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Spark III C50 RDM 400 With Mastbag
The Spark III C50 mast is an excellent choice for general freeride blasting and progression.
Loftsails utilizes high-quality pre-preg construction methods in production, making Spark III much more than just an entry-level mast. With its superior reaction and performance, it can rival many higher carbon-content mast models.
The solid construction of the Spark III mast provides peace of mind and ensures durability for long-lasting use.
Spark III C50 RDM 400 With Mastbag
What are the key differences between RDM and SDM compatibility in Loftsails, especially for cambered sails?
01 RDM masts
These have a smaller diameter with thicker walls, resulting in a softer, more elastic, and forgiving feel on the water. They are known for being very durable and resistant to snapping, making them ideal for wave sailing and rough conditions where the mast needs to flex considerably. For cambered sails, RDM masts facilitate easier and smoother rotation of the cams, which is beneficial for maneuvers like tacks and gybes. They are generally recommended for smaller sails, lighter riders, and those who prefer a more forgiving rig. Historically, Loftsails was one of the first brands to achieve World Cup and speed tour wins with RDM-compatible race sails when SDM was the norm for racing.
02 SDM masts
These have a larger diameter with thinner walls, providing a crisper, more rigid, and direct feel. They maintain more profile definition in the sail when downhauled and are often preferred by bigger, more aggressive riders using larger sail sizes in flat water conditions, as they can handle more direct body weight pressure. While they might be perceived as less forgiving, they offer a powerful and direct connection to the rig, which some competitive sailors prefer for outright speed.
Mast Specifications
| Size | Weight (kg) | Carbon Fiber | Base % | Top % | Finishing | Stiffness IMCS |
|---|---|---|---|---|---|---|
| 340 cm | 1,80 | T700 | 64 | 76 | Standard Matte | 14 |
| 370 cm | 2,10 | T700 | 64 | 76 | Standard Matte | 17 |
| 400 cm | 2,25 | T700 | 64 | 76 | Standard Matte | 19 |
| 430 cm | 2,50 | T700 | 64 | 76 | Standard Matte | 21 |
| 460 cm | 2,90 | T700 | 64 | 76 | Standard Matte | 25 |
* Operating weights +/- 6%.
Loftsails Windsurf Mast FAQ
Compare the IV mast families, diameters, and listed lengths, then check stock on the product page.
The IV range includes Spark C50, Vision C75, and Team Edition C100. Each family has its own product page and length selector.
These names identify carbon content: Spark IV C50 has 50% carbon, Vision IV C75 has 75%, and Team Edition IV C100 has 100%.
Spark IV comes in RDM (reduced diameter). Vision IV and Team Edition IV come in both RDM and SDM (standard diameter).
The IV masts linked on this page include a mast bag.
Spark IV C50 RDM is listed in 340, 370, 400, 430, and 460 cm. Select a length on the product page to check stock.
Vision IV C75 RDM is listed in 340, 370, 400, 430, 460, and 490 cm. SDM is listed in 400, 430, 460, 490, and 520 cm. Select a length on the product page to check stock.
Team Edition IV C100 RDM is listed in 340, 370, 400, 430, 460, 490, and 520 cm. SDM is listed in 370, 400, 430, 460, 490, 520, 530, and 550 cm. Select a length on the product page to check stock.
