Free shipping on non-board orders over $250 in the continental USA.
*Excludes 2012-2013 Neil Pryde sails and masts.

  • Maui Sails 190cm boom incurs a $60 surcharge.
  • Some sails larger than 8.5m2 incur a $60 surcharge
  • 520cm masts and booms longer than 190cm incur a $60 surcharge.
  • Applies to in-stock items only.
  • Does not apply to international orders.
  • Please email us or call us at 800-473-1153 for a rate quote.

For orders less than $250, the following applies:

Domestic Orders
  • To ensure you the lowest rate, we calculate the shipping cost and add it to your order manually.

Offshore Orders
  • Orders delivered outside the continetal US must be a minimum of $200.00.
  • This includes all international destinations and US zip codes to AK, HI, PR plus all US territories including APO, FPO and DPO addresses.
  • After you submit your order, we will email you a shipping rate quote for your approval before processing your order.

Expedited Delivery
Please enter expedited delivery instructions in the Special Instructions section when checking out.
RRD Booms 
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RRD offers a complete line-up of high performance windsurfing booms. The RRD boom designs feature premium materials, components, adjustment range, various boom grip diameter / type options, and the latest boom body shapes. Most RRD booms feature Monocoque (one-piece) boom bodies to foster the best performance available. Construction types include; Carbon, T-9 & T-8 Aluminum, in monocoque and 3-piece (T-8) constructions. The boom grip diameters vary by models and range between 24.5 - 30 mm in Carbon, 26-29mm in Aluminum. The VR-Slim at 24.5mm and MR at 26mm grip sizes are the smallest Carbon and Aluminum diameters in the industry. Small grip diameters aid control and reduce fatigue. They're ideal for cold water windsurfing environments, small hands, ease to grasp. The V series has 27mm-30mm, and the M series has 29mm grips. The larger diameter grips benefit longer length boom stiffness required with increased sail area loads. The V Series Carbon boom size 180 and 200 feature a subtle "V" in the grip / harness line area only - to maximize stiffness and minimize fatigue. RRD is Roberto Ricci Designs and represents Quality Innovation - Performance.

Isthmus Sailboards offers the following construction / models of RRD booms: Carbon: V, VR "Slim"series V2 (monocoque). Aluminum; T-9 M, MR series V1 & V2 (monocoque). Aluminum T-8 EV V2 (3-pc boom body). With over 30 years in the windsurfing business, we believe that these RRD booms provide the finest quality & performance windsurfing booms for the money.