The shear loading performance of fully grouted rock bolts is presented. A new experimental method, two types of rock bolts (D-Bolt and rebar), joint gap opening effect, and three types of host rock material were conducted. The bolts have similar loading capacity whilst the loading angle has obvious influence on the deformation capacity of the D-Bolt. The maximum total failure displacement of the D-Bolt decreases from 140 mm (0°) to 70 mm (40°, 60°, and 90°), whereas that of the rebar keeps a smooth increase from 29 to 53 mm. The deformation capacity of the D-Bolt is 270%–50%larger than that of the rebar with increasing loading angle. The bolt has a larger deformation capacity in comparatively soft rock than in hard rock. A slight increase trend of failure load with a decrease of rock strength can be observed with 90° loading angle. The bolt subjected to 60° or 90° loading is much stiffer. The total stiffness of the bolting system is contributed mainly by shear component as the stiffness in shear direction rises significantly from 20° to 90°. The displacement capacity of the bolts increased with the joint gap.