CE Smith Trailer 29515 Heavy Duty 5"-5/8" ID Keel Roller,BlackCE Smith 29515, keel roller heavy duty 5" - 5/8" ID - natural black rubber W/Bushing. 5" keel roller. Black natural rubber rollers are original equipment on many Trailers. Fits standard brackets and shaft sizes. This is a heavy-duty roller.Features of CE Smith Trailer 29515 Heavy Duty 5"..