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Home Motorcycle Motocross Helmets Just1 J39 Thruster Motocross Helmet

-14%

Just1 J39 Thruster Motocross Helmet

from Just1

Color: -

Black/White/Red
Black/White/Green
Black/White/Blue
Yellow/Red

Size: -

Please note: Helmets displayed with black or mirrored visors, will always be delivered with a clear visor!

£114.38

You save 14%

£98.48

Net price plus shipping; you may be liable for taxes & duties in the destination country

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How it works

Description
Size chart

Description

Just1 J39 Thruster Motocross Helmet

With its new lining and two shell sizes, the J39 adapts perfectly to your head.

Features:

High quality thermoplastic resin external shell
J.1.E.R. Emergency Cheek pad Removal System
Double d retention system
Removable and washable inner lining
Protx2™ antimicrobial technology new lining treatmnet
peak extension included
fully ventilated eps-lined chin bar
integrated vented roost guard
8 intake and 6 exhaust vents
ECE 22.06
Weight from 1350 gr

Specifications:

Shell types:

2 sizes - ABS Shell
3 sizes - EPS Shell

Additional product information

Features	Emergency system padding
Buckle	Double-D

Size chart

We want everything to fit right . Take some quick measurements if you are unsure of your current clothes size. The most accurate measurements will be those you take in your underwear, applying the measuring tape directly to your body.

Please note that the information in this size chart is not specific to the manufacturer's products as we currently do not have the manufacturer's original size chart. The details in the size charts are not binding and are for guidance only. If something does not fit you, of course you can exchange the goods with us (see FAQ Exchange / Complaint).

Men
Women
Helmet
Shoes & Boots
Gloves

Apparel for men

A. Body height:
Take off your shoes and stand barefoot with your back against a wall to measure your body height to the top of your head.

B. Chest circumference:
Measure horizontally around the widest part of your chest.

C. Waist circumference:
Measure horizontally around your waist.

D. Inside leg length:
Inside leg measured from the crotch to the ground.

Men (regular sizes)
Ordering Size	US size	Inch size	Body height (A)	Chest circumference (B)	Waist circumference (C)	Hip circumference	Inside leg length (D)
46	S	29/30	169-174	92-95	79-82	92-95	77,5-80
48	M	30/31	172-177	96-100	83-86	96-99	79-81,5
50	M	32/33	175-180	101-103	87-90	100-103	80,5-83
52	L	34	178-183	104-107	91-94	104-107	82-84,5
54	XL	36	180-185	108-111	95-98	108-111	83-85,5
56	XXL	38	182-187	112-115	99-102	112-115	84-86,5
58	XXL	40	184-189	116-119	103-107	116-119	85-87,5
60	3XL	42	186-191	120-123	108-112	120-123	86-88,5
62	3XL	-	188-193	124-127	113-117	124-127	87-89,5
64	4XL	-	190-195	128-131	118-122	128-131	88-90,5
66	4XL	-	192-197	132-135	123-127	132-135	89-91,5
68	5XL	-	194-199	136-139	128-132	136-139	90-92,5
70	5XL	-	196-201	140-143	133-137	140-143	91-93,5
72	6XL	-	198-203	144-147	138-142	144-147	92-94,5
74	7XL	-	200-205	148-151	143-147	148-151	93-95,5

Men (slim sizes)
Ordering Size	US size	Inch size	Body height (A)	Chest circumference (B)	Waist circumference (C)	Hip circumference	Inside leg length (D)
94	L-S	29/30	180-185	93-96	79-82	92-85	82,5-85
98	L-M	30/31	182-187	97-100	83-86	96-99	84-86,5
102	L-L	31/32	184-189	101-103	87-90	100-103	85-87,5
106	L-XL	33/34	186-191	104-107	91-94	104-107	86-88,5
110	L-XXL	36	188-193	108-111	95-98	108-111	87-89,5

Men (chunky sizes)
Ordering Size	US size	Inch size	Body height (A)	Chest circumference (B)	Waist circumference (C)	Hip circumference	Inside leg length (D)
24	K-S	32/33	168-173	98-100	87-90	100-103	74,5-77
25	K-M	33/34	170-175	101-103	91-94	104-107	76-78,5
26	K-L	36/38	172-177	104-107	95-98	108-111	77,5-80
27	K-XL	38	174-179	108-111	99-102	112-115	79-81,5
28	K-XXL	40	176-181	112-115	103-107	116-119	80-82,5
29	K-3XL	42	178-183	116-119	108-112	120-123	81-83,5
30	K-4XL	-	180-185	120-123	113-117	124-127	82-84,5

Men (C sizing)
Ordering Size	US size	Inch size	Body height (A)	Chest circumference (B)	Waist circumference (C)	Hip circumference	Inside leg length (D)
275	38	169-174	108-111	102-105	114-118	74-76,5
285	40/42	171-176	112-115	106-109	119-123	75-77,5
295	42	173-178	116-119	110-114	124-127	76-78,5
305	-	175-180	120-123	115-118	128-131	77-79,5
315	-	177-182	124-127	119-123	132-135	78-80,5
325	-	179-184	128-131	124-127	136-139	79-81,5
335	-	181-186	132-135	128-131	140-143	80-82,5
345	-	183-188	136-139	132-135	144-147	81-83,5
355	-	185-190	140-143	136-140	148-151	82-84,5

Apparel for women

A. Body height:
Take off your shoes and stand barefoot with your back against a wall to measure your body height to the top of your head.

B. Chest circumference:
Measure horizontally around the widest part of your chest.

C. Waist circumference:
Measure horizontally around your waist.

D. Inside leg length:
Inside leg measured from the crotch to the ground.

Women (regular sizes)
Ordering Size	US size	Inch size	Body height (A)	Chest circumference (B)	Waist circumference (C)	Hip circumference	Inside leg length (D)
34	DXS/XS	27	161-166	80-83	64-67	88-91	75-77,5
36	DS/S	27/28	163-168	84-87	68-71	92-95	76-78,5
38	DS/S	29	165-170	88-91	72-75	96-99	77-79,5
40	DM/M	30/31	167-172	92-95	76-79	100-103	78-80,5
42	DL/L	32/33	169-174	96-99	80-83	104-107	79-81,5
44	DXL/L	34	169-174	100-103	84-87	108-111	79-81,5
46	DXXL/XL	36	171-176	104-107	88-91	112-115	80-82,5
48	D3XL/XL	38	171-176	108-111	92-95	116-119	80-82,5
50	D4XL/XXL	40	171-176	112-115	96-99	120-123	80-82,5
52	D5XL/XXXL	42	172-177	116-119	100-103	124-127	81-83,5

Women (slim sizes)
Ordering Size	US size	Inch size	Body height (A)	Chest circumference (B)	Waist circumference (C)	Hip circumference	Inside leg length (D)
76	L-DS/S	29	173-178	88-91	72-75	96-99	81-84,5
80	L-DM/M	30/31	175-180	92-95	76-79	100-103	82-85,5
84	L-DL/L	32/33	177-182	96-99	80-83	104-107	83-86,5
88	L-DXL/L	33/34	179-184	100-103	84-87	108-111	84-87,5

Women (chunky sizes)
Ordering Size	US size	Inch size	Body height (A)	Chest circumference (B)	Waist circumference (C)	Hip circumference	Inside leg length (D)
19	K-DS/S	29	157-162	88-91	72-75	96-99	73-76,5
20	K-DM/M	30/31	159-164	92-95	76-79	100-103	74-77,5
21	K-DL/L	32/33	161-166	96-99	80-83	104-107	75-78,5
22	K-DXL/L	33/34	163-168	100-103	84-87	108-111	76-79,5
23	K-DXXXL/XL	36/38	165-170	104-107	88-93	112-115	77-80,5

Helmet sizes

A. Use a measuring tape around the widest point of your head (approx. 1 cm above the ears) to get the correct measurement for a helmet.

Apply the calculated value from the table.

Helmet sizes
Head circumference in cm (A)	48/50	51/52	53/54	55/56	57/58	59/60	61/62	63/64
Ordering size	XXXS	XXS	XS	S	M	L	XL	XXL

Shoes & Boots

A. Place both feet on a sheet of paper. Draw a vertical line to mark the tip and heel end of your foot.

B. Measure the lengths of both feet.

C. Compare the length of the bigger foot with the size table to find your perfect shoe size.

Shoe and boot sizes
Foot length in cm (B)	23,0	23,4	23,8	24,3	24,7	25,1	25,5
UK sizes	3,5	4	4,5	5	5,5	6	6,5
German sizes	36		37	38		39	40


Foot length in cm (B)	26,0	26,4	26,8	27,2	27,7	28,1	28,5
UK sizes	7	7,5	8	8,5	9	9,5	10
German sizes		41	42		43	44


Foot length in cm (B)	28,9	29,3	29,8	30,2	30,9	31,6	32,3
UK sizes	10,5	11	11,5	12	13	14	15
German sizes	45		46	47	48	49	50

Boot overshoe sizes
Overshoe sizes	S	M	L	XL	XXL
German sizes	38 - 39	40 - 41	42 - 43	44 - 45	46 - 48

Gloves

A. Measure the circumference of your hand at the widest point around your palm to find the correct glove size.

Copy the value into the table

Gloves
Hand circumference in cm (A)	13	14	14,5	15	15,5	16	16,5	17	18
Ordering sizes	2	3	3,5	4	4,5	5	5,5	6	6,5
Kids	XS	XS	S	S	M	M	L
Women					XS	XS	S	S	M
Men


Hand circumference in cm (A)	19	20,5	22	23	24	26	27	29	31
Ordering sizes	7	7,5	8	8,5	9	9,5	10	11	12
Kids
Women	M	L	L	XL	XL
Men	S	S	M	M	L	L	XL	XXL	XXXL

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