Alpinestars Nucleon KR-2i Adult Back Protector Street Body Armor

SKU: 2702-0152-PU

$59.95 $59.96

You save: $0.01 (0%)

One Goal. One Vision

Alpinestars is once again leading the way in developing rider safety. Having pioneered countless innovations in boots, suits and gloves, notably the development of external protection on road race boots in the early 80’s and more recently employing the philosophy on its leather suits, they are now introducing a new dimension into race suit technology – a fully autonomous, multiple field data acquisition system. The Advanced Safety Technology suit (AST).

Fitting telemetry and acquiring data from race bikes and cars has been common practice for some years, however, acquiring data directly from the body of the rider/driver has not and Alpinestars is developing technology to allow technicians the ability to analyze the gravitational and impact forces, as well as the physiological effects experienced by a human when pushing the limits of a high performance race machine.

During the weekend of the German Grand Prix at the Sachsenring, MotoGP rider John Hopkins wore a leather suit equipped with the new A.S.T. system. Although indistinguishable from his usual race suit, John’s body was constantly monitored by a series of accelerometers, impact and physiological sensors.

The impact sensors are mounted on both external and internal surfaces of the suits protectors to measure the loads sustained and absorbed in a fall, without impeding or endangering the rider in any way. The sensors record the maximum impact value subjected to the rider, providing real situation data, above and beyond the test simulations currently conducted in the Alpinestars laboratory.

The custom data processor and solid-state memory, encased in an impact resistant structure and hidden in the back hump on John’s suit, acquire data throughout each session which can be downloaded immediately into a laptop plugged into a connector on the suit. The information can then be studied to analyze pressure point values, lateral G loads experienced, the rider’s pulse and the suit’s cooling performance.

The benefit of developing such technology is the tremendous amount of information that can be gathered about the stresses borne by a rider and the performance of safety equipment during a race and in the event of a fall. Alpinestars’ goal is to develop the technology to measure all the dimensional forces at work upon a rider and to allow greater understanding of material performance thereby improving safety both on the racetrack and ultimately on the road.

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Innovative, premium, adventure touring back protector
Flexible, ergonomic profile incorporates a fusion of energy-absorbing viscoelastic memory foam and articulated vertebrae protection
Features include waist adjustment for customized fit, a snap-on system to fix protector to a suit or jacket and a slim vented kidney belt for added security
Extremely lightweight and breathable for optimized protection and comfort
CE-certified to Level 2 (EN1621-2:2014)

Product Image

Color

Size

SKU

Availability

Price

Black

Small

2702-0152-PU

In Stock

$59.95

Black

Medium

2702-0153-PU

In Stock

$59.95

Black

Large

2702-0154-PU

In Stock

$59.95$59.96

Apparel
Footwear

Alpinestar Men Size Chart

HOW TO MEASURE

A | CHEST

Measure around the fullest part, under the armpits, keeping the tape horizontal.

B | WAIST

Measure around the natural waist line, inline with the navel, keeping the tape horizontal.

C | HIP

Measure around the fullest part of your hips, about 20cm below waist line, keeping the tape horizontal.

D | THIGH

Measure around the thigh just below the crotch, keeping the tape horizontal.

E | INSEAM

Stand against a wall, ask someone else to measure from the crotch to the bottom of your leg.

F | ARM LENGTH

Measure from shoulder (Humerus) to wrist.

G | HEIGHT

Stand against a wall, ask someone else to measure from the oor to the top of your head, keeping the tape vertical.

MEN'S APPAREL SIZE CHART (INCHES)

Euro Size	40	42	44	46	48	50	52	54	56	58	60	62	64
International Size	XXS	XXS \| XS	XS \| S	S	S \| M	M \| L	L	XL	L \| XL	XL \| XXL	XXL	XXL \| 3XL	3XL \| 4XL
U.S. Size	30	32	34	36	38	40	42	44	46	48	50	52	54
U.S. Pant Size	24	26	28	30	32	34	36	38	40	42	44	46	48
A \| Chest (Inches)	30 ^3/4- 32 ^1/4	32 ^1/4- 33 ^7/8	33 ^7/8- 35 ^3/8	35 ^3/8- 37	37 - 38 ^5/8	38 ^5/8- 40 ^1/8	40 ^1/8- 41 ^3/4	41 ^3/4- 43 ^1/4	43 ^1/4- 44 ^7/8	44 ^7/8- 46 ^1/2	46 ^1/2- 48	48 - 49 ^5/8	49 ^5/8- 51 ^1/8
B \| Waist (Inches)	25 ^1/4- 26 ^3/4	26 ^3/4- 28 ^3/8	28 ^3/8- 29 ^7/8	29 ^7/8- 31 ^1/2	31 ^1/2- 33 ^1/8	33 ^1/8- 34 ^5/8	34 ^5/8- 36 ^1/4	36 ^1/4- 37 ^3/4	37 ^3/4- 39 ^1/4	39 ^1/4- 41	41 - 42 ^1/2	42 ^1/2- 44 ^1/8	44 ^1/8- 45 ^5/8
C \| Hip (Inches)	31 ^1/8- 32 ^5/8	32 ^5/8- 34 ^1/4	34 ^1/4- 35 ^7/8	35 ^7/8- 37 ^3/8	37 ^3/8- 39	39 - 40 ^1/2	40 ^1/2- 42 ^1/8	42 ^1/8- 43 ^3/4	43 ^3/4- 45 ^1/4	45 ^1/4- 46 ^7/8	46 ^7/8- 48 ^3/8	48 ^3/8- 50	50 - 51 ^5/8
D \| Thigh (Inches)	19 ^3/8- 19 ^5/8	19 ^5/8- 20 ^1/8	20 ^1/2- 20 ^7/8	21 ^1/4- 21 5/8	22 - 22 ^1/2	22 ^7/8- 23 ^1/4	23 ^5/8- 24	24 ^3/8- 24 ^3/4	25 ^1/4- 25 ^5/8	26 - 26 ^3/8	26 ^3/4- 27 ^1/8	27 ^1/2- 28	28 ^3/8- 28 ^1/2
E \| Inseam (Inches)	28 - 28 ^3/4	28 ^3/4- 29 ^1/8	29 ^1/2- 29 ^7/8	30 ^3/8- 30 ^3/4	31 ^1/8- 31 ^1/2	31 ^7/8 - 32 ^1/4	32 ^5/8 - 33 ^1/8	33 ^1/2 - 33 ^7/8	34 ^1/4 - 34 ^5/8	35 - 35 ^3/8	35 - 35 ^3/8	35 ^7/8 - 36 ^1/4	35 ^7/8 - 36 ^1/4
F \| Outer Arm (Inches)	19 ^1/4 - 20 ^1/8	20 ^1/8 - 20 ^3/4	20 ^7/8 - 21 ^1/4	21 ^5/8 - 22	22 ^1/2 - 22 ^7/8	23 ^1/4 - 23 ^5/8	24 - 24 ^3/8	24 ^3/4 - 25 ^1/4	25 ^5/8 - 26	26 ^3/8 - 26 ^3/4	26 ^3/8 - 26 ^3/4	27 ^1/8 - 27 ^1/2	27 ^1/8 - 27 ^1/2
G \| Height (Inches)	4'11" - 5'1"	5'2" - 5'4"	5'4" - 5'5	5'6" - 5'7"	5'7" - 5'8"	5'9" - 5'10"	5'11" - 6'"	6" - 6'2"	6'2" - 6'3"	6'3" - 6'5"	6'3" - 6'5"	6'5" - 6'6"	6'5" - 6'6"

MEN'S APPAREL SIZE CHART (CM)

Euro Size	40	42	44	46	48	50	52	54	56	58	60	62	64
International Size	XXS	XXS \| XS	XS \| S	S	S \| M	M \| L	L	XL	L \| XL	XL \| XXL	XXL	XXL \| 3XL	3XL \| 4XL
U.S. Size	30	32	34	36	38	40	42	44	46	48	50	52	54
U.S. Pant Size	24	26	28	30	32	34	36	38	40	42	44	46	48
A. Chest (cm)	78 - 82	82 - 86	86 - 90	90 - 94	94 - 98	98 - 102	102 - 106	106 - 110	110 - 114	114 - 118	118 - 122	122 - 126	126 - 130
B. Waist (cm)	64 - 68	68 - 72	72 - 76	76 - 80	80 - 84	84 - 88	88 - 92	92 - 96	96 - 100	100 - 104	104 - 108	108 - 112	112 - 116
C. Hip (cm)	79 - 83	83 - 87	87 -91	91 - 95	95 - 99	99 - 103	103 - 107	107 - 111	111 - 115	115 - 119	119 - 123	123 - 127	127 - 131
D. Thigh (cm)	48 - 49	50 - 51	52 - 53	54 - 55	56 - 57	58 - 59	60 - 61	62 - 63	64 - 65	66 - 67	68 - 69	70 - 71	72 - 73
E. Inseam (cm)	71 - 72	73 - 74	75 - 76	77 - 78	79 - 80	81 - 82	83 - 84	85 -86	87 - 88	89 - 90	89 - 90	91 - 92	91 - 92
F. Outer Arm (cm)	49 - 50	51 - 52	53 - 54	55 - 56	57 - 58	59 - 60	61 - 62	63 - 64	65 - 66	67 - 68	67 - 68	69 - 70	69 - 70
G. Height (cm)	150 - 156	157 - 163	164 - 167	168 - 171	172 - 175	176 - 179	180 - 183	184 - 187	188 - 191	192 - 195	192 - 195	196 - 199	196 - 199

Alpinestar Mens Size Chart

Europe	36	37	38	39	40	41	42	43	44	45	46	47	48	49	50
USA	3.5	4	5	6	6.5	7.5	8	9	9.5	10.5	11.5	12	12.5	13.5	14
Japan	22.5	23	24	25	25.5	26	26.5	27.5	28.5	29.5	30	30.5	31.5	32	33

Apparel
Footwear

Alpinestar Mens Size Chart

A | CHEST

Measure around the chest under the armpits, keeping the tape horizontal.

B | BUST

Measure around the fullest part of the bust, keeping the tape horizontal.

C | WAIST

Measure around the natural waist line, inline with the navel, keeping the tape horizontal.

D | HIP

Measure around the fullest part of your hips, about 20cm below waist line, keeping the tape horizontal.

E | THIGH

Measure around the thigh just below the crotch, keeping the tape horizontal.

F | INSEAM

Stand against a wall, ask someone else to measure from the crotch to the bottom of your leg.

G | ARM LENGTH

Measure from shoulder (Humerus) to wrist.

H | HEIGHT

Stand against a wall, ask someone else to measure from the floor to the top of your head, keeping the tape vertical.

Euro Size	36	38	40	42	44	46	48	50	52	54
International Size	XXS	XXS \| XS	XS \| S	M	L	L \| XL	XL \| XXL	XXL	XXL \| 3XL	3XL
U.S. Size	0	2	4	6	8	10	12	14	16	18
U.S. Pant Size	22	24	26	28	30	32	34	36	38	40
A. Chest (Inches)	29 ^1/8 - 30 ^3/4	30 ^3/4 - 32 ^1/4	32 ^1/4 - 33 ^7/8	33 ^7/8 - 35 ^3/8	35 ^3/8 - 37	37 - 38 ^5/8	38 ^5/8 - 40 ^1/8	40 ^1/8 - 41 ^3/4	41 ^3/4 - 43 ^1/4	43 ^1/4 - 44 ^7/8
B. Bust (Inches)	30 ^3/4 - 32 ^1/4	32 ^1/4 - 33 ^7/8	33 ^7/8 - 35 ^3/8	35 ^3/8 - 37	37 - 38 ^5/8	38 ^5/8 - 40 ^1/8	40 ^1/8 - 41 ^3/4	41 ^3/4 - 43 ^1/4	43 ^1/4 - 44 ^7/8	44 ^7/8 - 46 ^1/2
C. Waist (Inches)	22 ^7/8 - 24 ^3/8	24 ^3/8 - 26	26 - 27 ^1/2	27 ^1/2 - 29 ^1/8	29 ^1/8 - 30 ^3/4	30 ^3/4 - 32 ^1/4	32 ^1/4 - 33 ^7/8	33 ^7/8 - 35 ^3/8	35 ^3/8 - 37	37 - 38 ^5/8
D. Hip (Inches)	32 ^1/4 - 33 ^7/8	33 ^7/8 - 35 ^3/8	35 ^3/8 - 37	37 - 38 ^5/8	38 ^5/8 - 40 ^1/8	40 ^1/8 - 41 ^3/4	41 ^3/4 - 43 ^1/4	43 ^1/4 - 44 ^7/8	44 ^7/8 - 46 ^1/2	46 ^1/2 - 48
E. Thighs (Inches)	19 ^5/8 - 20 ^1/8	20 ^1/2 - 20 ^7/8	21 ^1/4 - 21 ^5/8	22 - 22 ^1/2	22 ^7/8 - 23 ^1/4	23 ^5/8 - 24	24 ^3/8 - 24 ^3/4	25 ^1/4 - 25 ^5/8	26 - 26 ^3/8	26 ^3/4 - 27 ^1/8
F. Inner Legs (Inches)	28 ^3/8 - 28 ^3/4	29 ^1/8 - 29 ^1/2	29 ^7/8 - 30 ^3/8	30 ^3/4 - 31 ^1/8	31 ^1/2 - 31 ^7/8	32 ^1/4 - 32 ^5/8	33 ^1/8 - 33 ^1/2	33 ^1/8 - 33 ^1/2	33 ^7/8 - 34 ^1/4	33 ^7/8 - 34 ^1/4
G. Outer Legs (Inches)	19 ^5/8 - 20 ^1/8	20 ^1/2 - 20 ^7/8	21 ^1/4 - 21 ^5/8	22 - 22 ^1/2	22 ^7/8 - 23 ^1/4	23 ^5/8 - 24	24 ^3/8 - 24 ^3/4	24 ^3/8 - 24 ^3/4	25 ^1/4 - 25 ^5/8	25 ^1/4 - 25 ^5/8
H. Height (Inches)	5'2"- 5'3"	5'4"- 5'5"	5'5"- 5'6"	5'7"- 5'8"	5'8"- 5'9"	5'10"- 5'11"	5'11"- 6'"	5'11"- 6'"	6'1"- 6'2"	6'1"- 6'2"

Alpinestar Womens Size Chart

Europe	36	37	38	39	40	41	42	43	44
USA	5	6	7	8	8.5	9	10	11	11.5
Japan	22.5	23	24	25	25.5	26	26.5	27.5	28

Mens
Womens

Alpinestar Gloves Size Chart

Measurement	Letter Sizing	Numeric Sizing
2 1/8" - 2 5/8"	XS	7
2 5/8" - 3 1/8"	SM	8
3 1/8" - 3 5/8"	MD	9
3 5/8" - 4 1/8"	LG	10
4 1/8" - 4 5/8"	XL	11
4 5/8" - 5 1/8"	XXL	12
5 1/8" - 5 5/8"	XXXL	13

Alpinestar Boots Size Chart

Off-Road Boots

US	5	6	7	8	9	10	11	12	13	14	15	16
EU	38	39	40.5	42	43	44.5	45.5	47	48	49.5	51	52

Road Boots

US	3.5	4	5	6	6.5	7.5	8	9	9.5	10.5	11.5	12	12.5	13.5	14
EU	36	37	38	39	40	41	42	43	44	45	46	47	48	49	50

Alpinestar Jackets Size Chart

Leather Jacket

Size	A\| Chest		B\| Waist		C\| Hip		D\| Height
Size	Inches	Centimeters	Inches	Centimeters	Inches	Centimeters	Inches	Centimeters
46	36 1/4 in	92 cm	29 7/8 in	76 cm	36 1/4 in	92 cm	5' 9"	174 cm
48	37 3/4 in	96 cm	31 1/2 in	80 cm	37 3/4 in	96 cm	5'10"	177 cm
50	39 3/8 in	100 cm	33 1/8 in	84 cm	39 3/8 in	100 cm	5' 11"	180 cm
52	41 in	104 cm	34 5/8 in	88 cm	41 in	104 cm	6'	183 cm
54	42 1/2 in	108 cm	36 1/4 in	92 cm	42 1/2 in	108 cm	6' 1"	186 cm
56	44 1/8 in	112 cm	37 3/4 in	96 cm	44 1/8 in	112 cm	6' 3"	189 cm
58	45 5/8 in	116 cm	39 3/8 in	100 cm	45 5/8 in	116 cm	6' 4"	192 cm
60	47 1/4 in	120 cm	41 in	104 cm	47 1/4 in	120 cm	6' 5"	195 cm
62	48 3/4 in	124 cm	42 1/2 in	108 cm	48 3/4 in	124 cm	6' 6"	198 cm
64	50 1/4 in	128 cm	44 in	112 cm	50 1/4 in	128 cm	6' 6"	198 cm

Alpinestar Leather Suit Size Chart

Leather Suit Jacket

Size		A\| Chest		B\| Waist		C\| Hip		D\| Inseam		E\| Height
US	EU	Inches	Centimeters	Inches	Centimeters	Inches	Centimeters	Inches	Centimeters	Inches	Centimeters
36	46	36 1/4 in	92 cm	29 7/8 in	76 cm	36 1/4 in	92 cm	30 in	76.2 cm	5' 9"	174 cm
38	48	37 3/4 in	96 cm	31 1/2 in	80 cm	37 3/4 in	96 cm	32 in	81.3 cm	5'10"	177 cm
40	50	39 3/8 in	100 cm	33 1/8 in	84 cm	39 3/8 in	100 cm	34 in	86.4 cm	5' 11"	180 cm
42	52	41 in	104 cm	34 5/8 in	88 cm	41 in	104 cm	34 in	86.4 cm	6'	183 cm
44	54	42 1/2 in	108 cm	36 1/4 in	92 cm	42 1/2 in	108 cm	36 in	91.4 cm	6' 1"	186 cm
46	56	44 1/8 in	112 cm	37 3/4 in	96 cm	44 1/8 in	112 cm	36 in	91.4 cm	6' 3"	189 cm
48	58	45 5/8 in	116 cm	39 3/8 in	100 cm	45 5/8 in	116 cm	38 in	96.5 cm	6' 4"	192 cm
50	60	47 1/4 in	120 cm	41 in	104 cm	47 1/4 in	120 cm	38 in	96.5 cm	6' 5"	195 cm
-	62	48 3/4 in	124 cm	42 1/2 in	108 cm	48 3/4 in	124 cm	40 in	101.5 cm	6' 6"	198 cm
-	64	50 1/4 in	128 cm	44 in	112 cm	50 1/4 in	128 cm	40 in	101.5 cm	6' 6"	198 cm

Alpinestar Gloves Size Chart

Measurement	Letter Sizing	Numeric Sizing
2 1/8" - 2 5/8"	XS	7
2 5/8" - 3 1/8"	SM	8
3 1/8" - 3 5/8"	MD	9
3 5/8" - 4 1/8"	LG	10
4 1/8" - 4 5/8"	XL	11
4 5/8" - 5 1/8"	XXL	12
5 1/8" - 5 5/8"	XXXL	13

Alpinestar Womens Off-Road Boots Size Chart

Off-Road Boots

US	6	7	8	9	10
EU	37	38	39	41	42

Road Boots

US	5.5	6	7	8	8.5	9.5	10	11
EU	36	37	38	39	40	41	42	43

Alpinestar Womens Jackets Size Chart

Leather Jackets

Size		A\| Bust		B\| Waist		C\| Hip		D\| Height
US	EU	Inches	Centimeters	Inches	Centimeters	Inches	Centimeters	Inches	Centimeters
0	36	31 1/2 in	80 cm	23 1/2 in	60 cm	33 in	84 cm	5' 3"	160 cm
2	38	33 in	84 cm	25 1/4 in	64 cm	34 3/4 in	88 cm	5' 4"	163 cm
4	40	34 3/4 in	88 cm	26 3/4 in	68 cm	36 1/4 in	92 cm	5' 5"	166 cm
6	42	36 1/4 in	92 cm	28 1/4 in	72 cm	37 3/4 in	96 cm	5' 7"	169 cm
8	44	37 3/4 in	96 cm	30 in	76 cm	39 1/4 in	100 cm	5' 8"	172 cm
10	46	39 1/4 in	100 cm	31 1/2 in	80 cm	41 in	104 cm	5' 9"	175 cm
12	48	41 in	104 cm	33 1/4 in	84 cm	42 1/2 in	108 cm	5' 10"	178 cm
14	50	41 1/2 in	108 cm	34 3/5 in	88 cm	44 in	112 cm	5' 11"	181 cm

Alpinestar Womens Leather SUit Size Chart

Leather Suit

Size		A\| Bust		B\| Waist		C\| Hip		D\| Inseam		E\| Height
US	EU	Inches	Centimeters	Inches	Centimeters	Inches	Centimeters	Inches	Centimeters	Inches	Centimeters
0	36	31 1/2	80 cm	23 1/2	60 cm	33	84 cm	30 1/4	77 cm	5' 3"	160 cm
2	38	33 in	84 cm	25 1/4 in	64 cm	34 3/4 in	88 cm	31 in	79 cm	5' 4"	163 cm
4	40	34 3/4 in	88 cm	26 3/4 in	68 cm	36 1/4 in	92 cm	31 in	79 cm	5' 5"	166 cm
6	42	36 1/4 in	92 cm	28 1/4 in	72 cm	37 3/4 in	96 cm	32 in	81 cm	5' 7"	169 cm
8	44	37 3/4 in	96 cm	30 in	76 cm	39 1/4 in	100 cm	32 in	81 cm	5' 8"	172 cm
10	46	39 1/4 in	100 cm	31 1/2 in	80 cm	41 in	104 cm	32 3/4 in	83 cm	5' 9"	175 cm
12	48	41 in	104 cm	33 1/4 in	84 cm	42 1/2 in	108 cm	33 1/2 in	85 cm	5' 10"	178 cm
14	50	41 1/2 in	108 cm	34 3/5 in	88 cm	44 in	112 cm	34 1/4 in	87 cm	5' 11"	181 cm