#RK1760 is 900x60, for 900x51x60 there is a #RK2500 tag for a long time, why did this confusion suddenly start? Why erased the RK2500 tag and taken away the tag from 900x60? D:
1760 makes the main pair #RK1700 and 60 the third wheel to them; and puts #RK1600 to the background ._.