Severne Wave Grenade HD Carbon Windsurfing Mast Extension 24cm+36cm
£215.00 – £235.00Price range: £215.00 through £235.00
WAVE GRENADE CARBONÂ 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 |
| Construction | Carbon |
| 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 Triple Xtension HD 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
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
2025 Severne SDM Apex Carbon Windsurfing Mast 5.30 NOW £599
In stock
The APEX mast has an added fibreglass outer layer which makes it less susceptible to impact damage.
The Apex taper has smaller diameter mid-sections with increased wall thickness for increased reliability.
/ SLIPLOK PREVENTS BOOM FROM SLIDING
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 SDM Arc Carbon Windsurfing Mast
In stock
ARC
Perfect for recreational racing and freeride, the ARC is our strongest SDM mast with dual outer fiberglass layers. Built on the Apex mandrel for a lighter, stronger mast.
- VALUE + PERFORMANCE
- INTEGRATED FERRULE
- TORAY PRE-PREG CARBON
- Â +7 MEASURED OFFSET ACCURACY
Severne Race HD Windsurfing SDM Mast Extension Alloy
In stock
RACE EXTENSION HD
FUNCTION AND RELIABILITY.
Solid Aluminium tubes combined with triple pulleys for friction free high tension downhauling.
Severne offers 3 sizes of the HD extension to compliment the race and freeride range.
24 CM - Mid range adjustability
36 CM - Extra length when required
ALIGNED TRIPLE PULLEYS
STAINLESS STEEL AUTOMATIC HINGED COLLAR SYSTEM
STAINLESS STEEL BUTTON AND MECHANISM
0CM SETTING

Reviews
There are no reviews yet.