Average gradeability of 208 driven forklifts I have details on is 20%.
Only one's limited to 10% are TCM brand units.
Out of the 177 forklifts I have gradeability data on, 6 TCM units have a limit of 10%, another 13 had limits of 12% - 14.3%, another 11 have limits of 15% - 19%, and all the others have capabilities of 20% or more.