Join Date: May 2006
Location: Duluth (north Atlanta) , GA, USA
Re: GT vs. RT weight specs . . . interesting
It is amazing how many posts on the different BMW web sites try to compare the GT2 to the latest RT. Besides the GT's obvious power advantage, handling is always mentioned as another big difference.
Almost everybody says the RT is more nimble than the GT because it is lighter in weight.
That is partially true, but consdering the fact of how most of the weight is distributed at or below the centerline of the bikes, the effective weight difference ( the amount that you can feel) is probably about half of the total weight difference.
The real difference in the way the two bikes handle is due to their wheelbase lengths and the steering head/drive train geometry.
The GT has the longer wheelbase, and the steering geomety is designed more for stability than quickness. Based on BMW's own published design specifications criteria, the GT was designed for more high speed stability at the expense of some "flickability".
If you look at all of the Jap/European high performance liter bikes, you will notice that they all have gone to shorter frames and more compact engine/ trans designs, which contributes to what they call "mass centralization". They also have incorporated steering geometry that is very quick, but at the same time loses some high speed stability. That's why most of these bikes now include steering dampers as standard.
The GT's engine was designed to keep the mass low in the frame, but at the same time required a longer wheelbase. More or less, exactly the opposite of the way most pure sport bikes are designed these days.
When you consider the new GT's overall capabilities of speed, comfort, 2 up potential, luggage capacity, technology,and relatively light weight, it is one "hell of a motorcycle". Name another bike that even comes close.