C.E. Smith 29334
A yellow non-marking bow-bell assembly. The manufacturer specifies an included shaft.
C.E. Smith Boat Trailer Rollers: Keel, Bow Bell & Spool Sizes
A boat trailer may use several different rollers. Keel rollers support the hull along the centreline, bow-bell assemblies help position the bow at the stop, and spool rollers and compact bow rollers suit different contact points. This C.E. Smith chart brings the key sizes together by exact manufacturer part number.
Keel, bow and spool roller size chart
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.
Measurements before ordering
Take four measurements from the existing trailer before selecting a roller: roller body width, maximum diameter, shaft diameter and the clear space between bracket arms. On bow-bell assemblies, the nominal 3-inch or 4-inch designation is the centre-bracket size, not the assembly's full 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.
Find the matching roller
Select a matching part number for its detailed listing and current online availability.
C.E. Smith 29500
The larger keel roller. Compare the shaft separately with the matching bracket.
C.E. Smith 29502
A shorter keel-support roller. Match both its width and five-eighths-inch bore.
C.E. Smith 29522
A waisted spool shape often used where a shorter roller sits in a support bracket.
C.E. Smith 29541
A compact black bow roller rather than a multi-piece bow-bell assembly.
Roller shafts and support brackets
Need a replacement shaft, cap nuts or a complete bracket assembly? Use our C.E. Smith roller mounting hardware guide.
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