The new 850 E-Tec is centered in the Gen4 chassis, where the 800 E-Tec is off-center (left). This allows the overall width of the vehicle to become more narrow.
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Noticeable reduction in effort to roll the sled.
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Simple math –– reduction in width of mass central circle nets big results.
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850 E-Tec Engine is 1.6 inches narrower than 800 E-Tec
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The 850 is positioned 2.2 inches more towared center of chassis.
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Nearly a 50/50 even distribution in side-to-side weight.