One Design · Keelboat
Cape 31 parts, rigging and specifications
The Cape 31 is a keelboat one-design class designed by Mark Mills (2017), with a published length overall of 31 ft 4 in (9.55 m). MAURIPRO lists 91 parts for the Cape 31 below, grouped by system, with live prices and stock.
- Keelboat
- 91 parts
- 10 published figures
Your Cape 31 at MAURIPRO
What you can do on this page.
Shop Cape 31 by system
Cape 31 parts
Prices and stock are live from our catalogue.
Bobstay (UHMWPE, min 8 mm) · 8 mm · 9.8 ft cut length
Premium Ropes - DX Core 78 - 8 mm (5/16 in) Dyneema SK78 Single Braid
Cam-Matic with fast-release fairlead (jib leads)
Genoa sheet footblock · Harken genoa lead car, midrange 29-34 ft (31 ft)
Sized with: Harken genoa lead car selection guide
Harken Block - 57mm Aluminum ESP Footblock
Mid-range jib fairlead 12 mm (AL-3826)
Harken Jib Lead - Grand Prix Midrange - Aluminum - Inside Dia: 1/2 in (12 mm)
Headsail foil - Harken Carbo Race foil Unit 0, 12.0 m
Harken Headsail Foil - Carbo Racing Foil Set - Unit 0 - Extrusion Length: 39.4 ft (12.0 m)
Lifejacket, gas inflatable ISO 12402-3 (150 N), crotch/thigh straps, one per crew
LALIZAS Inflatable PFDs - Sigma 170N ISO w/ D-Ring & Crotch Strap (Adult) - Black - Automatic
Cunningham primary · 3 mm · 6.6 ft cut length · max 8:1 (F.6.3(a)(xi)) purchase
Premium Ropes - DX Core 99 - 3 mm (1/8 in) Dyneema SK99 Single Braid
Cam-Matic 150 with fast-release fairlead (mainsheet fine)
Harken Cam Cleat - Cam-Matic 150 w/ Fast Release Fairlead 494 - Line: 1/8 to 1/2 in (3 to 12 mm)
Genoa lead car (pinstop slider) · Harken genoa lead car, midrange 29-34 ft (31 ft)
Sized with: Harken genoa lead car selection guide
Harken Genoa Car - ESP Slider Pinstop - For Tracks: 1 1/16 in (27.0 mm)
Folding padeye low load (spinnaker sheeting anchor points)
Harken Padeye - Stainless Steel Folding - Low Load - Size: 19/32 in (14.9 mm)
Tiller extension Spinlock EA/1600S (950-1600 mm)
Heaving line 6 mm, 15-25 m (throwing sock)
LALIZAS Rescue Lines - LifeLink ISAF Throwing Line - Yellow 75.0 ft (22.8 m)
Cunningham dogbone line · 3 mm · 4.9 ft cut length
Premium Ropes - DX Core 99 - 3 mm (1/8 in) Dyneema SK99 Single Braid
Swivel base cam cleat (vang)
Traveller track 27 mm low-beam pinstop 1.5 m
Harken Track 27.0 mm Low-Beam Pinstop - Aluminum - Length: 4.9 ft (1.5 m)
Soft attachment loop 5 mm x 8 in (spinnaker blocks)
Harken Soft Attchment Loop - Dia: 3/16 in (5.0 mm) - Length: 8.0 in (203.0 mm)
Retro-reflective tape (lifebuoy, lifejackets)
Lalizas Retrorefl.Tape Oralite ,Solas & Uscg 131Ft (40M) Roll
Soft shackles 3 mm · 3 mm · 0.7 ft cut length
Premium Ropes - DX Core 99 - 3 mm (1/8 in) Dyneema SK99 Single Braid
Carbo 29 mm stand-up fixed block (mainsheet fine)
Harken Block - Carbo 29mm Single - Stand-Up - Fixed Head
Ball-bearing swivel mainsheet cam base
Harken Swivel Cam Cleat - Base (Standard) w/ Cam-Matic 150 - Line: 1/8 to 1/2 in (3 to 12 mm)
Traveller car 27 mm high-load loop car
Harken Traveler Car 1 1/16 in (27.0 mm) - High-Load - Loop Car
Lifebuoy with self-igniting light, whistle and drogue
Lalizas Set Horseshoe Lifebuoy 'Quick Rd' Orange, Lifeb. Light 71325, 98Ft (30M) Rope, Case Gray
Jib halyard 2:1 soft shackle · 4 mm · 0.7 ft cut length
Premium Ropes - DX Core 99 - 4 mm (5/32 in) Dyneema SK99 Single Braid
Rope clutch XTS0610/C single, ceramic jaws
Spinlock Rope Clutch - Single XTS w/ Ceramic Cam - Line Size: 1/4 to 3/8 in (6 to 10 mm)
Lifebuoy with self-igniting light, whistle and drogue (alternative)
LALIZAS Signals Nautical Whistle w/Lanyard USCG/SOLAS - Orange
Barberhauler secondary · 4 mm · 6.6 ft cut length
Premium Ropes - DX Core 99 - 4 mm (5/32 in) Dyneema SK99 Single Braid
Series 25 T-track car / end control (composite slide, pin, plunger stop)
Ronstan T-Track End Control - Series 25 - Composite Slide, Pin and Plunger Stop
Winch handles, 10 in locking (alternative)
Lewmar Winch Handle - 10 in. / Aluminum / Single Hand Grip / Locking
Anchor + chain, combined >= 8 kg (excluding rope) (alternative)
Lewmar Claw Anchor (Galvanised) - 16.5 lb (7.5 kg)
Vang 1st fall · 4 mm · 9.8 ft cut length · max 16:1 (F.6.3(a)(vii)) purchase
Premium Ropes - DX Core 99 - 4 mm (5/32 in) Dyneema SK99 Single Braid
Vang 2nd fall · 4 mm · 9.8 ft cut length
Premium Ropes - DX Core 99 - 4 mm (5/32 in) Dyneema SK99 Single Braid
Carbo 40 mm fiddle block with cam (jib halyard)
Harken Block - Carbo 40mm Single - Fiddle - 471 Carbo-Cam / Becket
Soft shackles 4 mm · 4 mm · 0.7 ft cut length
Premium Ropes - DX Core 99 - 4 mm (5/32 in) Dyneema SK99 Single Braid
Spinnaker sheet strop · 5 mm · 3.3 ft cut length
Premium Ropes - DX Core 99 - 5 mm (3/16 in) Dyneema SK99 Single Braid
Barberhauler primary · 5 mm · 13.1 ft cut length · headsail lead max 8:1 (F.6.3(a)(ix)) purchase
Premium Ropes - DX Core 99 - 5 mm (3/16 in) Dyneema SK99 Single Braid
Cunningham soft shackle · 5 mm · 4.9 ft cut length
Premium Ropes - DX Core 99 - 5 mm (3/16 in) Dyneema SK99 Single Braid
Aft lifelines / rear gate (top + bottom) · 5 mm · 11.5 ft cut length
Premium Ropes - DX Core 99 - 5 mm (3/16 in) Dyneema SK99 Single Braid
Boom vang fiddle block (4:1) · Harken boom vang, midrange 29-34 ft (31 ft)
Sized with: Harken boom vang selection guide
Harken Block - Carbo 57mm Single - Fiddle
Lifejacket, gas inflatable ISO 12402-3 (150 N), crotch/thigh straps, one per crew (alternative)
Spinlock Inflatable PFDs - Deckvest LITE 150N ISO - Bleach White
Mainsheet fine tune · 6 mm · 27.9 ft cut length · max 16:1 (F.6.3(a)(v)); builder group 'Fine- 4:1' purchase
Premium Ropes - DX Cup - 6 mm (1/4 in) Dyneema SK78 core / Polyester cover
Boom vang fiddle block with cam (4:1) · Harken boom vang, midrange 29-34 ft (31 ft)
Sized with: Harken boom vang selection guide
Harken Block - Carbo 57mm Single - Fiddle - 150 Cam-Matic / Becket
Traveller control line · 6 mm · 42.7 ft cut length · max 4:1 (F.6.3(a)(vi)); builder group 'Main Traveler- 5:1' purchase
Premium Ropes - DX Cup - 6 mm (1/4 in) Dyneema SK78 core / Polyester cover
Handheld VHF, watertight (alternative)
Standard Horizon HX380 Handheld VHF Radio (5W, Submersible IPX-7)
Barberhauler control · 6 mm · 23 ft cut length
Premium Ropes - DX Cup - 6 mm (1/4 in) Dyneema SK78 core / Polyester cover
Carbo Ratchamatic 75 mm block (mainsheet)
Harken Block - Carbo Ratchamatic 75mm Single - Swivel / Standard Grip (Black)
Vang control line · 6 mm · 32.8 ft cut length
Premium Ropes - DX Cup - 6 mm (1/4 in) Dyneema SK78 core / Polyester cover
Cunningham control line · 6 mm · 13.1 ft cut length
Premium Ropes - DX Cup - 6 mm (1/4 in) Dyneema SK78 core / Polyester cover
Main halyard · 8 mm · 137.8 ft cut length · max 2:1 (F.6.3(a)(i)) purchase
Premium Ropes - DX Cup - 8 mm (5/16 in) Dyneema SK78 core / Polyester cover
Jib halyard · 8 mm · 141.1 ft cut length · 2:1 + fine-tune max 8:1 (F.6.3(a)(ii), AP1) purchase
Premium Ropes - DX Cup - 8 mm (5/16 in) Dyneema SK78 core / Polyester cover
Spinnaker halyard · 8 mm · 118.1 ft cut length
Premium Ropes - DX Cup - 8 mm (5/16 in) Dyneema SK78 core / Polyester cover
Spinnaker tack line · 8 mm · 59.1 ft cut length
Premium Ropes - DX Cup - 8 mm (5/16 in) Dyneema SK78 core / Polyester cover
Mainsheet (coarse) · 8 mm · 88.6 ft cut length · max 4:1 coarse (F.6.3(a)(iv)); builder group label 'Course- 6:1' purchase
Premium Ropes - DX Cup - 8 mm (5/16 in) Dyneema SK78 core / Polyester cover
Jib sheets · 8 mm · 24.6 ft cut length · 1:1 or 2:1 (F.6.3(a)(viii)) purchase
Premium Ropes - DX Cup - 8 mm (5/16 in) Dyneema SK78 core / Polyester cover
Traveller end controls 27 mm (single sheave / dead end pair)
Harken ESP End Controls - For Travelers: 1 1/16 in (27.0 mm) - Single Sheave and Dead End (Pair)
Parts marked "Sized for this boat" are chosen from the manufacturer sizing guides published on our Selection Guides pages (Harken winch chart, Forespar pole guide, Harken mainsheet guide, Schaefer hardware chart) using the published dimensions of the Cape 31. They are not specified by the class rules; check your class rules for limits before racing.
Rope sold by the foot is added at the cut length shown on the card.
Cape 31 specifications
| Specification | Published figure | Source |
|---|---|---|
| Length overall (LOA) | 9.55m (31 ft 4 in) | International Cape 31 Class Association - The Boat page (class website, (c) 2026); matches Wikipedia, Wikipedia - Cape 31 |
| Waterline length (LWL) | 8.75m (28 ft 8 in) | International Cape 31 Class Association - The Boat page (class website, (c) 2026); matches Wikipedia |
| Beam | 3.05m (10 ft) | International Cape 31 Class Association - The Boat page (class website, (c) 2026); matches Wikipedia, Wikipedia - Cape 31 |
| Draft | 2.45m (8 ft) | International Cape 31 Class Association - The Boat page (class website, (c) 2026); matches Wikipedia, Wikipedia - Cape 31 |
| DisplacementListed as displacement/weight | 1800kg (3,970 lb) | International Cape 31 Class Association - The Boat page (class website, (c) 2026) |
| Crew | 7 or 8 up | International Cape 31 Class Association - The Boat page (class website, (c) 2026) |
| Designer | Mark Mills | International Cape 31 Class Association - The Boat page (class website, (c) 2026) |
| BuilderLicensed boat builder | Cape Performance Sailing | International Cape 31 Class Association - The Boat page (class website, (c) 2026) |
| First built / designed | 2017 | Wikipedia - Cape 31; matches Wikipedia |
| RigSail wardrobe as listed | Squaretop Mainsail, J1 & J2 Jibs, Heavy Weather Jib, A1.5, A2, A4 Gennakers | International Cape 31 Class Association - The Boat page (class website, (c) 2026) |
Figures are shown as each source publishes them, with the other unit converted. Class rules set the measurements that count for racing.
Cape 31 tuning guides
- North Sails: Cape 31 Tuning GuideVersion 2023 · 7 pages
Tuning guides belong to the sailmakers that publish them. MAURIPRO does not host or reproduce them; ask the sailmaker or your class association for a copy.
Cape 31 class rules and references
- Class rules: published by the class association
- Class association: cape31class.com
- Builder: capeperformancesailing.com
References checked 2026-11-04.
Cape 31 buying questions
What Cape 31 parts does MAURIPRO carry?
91 products are listed for the Cape 31 on this page: halyards, sheets & control lines (24); blocks & sheaves (25); cleats, clutches & fairleads (5); travelers, tracks & cars (6); deck hardware (3); winches & handles (6); and more. Prices and availability shown are live from our catalogue.
How do I know a part fits my Cape 31?
Each part here is linked to the Cape 31 because its exact manufacturer part number appears on the Cape 31 parts lists we reviewed. Fit can still depend on your boat's year, builder and rig, so check the product details and your class rules, or ask our technical team before you order.
Are there tuning guides for the Cape 31?
Sailmakers have published tuning guides for this class, including North Sails (Cape 31 Tuning Guide, December 2023). These guides belong to their publishers; MAURIPRO does not host or reproduce them, so please get them from the sailmaker or your class association.
Everything in this collection
All products currently in this MAURIPRO collection, with filters.
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Harken Jib Lead - Grand Prix Midrange - Aluminum - Inside Dia: 1/2 in (12 mm)
HAR3280
$50.95 USDUnit price /Unavailable -
Harken Block - Black Magic 57mm Single - Loop
HAR3214
$269.95 USDList Price: $307.10 USDUnit price /Unavailable -
Harken Soft Attchment Loop - Dia: 3/16 in (5.0 mm) - Length: 8.0 in (203.0 mm)
HAR3202
$103.95 USDUnit price /Unavailable -
Harken Padeye - Stainless Steel Folding - Low Load - Size: 19/32 in (14.9 mm)
HAR3206
$42.95 USDUnit price /Unavailable -
Harken Block - Carbo Ratchamatic 75mm Single - Swivel / Standard Grip (Black)
HAR2680
$175.95 USDUnit price /Unavailable -
Harken Block - Carbo 40mm Single - Fiddle - 471 Carbo-Cam / Becket
HAR2658
$149.95 USDUnit price /Unavailable -
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HAR240
$105.95 USDUnit price /Unavailable -
Harken Block - Carbo 40mm Single - Pivoting / 150 Cam-Matic
HAR2156
$92.95 USDUnit price /Unavailable -
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