Belt tensioner for 2010 Spyder RT
Very easy to install. Took longer to take panels off bike than to install tensioner. Tensioner seems to be of good quality and does diminish vibration quite a bit.. I would recommend this product.

Read where the belt tensioner would be a wise investment for a smoother ride and less wear and tear on the drive belt..
To be honest, I haven't ridden a long distance yet riding two up to be able to tell a difference or improvement. Unit looked well made though seemed a bit overpriced for a piece of aluminum bar a spring and a roller. Actually took longer just to remove all the body panels necessary for installation then the actual installation of the device itself. Instructions were simple , easy to read and thorough, though I already had the Slingmods tutorial pulled up on my laptop right with me which made it even more of a breeze to install...

Led Lights and Belt Stablelizer
The led lights are a wonderful things to have and they are very bright so cars are aware that you are coming. The make you Spyder very easy to see while on the road. Also I've added the Belt Stabilizer and it really help while traveling at a high rate of speed no the interstate and it keeps you belt from vibrating on your ride. I would purchase both of you have a spyder.

Great add-on for my Spyder.
Easy to install and works great. Kinda sounds like a small turbo whinning down there.

Belt tensioner.
Not installed yet but upon inspection it is very well made and should cure the belt vibration I am experiencing when riding two up which is what I do most. Just a suggestion but including a spare roller would be very useful in case the original fails, it would reduce the down time waiting for a replacement to arrive, especially for me who lives in Canada and has to use a parcel service that is 2.5 hours away.