Maas Double and Single

NOTE: The Maas Double and Flat-Water Single are not currently a part of our rental fleet, but we do sell these shells and have privately-owned examples in our boathouse.

The Maas Double

Maas Double
Maas Double on the Bay

OWRC members have been rowing the Maas Double in San Francisco Bay since it was introduced, in the annual Open Ocean Regatta, and in other open water competitions. That it can handle rough conditions is clear, this boat has powered through the roughest waters we row. In many competitionsĀ  all doubles participating are Maas Doubles, the shell is that dominant in this category.

Perhaps the most important thing about this boat is that it is clearly a Maas shell, in looks, construction and performance.

Here’s how Maas describes it:

The Maas Double is designed as an open water racing shell as well as a club race/trainer for intermediate to advanced rowers. In its first year of being raced, this boat captured four course records — 3 in open water, 1 in flat water.

Maas DoubleDespite the narrow (14.75″) waterline beam excellent stability is achieved through a slightly flattened hull section shape and a low center of gravity. Rough water stability and dryness are enhanced by the flared hull form above the waterline. As on all our shells the externally bonded hull to deck lip reduces spray and adds stiffness. Other open water features include minimum volume cockpits, optional self bailers and carbon fiber splash guard.

Construction is of carbon fiber for stiffness. . Exterior finish is 4-6 mil gelcoat.

Flat water speed trials against top level flat water doubles have shown no appreciable speed difference. We believe this boat is far and away the fastest open water double available. If you want to win a race or set a new course record, this will be the boat to row. In flat water races when conditions are less than ideal, this shell would be a formidable contender.


  • Length: 31′. Beam at waterline: 14.75″. Beam max: 22.5″
  • Weight: 65 lbs
  • Maximum combined rower weight: 480 lbs
  • Rigger: Wing style. Welded 6061 T6 aluminum tube construction. Adjustable for height, spread and work through the pin. Elegant, light and rigid
  • Skeg: Large anodized aluminum
  • Maas Double
    Maas Double Handling rough water

    Self bailer: Optional, very useful for choppy conditions — a must for open water racing – suction type, 4oz

  • Seat: Foam core fiberglass — this design is the best we’ve found for long distance rowing
  • Foot Stretchers: Carbon fiber/fiberglass, cored construction, neoprene and Velcro straps — easily adjustable over a 7.5″ range — adjustable heel cup height
  • Oarlocks: Adjustable for height, pitch and spread (155-165cm)
  • Inspection port: 4″ diameter — comes with an integral nylon bag for wallet, keys, etc
  • Positive Flotation: 6 air bags.


Maas Flat-water Single

Maas SingleThe Maas Single combines the many fine features of all the Maas shells with added length and extra-light weight to create a great flat-water racer. The boat resembles the Flyweight, with several feet of extra length for speed, and it features the durable construction and easy set-up and care that is a hallmark of Maas.

Designed primarily as a club racer the Maas Single Scull is exceptionally stable, stiff and durable at a weight close to shells costing thousands of dollars more (35 lbs., 33.5 lbs. with performance package).

Carbon fiber/S glass composite construction with a Nomex honeycomb/carbon fiber I-beam creates a very tough and rigid boat that is easily repaired if damaged.

The aluminum wing rigger allows for a lowering of the sculler’s center of gravity, greatly enhancing stability without the lackluster performance normally associated with stable boats. This ease of set up translates to greater speed when the rower cannot consistently apply full power in choppy water or when there is less than perfect sculler balance.

Highly adjustable rigging and our unique flared hull design allow the Single Scull to fit a wide range of people (see design and constructions section of this website). Scullers ranging in weight from 130 lbs. to 220 lbs. successfully race this boat.

It’s light. It’s easy to set up. It’s fast, stiff and durable. A carbon fiber club single at an affordable price.

  • Length: 27′ 1″, Beam at washbox: 16.5″, Beam at waterline: 12″
  • Weight fully rigged: 35 lbs
  • Maximum rower weight: 225 lbs
  • Seat tracks: Adjustable fore and aft
  • Rigger: Wing style. Welded 6061 T6 aluminum tube construction
  • Adjustable for height and work through the pin. Elegant, light and rigid
  • Oarlocks: Adjustable for height, pitch and spread (155-165cm)
  • Calf Guard: A protective piece installed across the track ends, designed to protect the rower from “boat bite”
  • Foot Stretchers: Carbon fiber/fiberglass, cored construction, neoprene and Velcro foot straps — easily adjustable over a 7.5″ range — adjustable heel cup height
  • Skeg: Anodized aluminum
  • Splash guard: Virtually unbreakable polycarbonate
  • Seat: Cored fiberglass composite. Comfortable, smooth and light
  • Inspection port: 4″ diameter. Provides access for seat track adjustment
  • Hull and deck construction: Syntactic cored carbon fiber and S glass, carbon fiber/Nomex honeycomb I-beam, vinyl ester resin, 4-6 mil gel coat finish. Color: white, choice of red, black, or blue hull pin stripe.