Replacing a worn trailer roller starts with recognizing its shape: a bell assembly at the bow, a straight keel-support roller, a waisted spool or a compact bow roller. Use the measurements below to identify C.E. Smith parts without assuming that similar black rollers fit the same shaft.

Identify the part by dimensions

Measurements are manufacturer figures in inches. Width and outside diameter are different dimensions, and neither is a substitute for shaft-bore measurement.

MPN Roller style Nominal size/application Roller/assembly width Outside diameter Shaft size
29334 PVC bow-bell assembly Fits a 3-in centre bracket 6 in 4-1/8 in 1/2 in
29335 PVC bow-bell assembly Fits a 4-in centre bracket 8 in 5-1/4 in 1/2 in
29500 Keel roller Nominal 12-in roller 11-3/4 in 3-1/2 in 5/8 in
29502 Keel roller Nominal 8-in roller 7-7/8 in 3-3/8 in 5/8 in
29522 Spool roller Nominal 5-in roller 4-7/8 in 3 in 5/8 in
29541 Bow roller Nominal 4-in roller 3-3/4 in 3-1/2 in 1/2 in
What's included? The bow-bell parts 29334 and 29335 are assemblies with 1/2-inch shafts. For keel, spool and stand-alone bow rollers, check the exact product listing and supplier package to confirm whether a separate shaft is required. Shaft fit is a size specification, not proof that a shaft is in the package.

How to identify a missing or worn roller

If the original package is gone, note the axle-bore diameter and measure the roller's body width, outer diameter and bracket opening. A nominal size can refer to the bracket it fits rather than the assembly's overall width.

  • Keel rollers: the 29500 and 29502 use 5/8-inch shafts but have different widths; do not substitute by diameter alone.
  • Bow-bell assemblies: the yellow PVC 29334 fits a 3-inch centre bracket, while 29335 fits a 4-inch centre bracket.
  • Spool versus bow: part 29522 is a 5-inch nominal spool roller for a 5/8-inch shaft; 29541 is a compact bow roller with a 1/2-inch shaft size.

Check exact manufacturer numbers

Choose a card to see the corresponding catalog record and its stated condition and availability. Product viewing and pickup in Kelowna are by appointment.

For separate shafts, retention hardware and replacement brackets, see our C.E. Smith mounting hardware identification guide.

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