Originally Posted by sam fisher
Are you saying that with the correct hub bore there will be less strain on bearings? Iv been wanting spacers mainly for the look , do they offer improved handling? Also , would 25 mm be noticable visually? What are they actually intended for?
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25mm is almost one inch so yes that should result in some visual changes. Do they improve handling? That's questionable, they increase track width which can be helpful but they can also change the suspension geometry (steering may become heavier etc.). Moving things outward does change the loading on the bearings and it doesn't take much of a change in distance to do so. Car engineers try to evenly disperse the weight of each corner of the car across the bearing (as vertical of a load as possible on the bearing). Moving that wheel outward without moving the position of the bearing changes how the load will now be distributed across the bearing. This can cause the bearing to heat up which can lead to premature wear or eventual self destruction.