Careful Chris. When the 98 EV first came on the road, the supplied stock rear tire was a rather narrow affair. Nothing in the aftermarket matched it. Even with the same specification numbers, every other tire was slightly wider. Clearance to the shaft side swingarm tube was critical and most aftermarket tires would rub. The Guzzi solution was to provide a slightly longer axle tube spacer for the rear drive so that the entire wheel would be offset to the left (3mm?) and clear the swingarm. As a result, the rear brake caliper carrier bracket would also move left and bind or interfere with the brake anchor pin threaded through the left side of the swingarm. Thus, the "kit" now also included a similarly shorter brake anchor pin to restore proper clearance on that side.
Time has passed. Parts get moved around on old bikes. Consequently, you might get a variety of answers to your question.