OX45M3 – Optimax MK3 27 mm sprit Optimist
The MK3 sprit is an allround 27 mm sprit which is suitable for the majority of the sailors.
- Superior Lanurep spacecraft alloy
- Anodized to a dark grey color
- Grey glass fibre filled Nylon sprit ends
- 15 cm heat shrinkable sprit protection tubing,
prevents wear between mast and sprit

Related products
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OX234M3 – Optimax MK3 spar set Optimist
MK3 spar set for the Optimist. Suitable for sailors from 35 to 45 kg
Material: Superior Lanurep spacecraft alloy
Anodized: Top grade hard dark grey- MK3 mast (OX25AB3)
- MK3 40 mm boom (OX35M3
- MK3 27 mm sprit (OX45M3)
Supplied with rigging pack (OX25):
1 x Harken ball bearing hook-in block
1 x Windesign 25 mm low friction ring
1 x Windesign wind indicator PRO
1 x Deck collar with mast sleeve
1 x Nylon sprit adjuster handle
2 x Nylon top pins
1 x Dyneema primary halyard line
1 x Technora / Dyneema secondary halyard line
5 x 2.2 mm tack lines
12 x 1.2 mm double lacing lines -
OX35M3 – Optimax MK3 40 mm boom Optimist
A lightweight and flexible 40 mm racing boom which is mainly suitable for sailors below 35 kg.
- High grade alloy, dark grey anodized
- Glass fibre filled nylon in- and outboard end fittings
- Glass fibre filled nylon V-shaped outhaul cleat
- Glass fibre filled nylon lacing eyes
- Fitted with outhaul trim strip
- 3.5 mm Polyester outhaul line
- 3 mm Dyneema boom preventer line
- 3 mm Dyneema bridle with stainless steel ring
- 3 mm Dyneema primary vang line
- 5 mm Dyneema / Technora secondary vang line
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OX25AB4 – Optimax MK4 mast Optimist
The most stiff and powerfull mast, designed for experienced, heavier weight sailors. The MK4 mast for the Optimist is mainly suitable for sailors above 45 kg.
- Superior Lanurep spacecraft alloy
- High grade 45 um hard anodized surface
- Windesign wind indicator PRO
- Pennant holders
- Harken hook-in block
- 3 mm Dyneema primary halyard line with Windesign low friction ring
- Technora / Dyneema secondary halyard line
- Hard anodized aluminium Clamcleat
- Aluminium pin stop
- Sprit adjuster handle
- Low friction end stop
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OX234M4 – Optimax MK4 spar set Optimist
MK4 spar set for the Optimist. Suitable for sailors from 45 kg
Material: Superior Lanurep spacecraft alloy
Anodized: Top grade hard dark grey- MK4 mast (OX25AB4)
- MK4 45 mm boom (OX35M4)
- MK3 27 mm sprit (OX45M3)
Supplied with rigging pack (OX25):
1 x Harken ball bearing hook-in block
1 x Windesign 25 mm low friction ring
1 x Windesign wind indicator PRO
1 x Deck collar with mast sleeve
1 x Nylon sprit adjuster handle
2 x Nylon top pins
1 x Dyneema primary halyard line
1 x Technora / Dyneema secondary halyard line
5 x 2.2 mm tack lines
12 x 1.2 mm double lacing lines