, so no need to use the inner tube, but if you use a inner tube is ok,the tire can work, no problem. But if don’t use inner tube in a TT tire,then the tire can onlyl work for a short time, because the air will get away.