What was your best Upgrade/Add-on to your Spyder???

[LongIsland]

As Mikey says "All of them!". These are my best of the best:
2012 RT Ltd: Hi-vis brake/running light onto trunk, floorboards replacing pegs and hard-wiring for heated gear
2014 RT Ltd: Hi-vis brake/running light onto trunk, replacing reflectors on front fenders with Turn/running lights and car tires, ultimate seat, F4 28" windshield and hard-wiring for heated gear
2022 RT Ltd: Rear brake/turn/run light, Zumo 595 GPS, F4 28" windshield, hard-wiring for heated gear, and handlebar riser

 

[Peteoz]

Custom Daylong seat. Without it, my Spyder would have been sold, making it the “best upgrade” by a long, long way
The rest, Pedal Commander, shocks, swaybar, Helibars etc, really are just fine tuning, not essentials.
Pete

 

[zich6]

Backrest and Baja Ron Sway bar.

 

[canamjhb]

2014 RTL... Many upgrades but the three I would do immediately again if starting over are, in order of importance,
1. Replace OEM tires with quality car tires
2. Install Baja Ron sway bar.
3. Laser alignment.

There were many other changes and upgrades done that each added benefits to me. But I consider the 3 listed as musts...

 

[Pandy]

Backrest, car tires, and speedbleeders in that order. Pending is airbox delete kit and front shocks.

 

[askitee]

Year and Model	2017 RTL
Add on / Upgraded item	Nankang Tyres all round better wet weather grip, less aquaplaning, way way better braking, much less vibration, much better handling more feedback from the tyre when it is on the edge of adhesion Wilbers 630/640 Shocks Way way better braking, much better handling much less nervousness on rough surfaces Even the chief cook and bottle washer noticed the difference More adjustability front and rear
Supplier/Vendor or link to item	Wilbers Nankang