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
Chinook Windsurfing Carbon Mast Extension RDM US Cup
£145.99 – £155.99Price range: £145.99 through £155.99
In stock
The Chinook Sailing Carbon US Cup-RDM-Tall 32cm and 46cm Extensions are elegant and very strong. A new easy to use Composite Snap Collar system eliminates lost pins or collars and can be quickly adjusted with one hand. All extensions come with the proven US Power-Haul pulley and cleat system and 2 cm adjustment increments.
- Adds maximum of 32cm/46cm to mast length
- Reduced Diameter
- US Basecup
- Large brass pulleys for increased leverage
- Stronger than aluminum
Select options
This product has multiple variants. The options may be chosen on the product page
Chinook Windsurfing Carbon Mast Extension SDM Euro Pin
£145.95 – £155.95Price range: £145.95 through £155.95
In stock
Improved lay-up and manufacturing process! Our lightest extensions come with a Six Pin adjusting collar and are stronger than ever with reinforced sidewalls. All come with the proven Euro-Pin EX Power-Haul pulley and cleat system and 2 cm adjustment increments.
- Unconditional 12 month warranty
- Ultra Lightweight.
- Redesigned with stronger than ever reinforced side walls.
- Large brass rollers significantly reduce friction and give easy downhauling.
- Fully adjustable, easy to use slim line snap-on collar.
- Large finger friendly metal release button - with a good positive action.
- Highly visible and durable height adjustment markings.
- High grip clam cleat and quality downhaul rope.
Select options
This product has multiple variants. The options may be chosen on the product page
Streamlined RDM Windsurfing Mast Extension
£99.95 – £109.95Price range: £99.95 through £109.95
Temporarily out of stock, please call - 023 9258 2614
Aluminium
Red-line extensions start with custom 32 millimeter, 6061 T-8 “drawn” aluminum tubing. The kind of tubing they use to make aircraft. Our tubing is engineered so that with its large diameter, the wall thickness can be thinner so the overall result is an incredible high strength, to low weight ratio. This formula has been proven with our years of experience. The holes are precision punched, then the tube is red anodized in and out, permanent laser numbered 2 centimeter settings. The adjustment settings are held with a hard anodized aluminum collar tethered with a spectra line to a stainless steel pin. Fail-safe and virtually break proof. Finally we attach our new beefy “Power-Six” super powerful 6:1 downhaul cleat with large diameter pulleys, perpendicular for power, easy rigging and no crossed lines. A tough Dyneema “super downhaul” line is included.
Select options
This product has multiple variants. The options may be chosen on the product page
Chinook Windsurfing Carbon Mast Extension RDM Euro Pin
£119.95 – £155.95Price range: £119.95 through £155.95
In stock
Probably the most highly regarded extensions on the market.
- Ultra light weight
- Elegant and very strong
- New easy to use Composite Snap Collar eliminates lost pins and can be quickly adjusted with one hand
- Large brass rollers significantly reduce friction and give easy down hauling
- Fully adjustable, easy to use collar, with pin & line
- Large finger friendly metal release button - with a good positive action
- Highly visible and durable height adjustment markings
- High grip clam cleat and quality downhaul rope
- Stylish gloss finish
Select options
This product has multiple variants. The options may be chosen on the product page
Radz Windsurfing Mast Extension RDM
£52.95 – £59.95Price range: £52.95 through £59.95
In stock
Radz Windsurfing Mast Extension RDM
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 Wave Grenade HD Alloy Windsurfing Mast Extension 24cm+36cm
£109.00 – £119.00Price range: £109.00 through £119.00
In stock
WAVE GRENADE ALUMINIUM 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 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.
Select options
This product has multiple variants. The options may be chosen on the product page
Severne Wave Grenade HD Carbon Windsurfing Mast Extension 24cm+36cm
£215.00 – £235.00Price range: £215.00 through £235.00
In stock
WAVE GRENADE CARBON 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 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.
Select options
This product has multiple variants. The options may be chosen on the product page
RDG Alloy Chinook Windsurfing Boom
£239.00 – £245.00Price range: £239.00 through £245.00
In stock
- Reduced Diameter Grip
- 27mm - comfort and grip
- New - Expanded adjustment range - 60cm, 135-195cm
- New stiffer, straighter tail piece
- New green graphics and anodising - snazzy
- New Loop-n-go - quick, centred sail position with rope retention
- Pro-1 head fits SDM or RDM
- Monocoque body
- Non tapered design
- Fully Articulating Pro-1 Head, reduces strains on mast and sails
- Absolute boom length markings on green anodized continuous tail piece
- 2-Pin stainless steel vertical slide tail piece adjustment collars
- Positive “snap-in and leave” skinny adapter for use with RD masts (14cm long)
- Modern bend curve makes hand transitions during manoeuvres feel natural
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.