RK Chains 428 MXZ4 Chain

Size chart

Clothing Size Conversion Chart
Category	US	EU	UK	Chest (in)	Waist (in)	Hips (in)
Men	XS	44	34	32-34	26-28	33-35
	S	46	36	34-36	28-30	35-37
	M	48	38	38-40	32-34	39-41
	L	50	40	42-44	36-38	43-45
	XL	52	42	46-48	40-42	47-49
Women	XS	32	6	31-32	24-25	33-34
	S	34	8	33-34	26-27	35-36
	M	36	10	35-36	28-29	37-38
	L	38-40	12-14	37-39	30-32	39-41
	XL	42	16	40-42	33-35	42-44
Youth	XS	128	7	26-28	23-24	26-28
	S	134	8	28-30	24-25	28-30
	M	140	10	30-32	25-26	30-32
	L	146	12	32-34	26-27	32-34
	XL	152	14	34-36	27-28	34-36

Pants Size Conversion Chart
Category	US	EU	UK	Waist (in)	Hip (in)	Inseam (in)
Men	28	44	28	28	34	30
	30	46	30	30	36	31
	32	48	32	32	38	32
	34	50	34	34	40	33
	36	52	36	36	42	34
Women	0	32	4	24	34	30
	2	34	6	25	35	30
	4	36	8	26	36	31
	6	38	10	27	38	32
	8	40	12	28	40	32

Shoes Size Conversion Chart
Category	US	EU	UK	Foot Length (in)
Men	6	39	5.5	9.25
	7	40	6.5	9.625
	8	41	7.5	10
	9	42	8.5	10.25
	10	43	9.5	10.625
	11	44	10.5	11
	12	45	11.5	11.25
	13	46	12.5	11.625
Women	5	35	2.5	8.5
	6	36	3.5	8.875
	7	37	4.5	9.25
	8	38	5.5	9.625
	9	39	6.5	10
	10	40	7.5	10.25
	11	41	8.5	10.625
	12	42	9.5	11
M (Unisex)	5	37	4.5	8.75
	6	38	5.5	9
	7	39	6.5	9.5
	8	40	7.5	10
	9	41	8.5	10.25
	10	42	9.5	10.625
	11	43	10.5	11
	12	44	11.5	11.25

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RK Chains 428 MXZ4 Chain The RK 428 MXZ4 Chain is tailored for the rigorous world of motocross and supercross competition, offering superior strength and enduring quality for serious competitors. Crafted from high-grade Chromoly steel, it boasts seamless rollers and bushings that ensure consistently smooth operation under the toughest conditions. Chromized pins in the MXZ4 significantly enhance wear resistance, more than doubling the lifespan compared to traditional non-sealed chains. Additionally, these pins are adept at dampening the impact of hard jumps and intense maneuvers. RK utilizes a specialized HIT (Heat Induction Transfer) technique to guarantee each component is heat-treated with precision, reinforcing toughness and extending the chain’s service life. Optimized for 428 pitch applications on smaller displacement racing motorcycles, the MXZ4 excels when performance is critical. Note, this chain is exclusively designed for off-road racing and is not suitable for street usage. Features: 428 pitch racing chain designed for motocross and supercross use Chromoly steel construction for superior strength and durability Seamless rollers and bushings for smooth operation and reduced wear Chromized pins offer more than 2x wear resistance over standard non-sealed chains HIT (Heat Induction Transfer) heat treatment for enhanced toughness High shock-load absorption for extreme riding conditions Tensile strength: 6,400 lbs Maximum engine size: 150cc off-road Maximum horsepower rating: 40 HP Weight: 2.21 lbs Maximum chain width: 20.2 mm Includes clip-type master link Not recommended for street use

Size

120 Links

Finish

Gold