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One Design · Keelboat

RS21 parts, rigging and specifications

The RS21 is a keelboat one-design class designed by Richards / Whitehouse / RS Sailing (2018). MAURIPRO lists 74 parts for the RS21 below, grouped by system, with live prices and stock.

  • Keelboat
  • 74 parts
  • 12 published figures

Your RS21 at MAURIPRO

What you can do on this page.

01Shop parts by system74 parts for the RS21, matched by part number and grouped by system.Shop all parts →
02Check the specifications12 published figures, each with its source.See specifications →
03Tuning guides2 published guides for this class.See the list →
04Get expert helpNot sure a part fits your RS21? Send us your sail number and year.Contact us →

Shop RS21 by system

RS21 parts

Prices and stock are live from our catalogue.

Rope sold by the foot is added at the cut length shown on the card.

RS21 specifications

SpecificationPublished figureSource
Beam2.20m (7'3")RS Sailing - RS21 product page ('RS21 One Design - Keelboat racing the RS way')
DraftDraught1.38m (4'6")RS Sailing - RS21 product page ('RS21 One Design - Keelboat racing the RS way')
Displacement650kg (1433lbs)RS Sailing - RS21 product page ('RS21 One Design - Keelboat racing the RS way'); matches Wikipedia, Wikipedia - RS21
Mainsail areaMainsail – Club and Mainsail – Race16.2m² (175ft²)RS Sailing - RS21 product page ('RS21 One Design - Keelboat racing the RS way')
Jib areaJib – Club and Jib – Race8.4m² (90.4ft²)RS Sailing - RS21 product page ('RS21 One Design - Keelboat racing the RS way')
Spinnaker / gennaker areaGennaker – Race40m² (430.5ft²)RS Sailing - RS21 product page ('RS21 One Design - Keelboat racing the RS way')
CrewRule C.3.1The crew shall consist of 3 or more persons.International RS21 Class Association - RS21 Class Rules, effective date 2023-June-22, status Approved (v.2)
DesignerRichards / Whitehouse / RS SailingRS Sailing - RS21 product page ('RS21 One Design - Keelboat racing the RS way')
DesignerRichards, Whitehouse and RS SailingInternational RS21 Class Association - RS21 Class Rules, effective date 2023-June-22, status Approved (v.2)
BuilderRS SailingRS Sailing - RS21 product page ('RS21 One Design - Keelboat racing the RS way')
First built / designedDesigned in 20182018International RS21 Class Association - RS21 Class Rules, effective date 2023-June-22, status Approved (v.2)
RigSail sets listed by builderClub / RaceRS Sailing - RS21 product page ('RS21 One Design - Keelboat racing the RS way')

Figures are shown as each source publishes them, with the other unit converted. Class rules set the measurements that count for racing.

RS21 tuning guides

  • RS Sailing / West Coast Sailing: RS21 Tuning Guide (created by Jake Sorosky, West Coast Sailing)Version 2019 · 2 pages
  • RS Sailing (rigging manual): RS21 Rigging Manual V16 – 4.8 Rough Rig SettingVersion V16 · 95 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.

RS21 class rules and references

  • Class rules: Class Rules 2023 June 22 v.2 (from filename, linked on class site)
  • Class association: rs21sailing.org
  • Builder: rssailing.com

References checked 2026-11-04.

RS21 buying questions

What RS21 parts does MAURIPRO carry?

74 products are listed for the RS21 on this page: halyards, sheets & control lines (22); blocks & sheaves (7); cleats, clutches & fairleads (2); travelers, tracks & cars (1); spars, poles & rig fittings (8); foils, rudders & tillers (2); and more. Prices and availability shown are live from our catalogue.

How do I know a part fits my RS21?

Each part here is linked to the RS21 because its exact manufacturer part number appears on the RS21 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 RS21?

Sailmakers have published tuning guides for this class, including RS Sailing / West Coast Sailing (RS21 Tuning Guide (created by Jake Sorosky, West Coast Sailing), 29 April 2019); RS Sailing (rigging manual) (RS21 Rigging Manual V16 – 4.8 Rough Rig Setting, Rigging Manual V16). These guides belong to their publishers; MAURIPRO does not host or reproduce them, so please get them from the sailmaker or your class association.

Which rules govern the RS21?

The class is governed by its class rules (Class Rules 2023 June 22 v.2 (from filename, linked on class site)). Check the current edition with the class association before buying parts for racing.

Not sure which part fits your RS21?Send us your sail number, year and builder and our team will check it.
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