![manutec-1500x1500](https://www.rhsboating.com.au/images/com_hikashop/upload/manutec-1500x1500.jpg)  Description:
Support your trailer maintenance with Manutec jockey wheels and replacement wheel components from RHS Boating & Marine. Browse selected standard, swivel-clamp and sidewinder arrangements, with solid rubber and pneumatic wheel options across the range.

Choosing a jockey wheel involves checking the trailer's mounting space, required support capacity and the surfaces where it will be used. Compare clamp type, wheel dimensions, available extension and rated load rather than selecting by appearance alone. For a replacement wheel, confirm the axle and hub dimensions as well as the diameter. Explore the Manutec product specifications to find an assembly or service part that matches your boat trailer's existing setup.

           [ ![RWB4132](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/RWB4132.jpg "Nairn Inspection Port Replacement Lid - Clear - 100mm (4 inches)") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-clear-100mm-4-inches.html)

   $12.30  each    [ Nairn Inspection Port Replacement Lid - Clear - 100mm (4 inches) ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-clear-100mm-4-inches.html)      [ RWB4132 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-clear-100mm-4-inches.html)

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   [ ![RWB4135](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/RWB4135.jpg "Nairn Inspection Port Replacement Lid - Clear - 125mm (5 inches)") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-clear-125mm-5-inches.html)

   $14.76  each    [ Nairn Inspection Port Replacement Lid - Clear - 125mm (5 inches) ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-clear-125mm-5-inches.html)      [ RWB4135 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-clear-125mm-5-inches.html)

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   [ ![RWB4138](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/RWB4138.jpg "Nairn Inspection Port Replacement Lid - Clear - 150mm (6 inches)") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-clear-150mm-6-inches.html)

   $17.44  each    [ Nairn Inspection Port Replacement Lid - Clear - 150mm (6 inches) ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-clear-150mm-6-inches.html)      [ RWB4138 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-clear-150mm-6-inches.html)

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   [ ![RWB4131](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Inspection Port Replacement Lid - White - 100mm (4 inches)") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-white-100mm-4-inches.html)

   $10.86  each    [ Nairn Inspection Port Replacement Lid - White - 100mm (4 inches) ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-white-100mm-4-inches.html)      [ RWB4131 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-white-100mm-4-inches.html)

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   [ ![RWB4134](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Inspection Port Replacement Lid - White - 125mm (5 inches)") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-white-125mm-5-inches.html)

   $12.65  each    [ Nairn Inspection Port Replacement Lid - White - 125mm (5 inches) ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-white-125mm-5-inches.html)      [ RWB4134 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-white-125mm-5-inches.html)

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   [ ![RWB4137](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Inspection Port Replacement Lid - White - 150mm (6 inches)") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-white-150mm-6-inches.html)

   $15.04  each    [ Nairn Inspection Port Replacement Lid - White - 150mm (6 inches) ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-white-150mm-6-inches.html)      [ RWB4137 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-white-150mm-6-inches.html)

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   [ ![RWB4108](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/RWB4108.jpg "Nairn Inspection Port with Kit Bag - All black - 125mm (5 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-all-black-125mm-5-inches-opening.html)

   $56.82  each    [ Nairn Inspection Port with Kit Bag - All black - 125mm (5 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-all-black-125mm-5-inches-opening.html)      [ RWB4108 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-all-black-125mm-5-inches-opening.html)

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   [ ![RWB4116](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/RWB4116.jpg "Nairn Inspection Port with Kit Bag - All black - 150mm (6 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-all-black-150mm-6-inches-opening.html)

   $62.55  each    [ Nairn Inspection Port with Kit Bag - All black - 150mm (6 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-all-black-150mm-6-inches-opening.html)      [ RWB4116 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-all-black-150mm-6-inches-opening.html)

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   [ ![RWB4109](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Inspection Port with Kit Bag - All white - 125mm (5 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-all-white-125mm-5-inches-opening.html)

   $56.82  each    [ Nairn Inspection Port with Kit Bag - All white - 125mm (5 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-all-white-125mm-5-inches-opening.html)      [ RWB4109 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-all-white-125mm-5-inches-opening.html)

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   [ ![RWB4117](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Inspection Port with Kit Bag - All white - 150mm (6 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-all-white-150mm-6-inches-opening.html)

   $62.55  each    [ Nairn Inspection Port with Kit Bag - All white - 150mm (6 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-all-white-150mm-6-inches-opening.html)      [ RWB4117 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-all-white-150mm-6-inches-opening.html)

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   [ ![RWB4110](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Inspection Port with Kit Bag - Black with clear lid - 125mm (5 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-black-with-clear-lid-125mm-5-inches-opening.html)

   $60.24  each    [ Nairn Inspection Port with Kit Bag - Black with clear lid - 125mm (5 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-black-with-clear-lid-125mm-5-inches-opening.html)      [ RWB4110 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-black-with-clear-lid-125mm-5-inches-opening.html)

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   [ ![RWB4111](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Inspection Port with Kit Bag - White with clear lid - 125mm (5 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-white-with-clear-lid-125mm-5-inches-opening.html)

   $60.15  each    [ Nairn Inspection Port with Kit Bag - White with clear lid - 125mm (5 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-white-with-clear-lid-125mm-5-inches-opening.html)      [ RWB4111 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-white-with-clear-lid-125mm-5-inches-opening.html)

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   [ ![RWB4119](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Inspection Port with Kit Bag - White with clear lid - 150mm (6 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-white-with-clear-lid-150mm-6-inches-opening.html)

   $67.10  each    [ Nairn Inspection Port with Kit Bag - White with clear lid - 150mm (6 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-white-with-clear-lid-150mm-6-inches-opening.html)      [ RWB4119 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-white-with-clear-lid-150mm-6-inches-opening.html)

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   [ ![400355](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/400355.jpg "Nairn Marine Drain Plug and Housing – Boat Plumbing Fittings") ](https://www.rhsboating.com.au/categories/nairn-marine-drain-plug-and-housing-boat-plumbing-fittings.html)

   $9.14  each    [ Nairn Marine Drain Plug and Housing – Boat Plumbing Fittings ](https://www.rhsboating.com.au/categories/nairn-marine-drain-plug-and-housing-boat-plumbing-fittings.html)      [ 400355 ](https://www.rhsboating.com.au/categories/nairn-marine-drain-plug-and-housing-boat-plumbing-fittings.html)

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   [ ![RWB4100](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Nylon Inspection Port - All black - 100mm (4 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-black-100mm-4-inches-opening.html)

   $17.83  each    [ Nairn Nylon Inspection Port - All black - 100mm (4 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-black-100mm-4-inches-opening.html)      [ RWB4100 ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-black-100mm-4-inches-opening.html)

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   [ ![RWB4104](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Nylon Inspection Port - All black - 125mm (5 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-black-125mm-5-inches-opening.html)

   $21.37  each    [ Nairn Nylon Inspection Port - All black - 125mm (5 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-black-125mm-5-inches-opening.html)      [ RWB4104 ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-black-125mm-5-inches-opening.html)

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   [ ![RWB4112](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Nylon Inspection Port - All black - 150mm (6 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-black-150mm-6-inches-opening.html)

   $25.06  each    [ Nairn Nylon Inspection Port - All black - 150mm (6 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-black-150mm-6-inches-opening.html)      [ RWB4112 ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-black-150mm-6-inches-opening.html)

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   [ ![RWB4101](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Nylon Inspection Port - All white - 100mm (4 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-white-100mm-4-inches-opening.html)

   $17.83  each    [ Nairn Nylon Inspection Port - All white - 100mm (4 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-white-100mm-4-inches-opening.html)      [ RWB4101 ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-white-100mm-4-inches-opening.html)

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   [ ![RWB4105](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Nylon Inspection Port - All white - 125mm (5 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-white-125mm-5-inches-opening.html)

   $21.37  each    [ Nairn Nylon Inspection Port - All white - 125mm (5 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-white-125mm-5-inches-opening.html)      [ RWB4105 ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-white-125mm-5-inches-opening.html)

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   [ ![RWB4113](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Nylon Inspection Port - All white - 150mm (6 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-white-150mm-6-inches-opening.html)

   $25.06  each    [ Nairn Nylon Inspection Port - All white - 150mm (6 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-white-150mm-6-inches-opening.html)      [ RWB4113 ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-white-150mm-6-inches-opening.html)

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   [ ![RWB4102](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/RWB4102.jpg "Nairn Nylon Inspection Port - Black with clear lid - 100mm (4 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-black-with-clear-lid-100mm-4-inches-opening.html)

   $20.11  each    [ Nairn Nylon Inspection Port - Black with clear lid - 100mm (4 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-black-with-clear-lid-100mm-4-inches-opening.html)      [ RWB4102 ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-black-with-clear-lid-100mm-4-inches-opening.html)

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