Good morning all,
When I had my 16 RTL I noticed that the speedometer was off by about 2mph at highway speed. I've just traded for a 19 RTL (see photo) and it has the same issue. Am I crazy or have you experienced this also? Is there any corrective action? Thanks for your help. Chris
I'm on my 3rd spyder and they have all been 2 mph over actual speed.
17 F3 Limited (Pearl White), Sena 10C intercom, X Grip iPhone mount, IPS key, spyder to go cup holder, Lamonster Highway Center Lane, TricLED engine lights, TricLED night rider, LS2 Helmets, Lamonster Bypass pipe, 2 Brothers Exhaust, mirror relocator kit, Bluetooth radio module, OEM Backrest, Rear LED Light Kit
2011 RTS (Sold to a very nice lady)
1998 Honda Valkyrie
2006 Mustang GT. Varooooom!
US Navy Veteran
SC Law Enforcement Boat Captain
CNC Machine Service Technician
President: Rolling Thunder SC1
Member: Disabled American Veterans, Rock Hill, SC
Member: American Legion
Experience is recognizing the same mistake every time you make it!
I’ve noticed it on radar guns on the interstate as well as my GPS and phone apps
17 F3 Limited (Pearl White), Sena 10C intercom, X Grip iPhone mount, IPS key, spyder to go cup holder, Lamonster Highway Center Lane, TricLED engine lights, TricLED night rider, LS2 Helmets, Lamonster Bypass pipe, 2 Brothers Exhaust, mirror relocator kit, Bluetooth radio module, OEM Backrest, Rear LED Light Kit
I did notice this on my 2018 RTL. I think it is built in for some reason. On my previous bike, a Kawasaki Nomad 1600, it was much worse. On the Spyder, it appeared to me to be 2 MPH off at 70, but unlike many other bikes it wasn't truly a linear error. It was like they put a 2 MPH error in the software.
I installed a slightly larger diameter tire, a 205/60R15 car tire, and it corrected about half the error. I've read the 215/60R15 makes it read perfectly. I'm nit-picky, I would like my speedometer and miles to empty to be accurate, but they will never be.
If you do put larger tires on the back, while correcting the speedometer, it will push the odometer off. In my testing, I checked both the speedometer and odometer, and while the speedometer was originally 2 MPH off at 70, the odometer was pretty close to good.
h0gr1der
2018 RT Limited Blue/Chrome SE6 *Tri-Axis Bars*Adjustable Driver Backrest*175/55R15 Vredestein Front, 205/60R15 Vredestein Rear Tires*Baja Ron Front Spring Pre-Load Adjusters*Misty Mountain Sheepskin seat cover*Centramatic balancers *Garmin Zumo 595LM GPS*KOTT Grills*BajaRon swaybar*SpyderPops Alignment*Missing Belt guard*Magnetic Mirrors*Custom Rear Adjustable Shock*360° LED Headlights & Foglights*Progressive front fender turn signals
States Visited on Less than 4 wheels.
With a General Tire Altimax rear tire in the 215-60 -r15 size ----- the speedo is ONE mph from the GPS. Couldn't ask for any better. Every motorcycle I've ever owned was worse than that.
Lew L
Kaos----- Gone but not forgotten.
2014 RTS in Circuit Yellow, farkle-ing addiction down to once every few months. ECU FLASH IS GREAT.
I rode Yamaha Road Stars for years and they were all at least 5 MPH off. I put the General Altimax on the rear of my 2017 RTS and now the indicated speed is only 1 MPH off
Every motorcycle I ever owned was off. I assumed it was to make one think they were gong fast, therefore reducing the problem of motorcyclist speeding.
~Sandee~
~Sandee~
2016 RT-L (Purchased used in February 2018)
RT Dash Mount (from JT's Spyder Store)
Kuryakin Trident Highway Pegs
Hopnel Pouch
Magic Mirrors
Spyderpops Foam Handgrips
Iron Butt #35273
Girls on Spyders #2779
White 2013 Spyder RT Limited. BajaRon Swaybar, Custom Dynamic Third Brake Light. Ultimate Custom Black and White seat with driver and passenger back rest. Gloryder Led Wheel lights.Custom Dynamics Led Bright sides, Amber and Red Fender lights, and Saddle Bag Bright sides.
2016 F3 Limited Intense Red Pearl. Lidlox, BRP Driver Back Rest, BRP Passenger Back Rest,Fog Lights, GPS, Signature Light! Custom Dynamics LED Bright Sides, Amber and Red Fender lights, and Saddle Bag Bright Sides.
The only one you would need to compare yours with is the one the police are pointing at you.... and by then you will be owing the city some big bucks.... and most of them are off from yours and theirs as well....Considering this is the only adverse effect on you most law enforcement know this and do allow for some leaway....
Gene and Ilana De Laney Mt. Helix, California
2012 RS sm5
2012 RS sm5 , 998cc V-Twin 106hp DIY brake and park brake Classic Black
Almost all motor vehicles are made to have some error in the speedometer. I have not looked it up recently but I believe it is -0 to +10% is allowed. It appears manufacturers aim for +2%. This allows for tire changes and other factors.
Why is it that folks expect the Spyder speedometer to be extremely accurate? Yet their other vehicles are likely the same way and does not seem to be a problem.
I have a 17 RTL. My speedo is off by 2-3 "KM"/hr. Doesn't effect anything. If you have a GPS that shows speed it will give the accurate reading. Running car tires at the same size as the OEM's. I'm not going to worry about it.
Have had five 's now. They have all been 2 mph "slow" compared to standards. I use the "Your speed is X mph" signs as a guide that usually are seen at construction areas.
My Kawasaki MC's have always been about 5 mph less than what was shown on the speedo.
I usually do not try to compensate for the differences. We usually follow the traffic speed if there a lot of cars. If we have the road to ourselves, then I usually go posted plus 5 as a maximum. On nice scenic roads (when we have them to ourselves), sometimes will ride 10 mph LESS just to enjoy the scenery. I have not had a speeding ticket in over 20 years...and we roll through the speed traps all the time.
Currently Owned: 2019 F3 Limited, 2020 F3 Limited: SOLD BOTH LIMITEDS in October of 2023.
I just can’t understand why so many people are so concerned about the speedo error on our Spyders. As a few others have stated, all of our vehicles have a speedo error. Your cars, your trucks, your bicycle....all of them, including your GPS. The GPS depends on how many different satellites it accesses on a given reading, so....how do you know for sure how much it is out? jmho wtfdik
No one will have a perfect speedometer. Police cars have "certified " speedometers. As good as they are, just slight difference in tire pressure will throw them off.
2011 RTS (Sold to a very nice lady)
1998 Honda Valkyrie
2006 Mustang GT. Varooooom!
US Navy Veteran
SC Law Enforcement Boat Captain
CNC Machine Service Technician
President: Rolling Thunder SC1
Member: Disabled American Veterans, Rock Hill, SC
Member: American Legion
Experience is recognizing the same mistake every time you make it!
My 15' RTS is off about 4 mph. My wife's 2018 Toyota Camry XSE is off 3 mph on Cruise, but only off 2 mph when using the gas pedal. It's not because of the radar Cruise control slowing it for a car in front of it.
2021 RTL Marsala Dark Edition 4.13.2021
Lamonster Riser
Spyder Extras Docking station
Zumo XT (my own Plug & Play cable)
WrapMySpyder Carbon fiber partial kit.
Baja Ron ultra performance sway bar and end links
2015 RTS SM6 Intense Red
born on date 3/2015 (mine on 9/12/15)
Sold on 4.13.2021 33k of fun.
Good morning all,
When I had my 16 RTL I noticed that the speedometer was off by about 2mph at highway speed. I've just traded for a 19 RTL (see photo) and it has the same issue. Am I crazy or have you experienced this also? Is there any corrective action? Thanks for your help. Chris
2014 Copper RTS
Tri-Axis bars, CB, BajaRon sway bar & shock adjusters, SpyderPop's Bumpskid, NBV peg brackets, LED headlights and modulator, Wolo trumpet air horns, trailer hitch, custom trailer harness, high mount turn signals, Custom Dynamics brake light, LED turn signal lights on mirrors, LED strip light for a dash light, garage door opener, LED lights in frunk, trunk, and saddlebags, RAM mounts and cradles for tablet (for GPS) and phone (for music), and Smooth Spyder belt tensioner.
Speedometer inaccuracy
Reply With Quote
Originally Posted by spyder01
Speedo error fix
White 2013 Spyder RT Limited. BajaRon Swaybar, Custom Dynamic Third Brake Light. Ultimate Custom Black and White seat with driver and passenger back rest. Gloryder Led Wheel lights.Custom Dynamics Led Bright sides, Amber and Red Fender lights, and Saddle Bag Bright sides.
and most of them are off from yours and theirs as well....Considering this is the only adverse effect on you most law enforcement know this and do allow for some leaway....
's now. They have all been 2 mph "slow" compared to standards. I use the "Your speed is X mph" signs as a guide that usually are seen at construction areas. 
