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hybridbear

MY2015 Fusion Production Dates & Order Guide

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To add to what Waldo said. The wheel weight does play into it a bit, rolling mass, that few extra pounds of the 18" wheel has to be overcome by the ICE/EV, so it does take a little more energy out of the system, so a 1-2 MPG overall affect could be seen. Mainly though its the tire itself that makes or breaks FE. Michelin doesnt have a tire for the 18" wheel (at least not the last time I looked) in the same design as what they have on the 17" wheel. They do make other LRR in the 18" size, but they are twice the cost of the 17" model.

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This is not correct. You need to read what Larryh has posted about regen efficiency. In some scenarios the regen efficiency is only around 50%.

True, some days regen is aggressive, other times weak. Sometimes the system can't recover the energy fast enough due to limits on the HVB, either having a near full charge, or temperature out of range, so service brakes get applied. One of the things to note about larger wheels, the mass of the wheel is further out from center so more centrifugal(sp?) force.

 

I used to be a mechanic and part of the job was mounting and balancing tires. The larger the wheel/tire the longer it took to spin up and slow down on the balancer. The 30 size mud tires were the worse, they needed manual intervention to get started.

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