Chinook Windsurfing Mast Extension RDM US Cup
£89.95 – £99.95Price range: £89.95 through £99.95
- Unconditional 12 month warranty
- Large brass rollers significantly reduce friction and give easy down hauling.
- New easy to use Composite Snap Collar, eliminates lost pins and collars and can be quickly adjusted with one hand
- Large finger friendly metal release button – with a good positive action.
- Finished in a stunning blue anodized outer coating.
- Highly visible and durable height adjustment markings.
- High grip clam cleat and quality downhaul rope.
SKU:
N/A
Categories: Chinook, Mast Extensions
Additional information
| Type | RDM |
|---|---|
| Size | 12cm, 28cm, 38cm |
| Rope | Standard Downhaul (Free) |
| Brand | Chinook |
| Construction | Aluminium |
Reviews (0)
Be the first to review “Chinook Windsurfing Mast Extension RDM US Cup” Cancel reply
Shipping & Delivery
CLICK AND COLLECT:
If you are located in the UK at the checkout you will be able to select to collect from our Gosport Store
COURIERS WE USE:
Royal Mail for small and medium parcels
DPD for medium items like kites, harnesses and iSUPs
UPS, FedEx & Parcel Force for larger items like booms masts and boards
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.
OUTSIDE UK: Please contact us if you would like something posted outside the UK.
EU Postage: Currently all EU items are attracting duty fees in your country and for this reason our webstore is not setup for orders to the EU but if you would like to purchase from us please.
RETURNS: You are responsible for returning items to us and if a refund is required we will refund only the value of the item and not the postage. Returns must be made within 14 days unless the item is deemed faulty.
RETURNS ADDRESS:
Andy Biggs Watersports
103 Bury Road
Alverstoke
Gosport
PO12 3PR
Please make sure to include your name so we can match up with your original order
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.
You may also like…
Downhaul Outhaul Inhaul for Windsurfing 3.8mm Dyneema ‘Formuline’ Downhaul Rope
£3.60 – £72.00Price range: £3.60 through £72.00
In stock
This stuff is super smooth and lasts for a very long time compared to standard downhaul.
£3.60 per metre.
We will ship this is one total length. Please contact us if you would like it pre cut to particular lengths.
What length to buy if you are not sure:
- Downhaul 1.5 or 2m
- Outhaul 1m
- Inhaul (around the front end mast clamp) 1m
Select options
This product has multiple variants. The options may be chosen on the product page
Related products
Severne Triple Xtension HD RDM
£109.00 – £119.00Price range: £109.00 through £119.00
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
Select options
This product has multiple variants. The options may be chosen on the product page
Chinook Windsurfing Mast Extension SDM US Cup
£89.95 – £99.95Price range: £89.95 through £99.95
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
Select options
This product has multiple variants. The options may be chosen on the product page
Chinook Windsurfing Mast Extension SDM Euro Pin
£69.95 – £99.95Price range: £69.95 through £99.95
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
Select options
This product has multiple variants. The options may be chosen on the product page
Radz Windsurfing Mast Extension SDM
£53.95 – £59.95Price range: £53.95 through £59.95
In stock
Radz Windsurfing Mast Extension SDM
Does not come with downhaul! Please remember to add standard downhaul or formuline downhaul to your order.
Mast extension incorporating a euro pin base.
Available in RDM or SDM and in sizes - 15cm, 30cm and 45cm
Select options
This product has multiple variants. The options may be chosen on the product page
Severne Cyclops RDM Carbon Mast Extension 24+36cm
£215.00 – £235.00Price range: £215.00 through £235.00
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
Select options
This product has multiple variants. The options may be chosen on the product page
Chinook inflight outhaul kit
£69.95
Only 1 left in stock
- Everything you need to adapt a Chinook or any other boom into a low friction, 8 to 1, on-the-fly out-haul system
- Includes 2 cleats, double sail pulley, 4mm pre-stretched line (1-12’,2-5’ lengths), two Ronstan pulley blocks, and 2 T-handles
- Compatible with modern race booms that have three integrated outhaul pulleys
- Modern high performance sails often benefit from adjustable outhaul;
- Different wind angles (broader = looser)
- Wind strengths (stronger = tighter)
- You'll be amazed at the difference it makes!
- All serious racers use in-flight adjustable outhauls
- Fantastic for ALL performance blasters
Ding Epoxy Board Repair Stick from Chinook
£15.95
In stock
Chinook Windsurfing Fixed Harness Lines
£23.95
In stock
Designed with no swing, precise sizing, and very low-profile styling.
Available in 24'' 26'' 28'' 30'' 32" 34''
Select options
This product has multiple variants. The options may be chosen on the product page
Pro 1 Alloy Chinook Windsurfing Boom (135-197 Only)
Temporarily out of stock, please call - 023 9258 2614
Please note that the colour of the Pro 1 Alloy can vary on size. Please call us to check on colour.
- Standard Pro-1 Head fits SDM or RDM
- New stiffer 62cm tail piece will fit many sails in your quiver
- 29mm Diameter Grip
- High durability
- 2-Pin tail piece hinged adjustment collars – One hand friendly
- Monocoque custom alloy body. Wide angled bend curve through front end for easy rig handling during tacks and gybes
- Outstanding torsional rigidity and stiffness
- New loop-n-go outhaul block for quick, centred sail position
- Built-in excess rope retention
- Harness line index markings
- Absolute boom length markings on blue anodized continuous tail piece
- Positive “snap-in and leave” skinny adapter for use with RD masts (14cm long)
- Foam-filled tubing keeps water out
Select options
This product has multiple variants. The options may be chosen on the product page

Reviews
There are no reviews yet.