Cruising
Mainsail Halyard
- Diameter
- 10 mm (3/8 in)
- Length
- 108 ft (32.9 m)
- Hardware
- Shackle
Unit price
/
Unavailable
Available to order · 5 options
BostromMasthead Sloop1974
Bostrom 37 Parts
Lines here are cut for this rig
- Rig
- Masthead Sloop
- I
- 53.02 ft
- J
- 15.09 ft
- P
- 47.24 ft
- E
- 11.48 ft
Different version? Compare 2 related rigs
| Model | I | J | P | E |
|---|---|---|---|---|
| Bostrom 37 this page | 53.02 | 15.09 | 47.24 | 11.48 |
| Bostrom 31 | 37.4 | 11.98 | 31.82 | 9.19 |
| Bostrom 31 MK II | 37.4 | 11.98 | 31.82 | 9.19 |
Feet, from MAURIPRO Sailboat Data. If your mast or boom differs from every row, send us your measurements before ordering.
Line type
Grade
Halyards 12
-
$214.00 USD
List Price: $288.40 USD -
Performance Cruise
Mainsail Halyard
- Diameter
- 10 mm (3/8 in)
- Length
- 108 ft (32.9 m)
- Hardware
- Shackle
$560.00 USDList Price: $755.37 USDUnit price /UnavailableAvailable to order · 4 options
-
Club Racing
Mainsail Halyard
- Diameter
- 10 mm (3/8 in)
- Length
- 108 ft (32.9 m)
- Hardware
- Shackle
$623.00 USDList Price: $839.52 USDUnit price /UnavailableAvailable to order · 14 options
-
Grand Prix Racing
Mainsail Halyard
- Diameter
- 10 mm (3/8 in)
- Length
- 108 ft (32.9 m)
- Hardware
- Shackle
$780.00 USDList Price: $1,051.27 USDUnit price /UnavailableAvailable to order · 10 options
-
Cruising
Genoa Halyard
- Diameter
- 12 mm (1/2 in)
- Length
- 114 ft (34.7 m)
- Hardware
- Shackle
$449.00 USDList Price: $605.28 USDUnit price /UnavailableAvailable to order · 5 options
-
Performance Cruise
Genoa Halyard
- Diameter
- 10 mm (3/8 in)
- Length
- 114 ft (34.7 m)
- Hardware
- Shackle
$427.00 USDList Price: $576.07 USDUnit price /UnavailableAvailable to order · 4 options
-
Club Racing
Genoa Halyard
- Diameter
- 10 mm (3/8 in)
- Length
- 114 ft (34.7 m)
- Hardware
- Shackle
$759.00 USDList Price: $1,022.36 USDUnit price /UnavailableAvailable to order · 14 options
-
Grand Prix Racing
Genoa Halyard
- Diameter
- 10 mm (3/8 in)
- Length
- 114 ft (34.7 m)
- Hardware
- Shackle
$924.00 USDList Price: $1,245.67 USDUnit price /UnavailableAvailable to order · 10 options
-
Cruising
Spinnaker Halyard
- Diameter
- 10 mm (3/8 in)
- Length
- 123 ft (37.5 m)
- Hardware
- Shackle
$310.00 USDList Price: $418.68 USDUnit price /UnavailableAvailable to order · 5 options
-
Performance Cruise
Spinnaker Halyard
- Diameter
- 10 mm (3/8 in)
- Length
- 123 ft (37.5 m)
- Hardware
- Shackle
$449.00 USDList Price: $605.36 USDUnit price /UnavailableAvailable to order · 4 options
-
Club Racing
Spinnaker Halyard
- Diameter
- 10 mm (3/8 in)
- Length
- 123 ft (37.5 m)
- Hardware
- Shackle
$788.00 USDList Price: $1,061.50 USDUnit price /UnavailableAvailable to order · 14 options
-
Grand Prix Racing
Spinnaker Halyard
- Diameter
- 10 mm (3/8 in)
- Length
- 123 ft (37.5 m)
- Hardware
- Shackle
$966.00 USDList Price: $1,302.12 USDUnit price /UnavailableAvailable to order · 10 options
- View moreAll Bostrom 37 halyards & sheets
Made up to the lengths computed from the Bostrom 37's rig dimensions above. Colour and taper are chosen when you add to cart.
Sheets & guys 12
-
Cruising
Genoa Sheet
- Diameter
- 12 mm (1/2 in)
- Length
- 55 ft (16.8 m)
- Hardware
- None listed
$106.00 USDList Price: $143.88 USDUnit price /UnavailableAvailable to order · 5 options
-
Performance Cruise
Genoa Sheet
- Diameter
- 12 mm (1/2 in)
- Length
- 55 ft (16.8 m)
- Hardware
- Soft shackle
$242.00 USDList Price: $341.47 USDUnit price /UnavailableAvailable to order · 4 options
-
Club Racing
Genoa Sheet
- Diameter
- 12 mm (1/2 in)
- Length
- 55 ft (16.8 m)
- Hardware
- Soft shackle
$258.00 USDList Price: $363.55 USDUnit price /UnavailableAvailable to order · 14 options
-
Grand Prix Racing
Genoa Sheet
- Diameter
- 10 mm (3/8 in)
- Length
- 55 ft (16.8 m)
- Hardware
- Soft shackle
$288.00 USDList Price: $395.15 USDUnit price /UnavailableAvailable to order · 8 options
-
Performance Cruise
Spinnaker Sheet
- Diameter
- 10 mm (3/8 in)
- Length
- 73 ft (22.3 m)
- Hardware
- Shackle
$332.00 USDList Price: $447.98 USDUnit price /UnavailableAvailable to order · 4 options
-
Club Racing
Spinnaker Sheet
- Diameter
- 10 mm (3/8 in)
- Length
- 73 ft (22.3 m)
- Hardware
- Shackle
$654.00 USDList Price: $881.87 USDUnit price /UnavailableAvailable to order · 14 options
-
Grand Prix Racing
Spinnaker Sheet
- Diameter
- 10 mm (3/8 in)
- Length
- 73 ft (22.3 m)
- Hardware
- Shackle
$761.00 USDList Price: $1,026.25 USDUnit price /UnavailableAvailable to order · 8 options
-
Club Racing
Spinnaker Guy
- Diameter
- 10 mm (3/8 in)
- Length
- 55 ft (16.8 m)
- Hardware
- Shackle
$639.00 USDList Price: $861.82 USDUnit price /UnavailableAvailable to order · 14 options
-
Grand Prix Racing
Spinnaker Guy
- Diameter
- 10 mm (3/8 in)
- Length
- 55 ft (16.8 m)
- Hardware
- Shackle
$721.00 USDList Price: $971.55 USDUnit price /UnavailableAvailable to order · 8 options
-
Club Racing
Asymmetrical Spinnaker Sheet
- Diameter
- 10 mm (3/8 in)
- Length
- 73 ft (22.3 m)
- Hardware
- None listed
$258.00 USDList Price: $348.83 USDUnit price /UnavailableAvailable to order · 14 options
-
Grand Prix Racing
Asymmetrical Spinnaker Sheet
- Diameter
- 10 mm (3/8 in)
- Length
- 73 ft (22.3 m)
- Hardware
- None listed
$366.00 USDList Price: $493.22 USDUnit price /UnavailableAvailable to order · 8 options
-
Performance Cruise
Gennaker Sheet
- Diameter
- 10 mm (3/8 in)
- Length
- 73 ft (22.3 m)
- Hardware
- Shackle
$600.00 USDList Price: $808.31 USDUnit price /UnavailableAvailable to order · 4 options
- View moreAll Bostrom 37 halyards & sheets
Made up to the lengths computed from the Bostrom 37's rig dimensions above. Colour and taper are chosen when you add to cart.
Compare grades
| Grade | Rope, as described on each product | Colours | Tapered option | From | Filter |
|---|---|---|---|---|---|
| Cruising4 lines | Cruiser XTS Polyester Double Braid | Up to 5 | No | $106.00 | |
| Performance Cruise6 lines | DX Performance SK38 with polyester cover | Up to 4 | No | $242.00 | |
| Club Racing7 lines | S Cup (Stirotec with polyester cover) | Up to 7 | Yes | $258.00 | |
| Grand Prix Racing7 lines | DX Cup Dyneema SK78 core with polyester coverTN Racing - Stirotex core / Technora Polyester cover | Up to 5 | Yes | $288.00 |
Rope names are quoted from each product's own description; prices are the lowest option for the Bostrom 37. Not sure which grade suits your sailing? Ask us.
Winches 2
-
Harken
Harken Self Tailing Winch Radial Size 60
Aluminum Black / Two Speed
Sized for this boat · Primary winches (genoa/jib sheets)
$4,563.95 USDList Price: $5,369.00 USDUnit price /UnavailableAvailable to order
-
Harken
Harken Self Tailing Winch Radial Size 40
Aluminum Black / Two Speed
Sized for this boat · Halyard winch
$1,175.95 USDList Price: $1,679.00 USDUnit price /UnavailableAvailable to order
- View moreAll winches
Spinnaker poles 1
-
Forespar
Forespar Offshore Spinnaker Pole 3 1/2 in. Dia., 16 ft. max. length (for Boats 35-40 ft.)
UTS/UTR Ends
Sized for this boat · Spinnaker pole
$1,979.16 USDList Price: $2,473.95 USDUnit price /UnavailableAvailable to order
- View moreAll spinnaker & whisker poles
Blocks 4
-
Harken Block
Classic Midrange Standard 76mm Single
Fiddle
Sized for this boat · Mainsheet block A (4:1 fiddle)
$208.95 USDUnit price /UnavailableAvailable to order
-
Harken Block
Classic Midrange HexaRatchet 76mm Single
Fiddle - 280 Cam-Matic / Becket
Sized for this boat · Mainsheet block B (4:1 fiddle)
$518.95 USDList Price: $589.05 USDUnit price /UnavailableAvailable to order
-
Harken Block
Wire High Strength 51mm
Wire
Sized for this boat · Boom vang cascade block (8:1)
$119.95 USDUnit price /UnavailableAvailable to order
-
Harken Block
Classic Midrange Standard 76mm Single
Fiddle - 280 Cam-Matic / Becket
Sized for this boat · Boom vang fiddle block with cam (8:1 cascade)
$423.95 USDList Price: $481.35 USDUnit price /UnavailableAvailable to order
- View moreAll blocks
Traveler & genoa cars 4
-
Harken
Harken Traveler Car 1 1/4 in (32.0 mm)
Stand-Up Toggle - Purchase: 4:1
Sized for this boat · Traveler car (Standard 4:1)
$494.95 USDList Price: $561.95 USDUnit price /UnavailableAvailable to order
-
Harken
Harken ESP End Controls
For Travelers: 6 1/4 in (32.0 mm) - Double Sheave and Cam Cleat (Pair)
Sized for this boat · Traveler end controls
$571.95 USDList Price: $649.85 USDUnit price /UnavailableAvailable to order
-
Harken Genoa Car
Slider Pinstop
For Tracks: 1 1/4 in (32.0 mm)
Sized for this boat · Genoa lead car (pinstop slider)
$1,212.95 USDList Price: $1,378.50 USDUnit price /UnavailableAvailable to order
-
Harken Block
Cruising ESP Aluminum 100mm Single
Footblock
Sized for this boat · Genoa sheet footblock
$230.00 USDList Price: $319.75 USDUnit price /UnavailableAvailable to order
- View moreAll travelers, tracks & genoa cars
Tracks are sold by length and are not included. Ask us for the track to suit your boat.
Mainsail covers 2
-
MAURIPRO
MAURIPRO Canvas Shop Mainsail Cover
High Neck for booms up to 11.5 ft (3.5 m)
$426.00 USDList Price: $558.63 USDUnit price /UnavailableAvailable to order · 10 options
-
MAURIPRO
MAURIPRO Canvas Shop Mainsail Cover
MZ for booms up to 11.5 ft (3.5 m)
$518.00 USDList Price: $678.48 USDUnit price /UnavailableAvailable to order · 10 options
- View moreAll Bostrom 37 mainsail covers
No Bostrom 37 part matches this search and these filters.
Parts marked "Sized for this boat" are chosen from the manufacturers' sizing guides (Harken, Forespar, Schaefer) using this boat's published dimensions. Check your boat's equipment before ordering.
Specifications
| Builder | Bostrom |
|---|---|
| Designer | Bruno Boström |
| Years built | 1974 |
| Number built | 300 |
| Rig | Masthead Sloop |
| Hull | Fin with rudder on skeg |
| Construction | FG |
| Length overall | 36.3 ft 11.1 m |
| Waterline length | 30 ft 9.2 m |
| Beam | 12.8 ft 3.9 m |
| Displacement | 17,637 lb 8,000 kg |
| Ballast | 7,716 lb 3,500 kg |
| I · foretriangle height | 53.02 ft 16.16 m |
| J · foretriangle base | 15.09 ft 4.6 m |
| P · mainsail luff | 47.24 ft 14.4 m |
| E · mainsail foot | 11.48 ft 3.5 m |
| Forestay length | 15.1 ft 4.6 m |
| 100% jib area | 400 sq ft 37.2 m² |
| Mainsail area | 292.9 sq ft 27.2 m² |
| Jib + mainsail area | 692.9 sq ft 64.4 m² |
| Cruising spinnaker area | 680.1 sq ft 63.3 m² |
Source: MAURIPRO Sailboat Data, updated 2026-07-01. Always confirm against your own boat.
More for the Bostrom 37
- Bostrom 37 sailboat data
- All halyards & sheets for the Bostrom 37
- All Bostrom boats
- Standing rigging, quoted to your rig
- All boats A–Z
- Ask us what fits your Bostrom 37
Other Bostrom models
Questions
What Bostrom 37 parts does MAURIPRO carry?
The Bostrom 37 page lists halyards and sheets made up to this boat's rig lengths, mainsail covers, sails, winches, blocks, travelers, genoa cars, boom vangs and spinnaker poles sized with manufacturer guides where the boat size allows. Prices and availability shown are live from our catalogue.
How do I know a part fits my Bostrom 37?
Halyards and sheets are made up to lengths computed from the Bostrom 37's published rig dimensions (I, J, P, E). Other parts are matched with manufacturer sizing guides and are labelled as sized for this boat. Fit can still depend on your boat's year, builder and rig, so check the product details or ask our technical team before you order.
Where can I find the Bostrom 37 rig dimensions?
Our Bostrom 37 Sailboat Data page lists the rig dimensions (I, J, P, E) and other published data we hold for this boat. Figures come from a sailboat database and may differ from your boat as built.