Luma46 Posted June 5, 2019 Share Posted June 5, 2019 Anyone has installed the Speedo Healer, Speedo Tuner or other gizmo to correct the speed error on Tracer/GT? I understand that it will affect the odometer as well, but how about fuel consumption and use readings? Link to comment Share on other sites More sharing options...
redfjniner Posted June 5, 2019 Share Posted June 5, 2019 I installed Michelin Road 5 tires and because of their profile, it corrected the Speedo error. Don't waste money on a gizmo. Buy a good tire, as in Road 5s. 1 Ken, Candy Ass L.D.R. Sleeps 8 hours (2)2005 FJR1300abs: 230,000 m 2015 FJ-09: 114,000 m (Replaced engine at 106K) Link to comment Share on other sites More sharing options...
Luma46 Posted June 5, 2019 Author Share Posted June 5, 2019 If 5 hours ago, redfjniner said: I installed Michelin Road 5 tires and because of their profile, it corrected the Speedo error. Don't waste money on a gizmo. Buy a good tire, as in Road 5s. If the tire was to correct the speed reading, it would have to have 9% larger circumference than OEM... Link to comment Share on other sites More sharing options...
redfjniner Posted June 6, 2019 Share Posted June 6, 2019 It is larger. If you would like I will measure it. (5,000m wear) Ken, Candy Ass L.D.R. Sleeps 8 hours (2)2005 FJR1300abs: 230,000 m 2015 FJ-09: 114,000 m (Replaced engine at 106K) Link to comment Share on other sites More sharing options...
redfjniner Posted June 6, 2019 Share Posted June 6, 2019 To be honest it is with in .5mph or my GPS. 1/2 the time they match and the other half they are 1 mph off. Going down the road on cruise control they switch back and forth quite often. Before these tires, I ran Dunlops, Bridgestones, PR-2, PR-3, PR-4s and now these Road 5s. All the other would show a 2-3 mph difference in speed. Ken, Candy Ass L.D.R. Sleeps 8 hours (2)2005 FJR1300abs: 230,000 m 2015 FJ-09: 114,000 m (Replaced engine at 106K) Link to comment Share on other sites More sharing options...
Luma46 Posted June 6, 2019 Author Share Posted June 6, 2019 8 hours ago, redfjniner said: To be honest it is with in .5mph or my GPS. 1/2 the time they match and the other half they are 1 mph off. Going down the road on cruise control they switch back and forth quite often. Before these tires, I ran Dunlops, Bridgestones, PR-2, PR-3, PR-4s and now these Road 5s. All the other would show a 2-3 mph difference in speed. That is interesting, I would never expect a same size tire of different brand/make to be that larger. Is your Road 5 tire 120/70-17 in size? Link to comment Share on other sites More sharing options...
Supporting Member betoney Posted June 6, 2019 Supporting Member Share Posted June 6, 2019 21 minutes ago, Luma46 said: That is interesting, I would never expect a same size tire of different brand/make to be that larger. Is your Road 5 tire 120/70-17 in size? Years ago I used to use Michelin tires on my dirt bike and they were slightly narrower when compared side by side to a different manufacturers tire of the exact same advertised dimension. With a Dunlop, Maxxis or Pirelli I could buy a 110 width and with Michelin I could buy a 120 or 130 and it fit the same. ***2015 Candy Red FJ-09*** Link to comment Share on other sites More sharing options...
chitown Posted June 6, 2019 Share Posted June 6, 2019 (edited) Diameter (and many other variables) impact speedo effect. Don't know if the statement above regarding the math is correct but if you took every major brand/model of DOT tire in the same size in new condition and measured them highly doubt you'd find more than 2-3% difference in diameter. Other measurements are a different story. Now somebody can make a field trip to Cycle Gear and science the s*** out of this Edited June 6, 2019 by chitown Clarity. Link to comment Share on other sites More sharing options...
cletus Posted June 6, 2019 Share Posted June 6, 2019 Size difference can be huge. Just look at car tires. That’s why places push to have same brands put on a vehicle Link to comment Share on other sites More sharing options...
redfjniner Posted June 6, 2019 Share Posted June 6, 2019 2 hours ago, Luma46 said: That is interesting, I would never expect a same size tire of different brand/make to be that larger. Is your Road 5 tire 120/70-17 in size? yes Ken, Candy Ass L.D.R. Sleeps 8 hours (2)2005 FJR1300abs: 230,000 m 2015 FJ-09: 114,000 m (Replaced engine at 106K) Link to comment Share on other sites More sharing options...
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