Lewmar Bow Rollers: Fixed 66840008 vs Pivoting 66840085

A bow roller guides a boat anchor over the bow during launch and retrieval and provides a place for the anchor to rest when stowed. Lewmar makes different roller assemblies for different anchor weights and bow arrangements. The fixed 66840008 and pivoting 66840085 are both made from 304 stainless steel, but they have different channel dimensions and different Delta/DTX anchor ranges. Use the complete manufacturer number and your boat's deck geometry before choosing a replacement.

Fixed channel or pivoting roller?

Lewmar 66840008 — long channel rollerThis 304 stainless-steel roller is listed by Lewmar for 14-, 22- and 35-pound Delta and DTX anchors. The manufacturer gives a 2⅝-inch internal channel width and approximately 23 11/16 inches for the overall assembly length. Compare the existing anchor shank, bow overhang and mounting footprint before selecting it.
Lewmar 66840085 — pivoting/cantilever rollerThe pivoting model is listed for 22-, 35- and 45-pound Delta and DTX anchors. Its pivoting section assists deployment and retrieval. It has a wider, 3-inch channel and an overall length of approximately 22 11/16 inches. The pivot mechanism and deck mounting requirements differ from the fixed version.

Lewmar bow roller model and dimension chart

Exact MPN Style Listed Delta/DTX anchor weights Channel width Overall length
66840008 Fixed channel-style 14, 22 and 35 lb Delta/DTX anchors 2⅝ in (67 mm) 23 11/16 in (602 mm)
66840085 Pivoting/cantilever 22, 35 and 45 lb Delta/DTX anchors 3 in (77 mm) 22 11/16 in (577 mm)

Both models have an approximately 3⅛-inch (80 mm) outside-width dimension in Lewmar's reference chart, but that does not make their channels, bolt patterns or anchor cradle geometry interchangeable. The measurements are published product dimensions, not a universal deck cutout template. Manufacturer-listed anchor weights also do not establish suitability for every boat or every other anchor shape.

The anchor-weight ranges overlap, but are not identical. Both list 22- and 35-pound Delta/DTX anchors. Lewmar also lists a 14-pound anchor for 66840008, while the 45-pound anchor appears with 66840085. Do not assume other plow, claw, fluke or Epsilon anchors share these exact model approvals without a manufacturer fit check.

What to measure on the boat before ordering

  1. Identify the anchor. Record its brand, model, style, shank geometry and weight. Compare these details with the specific Lewmar roller application, not just the anchor's nominal weight.
  2. Measure the existing roller and deck space. Check the assembly length, channel clearance, bow overhang, mounting plate, bolt locations and the available foredeck surface. Do not drill from the outside dimensions above.
  3. Check the deployment path. Confirm the anchor can pass clear of the hull and rails without binding in the roller or hitting the bow. The pivoting model has a different movement path from a fixed channel.
  4. Plan secure stowage. Check the anchor's stowed position, any bail or securing hardware, and the vessel's chain stopper or other load-bearing restraint as specified by the boat and windlass manufacturers.
  5. Check installation hardware and deck support. Fasteners, backing plates and mounting reinforcement must suit the boat structure. Do not assume the product listing includes the complete deck-mounting hardware.
  6. Confirm the windlass and rode arrangement. Match the chain/rope lead, windlass position and anchor travel to the specific boat's instructions. A bow roller does not substitute for a properly sized anchor, chain stopper or mooring cleat.

Why the roller size is not the same as the anchor size

The roller is part of an anchoring system, not simply a tray for an anchor of a stated weight. A different shank profile or bow shape can change how an anchor deploys, rests and clears the hull even when the weight is within the manufacturer's listed range. When replacing an existing roller, identifying the complete original MPN and matching the physical installation is the most reliable starting point.

Shop the two exact Lewmar bow roller models

These cards open the matching NewRVParts products. Orders ship from supplier warehouses; the products are not available for warehouse viewing or pickup.

For full mounting dimensions and anchor-family guidance, consult Lewmar's current installation information for the exact part number before drilling or modifying the deck.

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