That is an interesting looking front end on that bike, but I'm not so sure about all the rest built into the tupperware behind that!!

And seriously, unless you
like a crap ride, worse handling, and a bunch of computer problems messing up with your riding and causing things like Limp Home mode &/or VSS errors et al to crop up at random,
then I'd STRONGLY recommend that you DO NOT switch to 16" rims!! :lecturef_smilie:
Because of all the sensors & the VSS Suite/the Nanny, which is really one of the better Traction & Stability suites out there, these Spyders of ours
really don't have a great deal of tolerance for changing the wheels on
just one end to different sized wheels &/or making largeish rolling diameter variations from what the computers expect; so if you increase your
front rim size to 16", then you'd need to run an even lower profile tire than OEM or you'll mess up the rolling diameter relationship between the front and the rear tires; &/or you'd also need to change the rear rim &/or tire size too, only there really isn't all that much scope to change anything much about the rims & tires back there!! :shocked:
Besides, if you
do mess with the front/rear rolling diameter relationship too much, then you
WILL have errors and quite likely bike/ride stopping computer errors cropping up! And even if you do run lower profile tires up front on the bigger rims to avoid messing with the rolling diameter relationship front to rear & the consequent computer errors, then instead you'll screw with the ride and handling, making it a lot harsher than it already is due to the even lower profile tires and less tolerance built into the tire/suspension set-up; loading up the suspension more in areas where it barely copes already; and you'll basically be compromising your Spyder's comfort, handling, and safety all for the sake of those 16" rims!! :banghead:
But it's your Spyder, and if you're into that type of pain, then you certainly can do what you will with it - I'm just pointing out the likely drawbacks!
Just Sayin' :cheers: