Colson 3.5" Per Forma, Wt. Rating 250 lbs. per caster.  Adds 5.5" to case height including casterboard. Brakes lock both swivel and wheel.

Colson 4" Hi Tech, Wt. Rating 600 lbs. per caster.  Adds 6.5" to case height including casterboard.  Brakes lock both swivel and wheel.

Jan-Al can also offer a 3.5" Hi-Tech, Wt. Rating  is 250 lbs.  Adds 5.5" to case height including casterboard

Fallshaw 4" x 1.25",  Wt. Rating 240 lbs. per caster.  Adds 6" to case height including casterboard.  Brakes lock both swivel and wheel.

Albion 4"x 2",  Wt. Rating 700 lbs. per caster.  Adds 6.5" to case height including casterboard.  Side lock brakes, wheel only (very large).

Carefree casters come in 6" & 8" with & without brakes.  Looks like a pneumatic but never needs air.  Side lock brakes for the wheel only. This style wheel is for rolling over cable or in outdoor applications.

Balloon casters are also carefree.  Standard size is 6".  This caster is ideal for use in gravel, ice, mud, grass and cable.  Should not be used with very tall cases.

RHINORACER CASTERS

Edge casters (left) and Recessed casters (right) are used with telescoping handles.  These handy casters take up  3" inside a case.  The overall weight of these casters is less than standard casters and casterboards.