Installed these grip covers a few weeks ago:
Increase rider comfort and reduce road vibration with our Premium Foam Hand Grips for all Can-Am Spyder Models
www.slingmods.com
I just had a chance to ride with them, and I have to say, these are the biggest bang for the buck yet.
I've had trouble with numbness in my hands when using the computer mouse, and other things that require extended grip times.
It was particularly bad when riding the Spyder. The cruise is a Godsend on the highway, but I'd still have to ride one-handed and flex my fingers regularly to get relief.
These grips have made a MAJOR improvement. They're very comfortable and grippy, they reduce any vibration coming through the bars, but I think the biggest improvement is the increased grip diameter.
I rode 2 hours yesterday with only minimal hand discomfort, and a couple 30 minute trips today with no issues at all.
Highly recommended, and SlingMods customer service and shipping was great for all the parts I ordered.
I had an issue with the TricLED sequential turn signals, and they got me a replacement part quickly and without any hassles.