You can fit four 45lb bumpers and collars on each side of a typical bar for a 405lb maximum load. This will depend on the sleeve length of the given bar. See bumper thicknesses below.
In 2012, Troy redesigned the hub of the 10lb bumpers to be larger and hold up even better than before. The 10lb bumpers are thin by nature and are not guaranteed by Troy to hold up to dropping by themselves, but they are very stiff, and we have found them to one of the sturdiest 10lb bumpers anywhere (as well as the larger sizes).
|10 lb||17.72" (450mm)||1" (25mm)|
|25 lb||17.72" (450mm)||2" (51mm)|
|35 lb||17.72" (450mm)||2.36" (60mm)|
|45 lb||17.72" (450mm)||3.11" (79mm)|
|Fit||Snug (about 51mm / 2")|