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Mainsail outhaul cars — Harken CB cars for R27 and R32 track, Ronstan Series 22 and 42, and Antal outhaul sliders for 32x6 and 40x8 T-track. Click here to read more.

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Outhaul Cars: Harken CB, Ronstan Series 22 and 42, and Antal Sliders

An outhaul car rides in a track on the boom, carries the clew of the mainsail and takes the load of the outhaul line, so you can pull the foot flat in a breeze or ease it for power. The car has to match the track on your boom, and it has to carry the load your mainsail puts on it. This collection has eight cars from three makers: Harken CB (captive ball) cars for furling mains, Ronstan Series 22 and Series 42 cars, and Antal outhaul sliders in three sizes.

Outhaul Cars in This Collection
  • Harken CB outhaul cars: built for in-mast or behind-the-mast furlers on boats up to 13.5 m (45 ft), with sheave carriers that pivot side to side to follow changing lead angles. The 3076 and 3096 are listed with a 2:1 purchase, Torlon ball bearings and a deadend outhaul shackle. There are three cars: the 27 mm CB car (#1648) for 1 1/16 in R27 track, rated 1,043 kg (2,300 lb) working load; the 32 mm CB car (#3076) for 1 1/4 in R32 track, 1,361 kg (3,000 lb) and mainsails to 425 ft² (40 m²) on a monohull; and the 32 mm CB high-load car (#3096) for the same R32 track, 2,041 kg (4,500 lb) and mainsails to 550 ft² (51 m²).
  • Ronstan Series 22: the Ronstan Outhaul Car Series 22 (RC52241), listed as an outhaul car for boats to 8 m (26 ft), with alloy car bodies and grade 316 stainless fixtures.
  • Ronstan Series 42: the Ronstan Outhaul Car Series 42 (RC14241A), the larger-boat series: the listing gives Series 42 applications from mainsheet systems on boats to 24 m (78 ft) and multihull mainsheets to 19 m (62 ft), with a low-profile, anodised alloy car body and ball bearings. Ronstan gives no outhaul-specific boat size for it, so match it to your track and clew fitting. Our Series 42 outhaul car guide covers the fit.
  • Antal outhaul sliders: three sizes with a becket. The Small is 130 mm long for 32x6 T-track, the Medium is 160 mm for 40x8 T-track, and the Large is 200 mm; confirm the track section for the Large on its product page.
How to Choose an Outhaul Car
  • Match the track first: Harken lists each CB car for one track, R27 (27 mm / 1 1/16 in) or R32 (32 mm / 1 1/4 in). Antal sliders are sized to 32x6 or 40x8 T-track. A car that does not fit the track section is the wrong car, whatever its rating.
  • Then size to the mainsail: Harken rates the 3076 and 3096 by monohull mainsail area, 425 ft² (40 m²) and 550 ft² (51 m²). Ronstan lists its Series 22 outhaul car for boats to 8 m (26 ft). Read the working load on the product page before you commit.
  • Furling main or not: the Harken CB cars are made for in-mast and behind-the-mast furling mains, where the lead angle changes as the sail furls. The pivoting sheave carriers deal with that.
  • Becket and shackle: Antal sliders have a becket; the Harken 3076 and 3096 include a deadend outhaul shackle. The other listings do not state either.
Who It's For

Owners fitting or replacing the outhaul car on a cruiser with a furling or conventional mainsail, and racers rebuilding a boom. Looking for one brand? Browse the Harken outhaul cars, the Ronstan outhaul cars or the Antal outhaul cars. For the car that carries the mainsheet, see Ronstan mainsail traveler cars.

Frequently Asked Questions

What does an outhaul car do?
It slides along the boom track and holds the clew, so the outhaul line can tension the foot of the mainsail. Pull it on to flatten the sail, ease it for more power.

How do I match an outhaul car to my boom track?
Measure the track section. Harken sells its CB cars for R27 (1 1/16 in, 27 mm) and R32 (1 1/4 in, 32 mm) track; Antal sells sliders for 32x6 and 40x8 T-track. Confirm the track on the product page before you order.

Which Harken CB outhaul car do I need?
Pick the track first: the 1648 is for R27 and the 3076 and 3096 are for R32. On R32 track, the 3076 is rated to a 425 ft² (40 m²) monohull mainsail and the high-load 3096 to 550 ft² (51 m²). All three are designed for furling mains on boats to 13.5 m (45 ft).

Ronstan Series 22 or Series 42?
The Series 22 outhaul car is listed for boats to 8 m (26 ft). The Series 42 is the larger-boat series, with applications listed to 24 m (78 ft) for mainsheet systems. See the Series 42 outhaul car guide.

Does the outhaul car come with a shackle?
The Harken 3076 and 3096 include a deadend outhaul shackle. The other cars do not list one, so check the product page and plan the clew attachment separately.