Name: ION Radium Windsurfing Harness
Brand: ION
SKU: 9010583223803
Price: 316.0 EUR
Availability: InStock

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Description

ION Radium Harness

The Radium hip harness is the ultimate choice for windsurfers who demand the highest levels of performance and comfort. Now equipped with the brand-new Spectre Bar 2, it offers exceptional load distribution and flexibility to ensure superior control and responsiveness during high-performance sessions. Thanks to its hybrid shell construction, the Radium combines rigid elements with soft materials, offering the perfect blend of support and freedom of movement. Professional windsurfers like Victor Fernandez choose the Radium as the most popular harness in ION’s windsurfing collection because it delivers pro-level precision and comfort for the most demanding riders. The soft Neo strap and lightweight PVC buckles provide even more comfort and ensure an optimal fit. Whether you’re pushing your limits or seeking top-notch performance—the Radium is designed for the ultimate windsurfing experience.

All Harnessess are shipped complete. The package includes: Spreader Bar (with hooks)

Manufacturer

Boards & More GmbH
Rabach 1, A-4591 Molln
Österreich
office@boards-and-more.com
+43 7584 403 0

Reviews

ION Radium Windsurfing Harness

$316.00

Exportpreis ohne MwSt. Shipping calculated at checkout

Select color

Blau
Schwarz
Grau

Select size

48/S 48/S
50/M 50/M
52/L 52/L
54/XL 54/XL

Size Chart

Pre-order Available Delivery as soon as the item is available.

Quantity

60-Day Return Policy

Free Return Shipping

After-Sales Service

Shipping & Returns Information

Within Germany:
Free shipping on orders of €50 or more*

International:
Free shipping on orders of €100 or more*

Click here for more information and shipping rates

Returns

We offer you an extended 60-day return policy.

If you’d like to return your order, you can easily get your return label through your customer profile.

The return label is free for you, and your shipping costs will also be refunded.

Description
Manufacturer
Reviews

ION Radium Harness

All Harnessess are shipped complete. The package includes: Spreader Bar (with hooks)

Boards & More GmbH
Rabach 1, A-4591 Molln
Österreich
office@boards-and-more.com
+43 7584 403 0

ION Radium Windsurfing Harness

$316.00

ION Size Chart

Wetsuits

Men's Wetsuits

Size	EURO	Height (cm)	Weight (kg)	Chest (cm)
XS	46	169–175	54–62	88–93
S	48	172–178	62–70	93–98
STall	94	179–184	65–74	92–98
MSmall	25	167–174	66–75	98–104
M	50	175–181	70–78	98–103
MTall	98	182–189	73–82	97–103
L (Small)	26	170–177	74–83	103–109
L	52	178–184	78–86	103–108
LTall	102	185–192	81–90	102–108
XLSmall	27	173–180	82–91	108–114
XL	54	181–187	86–94	108–113
XL Tall	106	188–195	89–98	107–113
XXL Small	28	176–183	90–98	113–119
XXL	56	184–190	94–102	113–118
3XL	58	186–193	102–111	118–125
4XL	60	187–196	111–120	125–134

Women's Wetsuits

Size	EURO	Height (cm)	Weight (kg)	Chest (cm)
XXS	32	155–161	41–49	76–81
XS	34	157–165	46–54	80–85
S	36	161–170	53–61	84–89
M/Short (MS)	19	158–167	60–70	88–93
M	38	166–175	60–69	88–93
M/Tall (MT)	76	174–185	64–73	88–93
L	40	170–180	64–75	92–97
L/Tall (LT)	80	176–190	72–80	92–97
XL	42	174–190	75–90	96–101
XXL	44	176–190	77–100	100–105

Wetsuits for Kids

Size	Height (cm)	Weight (kg)	Chest (cm)
4	104–112	15–22	55–60
6	113–123	21–28	60–65
8	124–134	27–34	65–70
10	135–145	33–40	70–75
12	146–155	39–46	75–80
14	156–165	45–52	80–85
16	166–176	51–58	85–90

Harnesses

Harnesses 3D Fit Men's

Size (EU/cm)	Waist (cm)	Back Length	Spreader Bar Size (cm)
46/XS	66–76	-	22
48/S	74–84	≤48	22
49/STall	74–84	>48	22
50/M	82–92	≤50	25
50/MTall	82–92	>50	25
52/L	90–100	≤52	28.5
52/L Tall	90–100	>52	28.5
54/XL	98–108	-	32

Harnesses 3D Fit Women's

Size (EU/cm)	Waist (cm)	Back Length	Spreader Bar Size (cm)
34/XS	56–68	-	22
36/S	66–76	≤ 45	22
72/STall	66–76	>45	22
38/M	74–84	≤46	25
76/MTall	74–84	>46	25
40/L	82–92	-	28.5

Men's Hip Harnesses

Size	Waist (cm)	Spreader Bar Size (cm)
XS/46	66–76	22
S/48	74–84	22
M/50	82–92	25
L/52	90–100	28.5
XL/54	98–108	32
XXL/56	106–116	32

Women's Hip Harnesses

Spreader Bar Size (cm)	Size	Waist (cm)
22	XS/34	55–68
22	S/36	66–76
25	M/38	74–84
28.5	L/40	82–92

Rogue Wing Trapeze

Size (EU/cm)	Size (cm)	Waist (cm)
S-M	48–50	70–90
L-XL	52–54	90–110

Junior Trapeze Size

Size	Waist circumference (cm)	Age (years)
XXXS/104	50–56	6–9
XXS/116	55–61	8–12
XS/128	60–66	10–14

WHICH SPECTRE BAR IS RIGHT FOR MEN

Size (Trapeze)	Waist (cm)	Spreader Bar Width (cm)
XS	66–76	22
S	74–84	22
M	82–92	25
L	90–100	28.5
XL	98–108	32
XXL	106–116	32

SPECTRE BAR WOMEN

Size Trapeze	Waist (cm)	Spreader Bar Width (cm)
XS	56–68	22
S	66–76	22
M	74–84	25
L	82–92	28.5

Tops

Men's Tops

Size	Sleeve Length (cm)	Chest circumference (cm)	Waist (cm)	Lower waist circumference (cm)	Hip circumference (cm)
XS	70–72	86–90	75–79	76–80	86–90
S	73–75	91–95	80–84	81–86	91–96
M	76–78	96–100	85–89	87–92	97–102
L	79–81	101–105	90–94	93–98	103–108
XL	82–84	106–110	95–99	99–104	109–114
XXL	85–87	111–115	100–104	105–110	115–120

Women's Tops

Size	Sleeve Length (cm)	Bust (cm)	Waist circumference (cm)	Lower waist circumference (cm)	Hip circumference (cm)
XS	65–67	80–84	60–64	72–77	87–92
S	68–70	85–89	65–69	78–83	93–98
M	71–73	90–94	70–74	84–89	99–104
L	74–76	95–99	75–79	90–95	105–110
XL	77–79	100–104	80–84	96–101	111–116

Bottoms

Men's Bottom Wear Sizes

Size	Lower waist circumference (cm)	Hip circumference (cm)	Inseam (cm)
XS	75–80	85–90	77–82
S	81–86	91–96	83–85
M	87–92	97–102	86–88
L	93–98	103–108	86–88
XL	99–104	109–114	86–88
XXL	105–110	115–120	89–91

Women's Pant Sizes

Size	Lower waist circumference (cm)	Hip circumference (cm)	Inseam (cm)
XS	72–77	87–92	77–79
S	78–83	93–98	80–82
M	84–89	99–104	80–82
L	90–95	105–110	80–82
XL	96–101	111–116	83–85

Shoes & Booties

Boots / Shoes

Euro (cm)	USA	UK	Approx. Foot Length (CM)
36	5	4	22
37	6	5	23
38–39	7	6	24
40–41	8	7	25
42	9	8	26
43–44	10	9	27
45–46	11	10	28
47–48	12	11	29

Accessories

Gloves

Size	Ankle circumference (cm)
XS	19.5
S	20.5
M	21.5
L	22.5
XL	23.5
XXL	24.5

Beanies

Size	Inner circumference (cm)
XXS	50–54
XS	52–56
S	54–58
M	56–60
L	58–61
XL	60–62

Hats

Size	Head circumference (cm)
XXS	50–54
XS	52–56
S	54–58
M	56–60
L	58–61
XL	60–62

Poncho

Size	Height (cm)
S	135–175
L	165–300

Helmets & Vests

Women's Vests

Size	Height (cm)	Chest (cm)
XS	158–164	72–82
S	162–170	80–90
M	168–176	88–97
L	174–182	97–108
XL	180–188	106–116

Men's Vests

Size	EU	Height (cm)	Chest (cm)
Youth 1	8	124–134	46–56
Youth2	10	140–154	56–66
Youth3	12	152–166	66–76
XS	46	164–170	72–82
S	48	168–174	80–90
M	50	172–178	88–99
L	52

176–184 97–108 XL 54 182–189 106–116 XXL 56 187–194 114–125 XXXL 58 192–200 123–132

Helmets

Size	Head circumference (cm)
XS	51–54
S-M	53–56
M-L	55–61

Board Bag

Core Twintip Board Bag

Max. Board Length	Length (cm)	Width (cm)	Weight (kg)
137×43 cm	142	48	1
143 × 45 cm	148	50	1.1
166 × 49 cm	169	54	1.4

Core Wake Board Bag

Size	Max. Board Length (cm)	Max. Board Width (cm)	Length (cm) (cm)	Width (cm) (cm)	Height (cm) (cm)	Weight (kg) (kg)
148 × 45 cm	148	45	155	48	25	1.6

Wake Board Bag Core

Size	Max. Board Length	Length (cm)	Width (cm)	Height (cm)	Weight (kg)
148	148 × 45 cm	155	48	25	2.95

Core SUP Board Bag

Size	Max. Board Length (cm)	Max. Board Width (cm)	Length (cm)	Width (cm)	Weight (kg) (kg)
8′2″ x 28.5″	0–254	0–72	273	87	2.6
9′0″ x 32″	255–275	73–82	290	100	2.9
9'5" x 33"	276–288	83–84	300	100	3.0
9′6″ x 31″	289–290	85–79	303	91	3.1
10′0″ x 33″	291–305	80–84	320	98	3.3
10′6″ x 31″	306–320	0–79	333	91	3.6
11′6″ x 34″	231–351	80–86	364	102	3.8

SUP / Wing Core Stubby Board Bag

Size	Max. Board Length (cm)	Max. Board Width (cm)	Length (cm)	Width (cm)	Weight (kg) (kg)
4′8″ x 23″	0–142	0–58	155	70	1.7
5′2″ x 25″	143–158	59–63.5	169	75	1.8
5′4″ x 26″	159–163	64–66	173	86	1.9
6′0″ x 30″	164–186	67–77	193	96	1.9
6′11″ x 30″	187–211	0–77	226	100	2.1
8′3″ x 29″	212–253	0–74	253	74	2.6
8′10″ x 31.5″	154–270	0–80	270	80	2.8

SUP Board Bag Race Core

Size (ft/in)	Max. Board Length (cm)	Max. Board Width (cm)	Length (cm)	Width (cm)	Weight (kg) (kg)
12′6″	0-381	0-78	395	98	3.9

SUP Board Bag Race Tec

Size	Max. Board Length (cm)	Max. Board Width (cm)	Length (cm)	Width (cm)	Height (cm)	Weight (kg) (kg)
14′0″ x 26.5″	0-427	0–67	442	70	27	5.2
12'6" x 28.5"	0–427	0–67	442	70	27.5	5

Core Surf Board Bag

Size (ft/in)	Max. Board Size	Length (cm)	Width (cm)	Weight (kg)
5′6″	165 × 54 cm	180	67	1.3
5′8″	173 × 53 cm	183	68	1.35
6′0″	183 × 53 cm	193	68	1.4
6′5″	199 × 54 cm	209	69	1.5
6′10″	210 × 55 cm	219	70	1.7

Core Triple Surf Board Bag

Size (ft/in)	Max. Board Size	Length (cm)	Width (cm)	Height (cm)	Weight (kg)
6′8″	203*60 cm	206	63	22	3.4

Core Stubby Surf Board Bag

Size (ft/in)	Max. Board Size	Length (cm)	Width (cm)	Weight (kg)
5′2″	170 × 54 cm	174	68	1.25
5′6″	78 × 48.5 cm	182	59	1.3
6′0″	183 × 51 cm	190	61	1.4

Core Windsurf Board Bag

Max. Board Length	Length (cm)	Width (cm)	Weight (kg)	Fin Slots
230×58 cm	241	74	2	Thruster
235 × 61 cm	250	75	2.1	Thruster
240 × 66.5 cm	255	82	2.2	Thruster
245 × 73 cm	255	90	2.3	Single Fin
250 × 79 cm	263	93	2.5	Single Fin
255 × 85 cm	267	100	2.7	Single Fin

Core Stubby Windsurf Board Bag

Max. Board Length	Length (cm)	Width (cm)	Weight (kg)	Fin Slots
215×58 cm	218	73.5	1.9	Thruster
230 × 63 cm	233	74	2.1	Thruster
235 × 70 cm	241	82	2.3	Single Fin
238 × 78 cm	240	91	2.5	Single Fin
236 × 100 cm	241	117	3.2	Single Fin

Core Double Windsurf Board Bag

Size	Max. Board Length (cm) (cm)	Max. Board Width (cm) (cm)	Length (cm) (cm)	Width (cm) (cm)	Height (cm) (cm)	Weight (kg) (kg)
245x65 cm	0–245	0–65	250	68	20	3.85
250x85 cm	246–250	66–85	255	88	25	4.4

WING BOARDBAG CORE

Sizes	Max. Board Length (cm)	Max. board width (cm)	External bag length (cm)	External bag width (cm)	Weight (kg)
4'6" x 21"	0–137	0–53	147	62	1.6
4'9" x 23"	138–145	54–61	155	70	1.7
5'3" x 26"	146–160	62–66	169	75	1.8
5'5" x 27"	161–165	67–68	173	86	1.9
6' 0" x 30"	166–186	69–77	193	96	1.9
6'11" x 30"	187–211	69–77	226	100	2.1

Wing sock

Size	Max. board length (cm)	Max. board width (cm)	Weight (kg)
5'5	0–165	0–48.5	0.5

Surf sock

Size	Max. board length (cm)	Max. board width (cm)	Weight (kg)
5'9	0–175	0–48	0.5

Surf Sock Stubby

Size	Max. Board Length (cm)	Max. Board Width (cm)	Weight (kg)
53	0–160	0–48	0.6

Luggage

Gearbag Tec

5′4″	0–160	0–72	167	72	28	4.6	1 foilboard + 2 wings
6′0″	161–185	0–53	190	55	35	4.6	1 surfboard + 4 kites
6′3″	186–190	0–72	195	72	35	4.6	1 foilboard + 3 wings
6′8″	191–205	0–72	208	72	35	5.6	1 foilboard + 4 wings

Gearbag Core

Size	Max. Board Length (cm)	Max. board width (cm)	Length (cm)	Width (cm)	Height (cm)	Weight (kg)	Luggage
139	0–140	0–43	142	48	40	3.6	1 board + 4 kites
152	141–153	44–47	155	48	40	3.8	1 board + 4 kites
165	154–167	48–50	170	52	40	3.9	1 board + 4 kites
186	168–186	51–53	190	55	40	4.1	1 board + 4 kites

Gearbag Tec Golf

Size (cm)	Max. Board Length (cm)	Max. board width (cm)	Length (cm)	Width (cm)	Height (cm)	Weight (kg) (kg)	Gear
145	0–145	0–45	148	47	38	3.75	1 board + 4 kites
165	146–164	46–47	168	50	40	4.15	1 board + 4 kites

Gearbag Tec

Size (ft/in) (ft/in)	Max. Board Length (cm)	Max. Board Width (cm)	Length (cm) (cm)	Width (cm) (cm)	Height (cm) (cm)	Weight (kg) (kg)	Gear
5′0″	0–150	0–69	157	72	28	4.2	1 board + 3 wings
5′4″	0–160	0-69	167	72	28	4.6	1 board + 3 wings
5′9″	0–180	0-69	187	72	35	5	2 boards + 3 wings
6′3″	0-190	0-69	195	72	35	5.3	2 boards + 3 wings
6′8″	0-205	0-69	208	72	35	5.6	2 boards + 3 wings

Gearbag Tec

Gear	Size (ft/in) (ft/in)	Max. Board Length (cm)	Max. Board Width (cm)	Length (cm) (cm)	Width (cm) (cm)	Height (cm) (cm)	Weight (kg) (kg)
1 board + 4 kites	6′0″	161–185	0-53	190	55	35	4.6

Mission Pack

Size	Length (cm)	Width (cm)	Height (cm)	Volume (L)	Weight (kg)
40 L	35	25	49	40	1.02

Session Bag

Size	Length (cm)	Width (cm)	Depth (cm)	Weight (kg)
80L	55	37	40	0.45

Suspect Duffel Bag


Size	Length (cm)	Width (cm)	Height (cm)	Volume (L)	Weight (kg)
90 L	90	45	40	90	1.56

Wheelie

Size	Length (cm) (cm)	Width (cm) (cm)	Height (cm)	Volume (L)	Weight (kg) (kg)
S	56	35	23	35	3.12
M	64	37.5	45(+5)	65(+10)	4.35
L	90	40	35	110	5.15

Not sure if this product is right for you?

Mario and the Wind Lounge team are happy to help you. Together, we’ll figure out what’s really right for you.
Feel free to fill out the contact form and tell us a little about your riding area, your riding style, and your current gear.
The more we know, the better the advice we can give you. We’ll then get in touch with you personally.

ION

By water sports enthusiasts, for water sports enthusiasts

ION was founded in 2004 based on a simple conviction: Those who are out on the water themselves know best what’s needed there. Founded by windsurfers and kitesurfers who knew the market and weren’t satisfied with the existing gear, it all began with wetsuits and harnesses for the international kite, surf, and wakeboard scenes. From the very beginning, the result was different: high-quality products with a clean, progressive design that doesn’t look like sports gear, but rather reflects a lifestyle.

Today, ION is the global market leader for wetsuits and Harnesses in the windsurfing and kitesurfing world—and remains part of the Boards & More Group, which embodies the full spectrum of water sports.

More than one product category

ION doesn’t think in terms of sports. The brand’s identity can’t be reduced to kitesurfing, windsurfing, or Wing foiling—it’s about challenging yourself, experiencing nature, and feeling what gravity and the wind do to you. Whether someone is riding a slalom board, pulling a kite behind them, or gliding on a Foil, it doesn’t matter to ION. What counts is the feeling behind it. This mindset is embedded in every product: from the seams of a wetsuit to the geometry of a harness frame. And it explains why ION products so often work across different sports—not because it was intentional, but because they were developed by people who are themselves at home in all disciplines.

Living as You Grow

What sets ION apart from many other brands is the consistency with which it lives out its own philosophy internally. Employees at the Munich headquarters get time off when the wind picks up—because a real session on the water is more valuable than any feedback form. Anyone who wants to can work remotely for two weeks pro a year from a kitesurfing spot anywhere in the world. This isn’t just a perk on paper—it’s a living reality: The gear is worn, put through its paces, and tested under real-world conditions by our own people—not through QA processes, but through real sessions in real wind. Anything that doesn’t work in these conditions doesn’t make it into production. Anything that excites us does. This isn’t marketing. It’s our structure—and the reason why ION products are so consistently designed for what’s actually needed on the water.