Severne Wave Grenade HD Alloy Windsurfing Mast Extension 24cm+36cm
£109.00 – £119.00Price range: £109.00 through £119.00
WAVE GRENADE ALUMINIUMÂ 36cm / 24cm
OUR NO COMPROMISE WAVE GRENADE CARBON HAS BEEN REDESIGNED FOR THE ULTIMATE DURABILITY.
Tube diameter and wall thickness have been increased for incredible reliability.
WAVE GRENADE HD Â 36cm / 24cm
HEAVY DUTY
HD stands for Heavy Duty. The new WAVE GRENADE HD has 36cm or 24cm of adjustment for better compatibility with our wave sail range. We analyzed the need for more reliable tubes over this increased length and tested a variety of Aluminum specification. We decided on a wall thickness 33% thicker and an increased outside diameter, for the ultimate durability against bending and breaking.
| Size | 24cm, 36cm |
|---|---|
| Type | RDM |
| Brand | Severne |
CLICK AND COLLECT:
- If you are located in the UK at the checkout you will be able to select to collect from our Store in Gosport.
COURIERS WE USE:
- Royal Mail for small and medium parcels
- Parcel Force for medium items like kites, harnesses and iSUPs
- UPS, DHL & Parcel Force for larger items like booms masts and boardLarge items such as boards, booms and masts will be delivered in 3-5 days as bigger vehicles are required by the couriers and can induce delays.
DISPATCH: All items are dispatched from our Gosport Store and will experience a 24hr delay where we are closed on Tuesdays. Any orders taken after 1pm on Friday and over the weekend will be dispatched on Monday.
EU and Worldwide Postage: EU and Worldwide items are priced without VAT. Our webstore is not setup for orders outside the UK but if you would like to purchase from us please email us with your details and we will reply with a postage quote. Payment is required by Bank Transfer.
RETURNS: Use the address below for returns. If a refund is required we will refund only the value of the item(s) and not the postage. Returns must be made within 14 days unless the item is deemed faulty. Please include the original shipping label as this will have the order reference and you name on it.
RETURNS ADDRESS:
Andy Biggs Watersports
103 Bury Road
GOSPORT
PO12 3PR
DAMAGED ITEM: If an item is damaged in transit you must notify the us immediately upon delivery and let us know as soon as you can.
Related products
Severne Triple Xtension Carbon RDM
In stock
TRIPLE XTENSION
3 PULLEY RDM EXTENSION.
With more people running freeride and slalom sails on RDM masts, the necessity for a 3-pulley RDM extension became obvious.
Design focused on reducing downhaul friction for easier rigging. Careful attention to rope alignment and pulley spacing has enabled significant improvements. Perfectly matched to any sail with the 4-roller tack pulley, the Triple Xtension also suits sails with the 3-roller tack pulley. Other features include Dyneema rope and an integrated hook to anchor the tack strap.
/ ALIGNED TRIPLE PULLEYS
/ STAINLESS STEEL BUTTON AND MECHANISM
/ STAINLESS STEEL AUTOMATIC HINGED COLLAR SYSTEM
/ ZERO CM SETTING
Severne Enigma Carbon Windsurfing Wave Boom
In stock
THE LIGHTEST, STIFFEST AND MOST DURABLE BOOM IN EXISTENCE. AVAILABLE IN WAVE, FREEMOVE AND RACE PROFILES
The custom carbon manufacture of the Enigma booms has one main objective; to produce the best stiffness to weight ratio. Unique methods have been developed to enhance the manufacture with every boom built individually with the emphasis on technology, not mass production.
ENIGMA Hardware transforms your entire rig; the ultimate combination of lightweight, stiffness, ergonomics and geometry.
Severne RDM Hinged Collar Band for Severne RDM & SDM Extensions
In stock
Chinook Windsurfing Mast Extension SDM US Cup
In stock
The new Six Pin adjusting collar and anodized logo/index markings are some of the unique and innovative features that make these the most popular extensions on the market. Standard with the proven US Power-Haul pulley and cleat system and 2 cm adjustment increments.
- Unconditional 12 month warranty
- Adds maximum of 12cm to mast length
- Standard Diameter
- US Basecup
- Large brass pulleys for increased leverage
Chinook Windsurfing Mast Extension SDM Euro Pin
In stock
The new Six Pin adjusting collar and anodized logo/index markings are some of the unique and innovative features that make these the most popular extensions on the market. Standard with the proven Euro-Pin EX Power-Haul pulley and cleat system and 2 cm adjustment increments.
- Standard Diameter
- Euro-Pin EX
- Stainless steel button engages three sides of Euro-Pin for safer attachment
- Large brass pulleys for increased leverage
Severne Cyclops HD RDM Aluminium Mast Extension 24+36cm
In stock
Severne Cyclops RDM Mast Extension
RIG YOUR SAIL IN UNDER 1 MINUTE
The CYCLOPS extension has a single pulley for rapid loop ‘n go rigging. Simply pass the loop of rope through the tack pulley on the sail and hook it over the single pulley on the extension. A single pull applies full downhaul tension in seconds.
All the ropes and pulleys are kept in perfect alignment to eliminate a lot of the friction and makes up for any loss of leverage from less pulleys.
A built-in handle negates the need for any tool, and stuff into the downhaul pocket on the sail.
Formuline rope is used to further reduce friction and minimize rope wear.
Faster, simpler rigging.
- SINGLE LOOP-GO PULLEY
- EFFICIENT PULLEY ALIGNMENT
- NEW STAINLESS STEEL AUTOMATIC COLLAR
- STAINLESS STEEL BUTTON AND MECHANISM
- ZERO CM SETTING
2025 Severne RDM Blue Carbon Windsurfing Mast
In stock
RDM BLUE
The RDM Blue has an added fibreglass outer layer which makes it stronger and less susceptible to impact damage. Also offers wave mast durability for freeride and RDM Cam sails. (OverDrive, Turbo GT)
- LIGHTWEIGHT (1.5KG FOR 400)
- TORAY PRE-PREG CARBON
- +7 MEASURED OFFSET ACCURACY
2025 Severne Gorilla G2 RDM Carbon Windsurfing Mast
In stock
GORILLA G2
Extreme durability, ultimate reliability. 2 year, no questions asked, limited warranty. The Gorilla G2 is an update to the legendary Gorilla mast. Still the same strength, now lighter. (1.65kg for 400)
- 2 YEAR NO QUESTIONS ASKED LIMITED WARRANTY
- INTERCHANGEABLE SECTIONS
- +7 MEASURED OFFSET ACCURACY

Reviews
There are no reviews yet.