Question about tires, Bias vs Radial.

Some opinions on this tire choice for -99 ST1100A, front Michelin Road 6 120/70 ZR18 and rear Michelin Road 6 170/60 ZR17 …
 
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Speedo's are all off, I use my gps for accuracy. I believe ABS models came with radials but with a 25 yr old bike it's seen all kinds of tires by know. I had both kinds of tires when I had my 1100 and couldn't tell the difference. Just putting new tires on makes a ride difference.
I currently own three motorcycles that have speedometers with accuracy within 1%. Odometers are up to 3% off but speedometers agree with onboard GPS up to at least 100 mph. I know this thread is ST1100 related so maybe all ST1100 speedometers are off and that is what you meant.
 
AFAIK, unless it is a ST1100 Police model, the USA speedos are off, usually around 3-5 mph optimistic in my experience.
Weird statement...
On all my standard ST1100's (110/80 front tire) the speedo is dead on... (always requiring attention as the one on the car reads 12kph ahead)
On all the ABSII/CBS ST1100's (120/70 front tire) the speedo reads optimistic...
ST1100Y, gear box SPD, P/N 44800ML7003
ST1100AY, gear box SPD, P/N 44800ML7691
 
Weird statement...
On all my standard ST1100's (110/80 front tire) the speedo is dead on... (always requiring attention as the one on the car reads 12kph ahead)
On all the ABSII/CBS ST1100's (120/70 front tire) the speedo reads optimistic...
ST1100Y, gear box SPD, P/N 44800ML7003
ST1100AY, gear box SPD, P/N 44800ML7691
None of mine were dead on - not the Standard or the three ABSII models.
What year is your standard - pre-96 by any chance?
 
What year is your standard - pre-96 by any chance?
Actually all of them: '92 (the first), '00 (the second/current), '96 (the one I sold)... compared to the GPS speed indicator all pretty accurate...
I assumed Honda did try to compensate the altered ABSII tire dimension with a differently geared drive, but didn't get it right...
 
Actually all of them: '92 (the first), '00 (the second/current), '96 (the one I sold)... compared to the GPS speed indicator all pretty accurate...
I assumed Honda did try to compensate the altered ABSII tire dimension with a differently geared drive, but didn't get it right...
It may be a US 'thing' I don't know but all of mine have been optimistic - and still are.
 
My 96 non ABS read high as well, but I don't recall the from tire size. It may have been non stock as I remember having difficulty finding the tires I wanted in the stock sizing, but that could've just been the rear.
 
It may be a US 'thing' I don't know but all of mine have been optimistic - and still are.
Every one of my US-bought motorcycles / speedometers have been likewise overstated.
That includes no less than 5 Hondas, and at least 5 of other manufacturers, while all of my Honda automobiles have agreed with all my GPSs.
Chalk it up to American optimism...?
 
All of my motorcycles prior to the ST1300, and this included a 1999 non-ABS ST1100 and a 2000 ABSII ST1100, were accurate to within 2kmH/1.2MPH based on those mobile radar speed signs that the police set up on the side of the road. I would purposely ride past then at a constant speed to compare it with my speedometer. The variance is based as much on different readings from different radar speed signs as from my speedometers. All of my current four-wheeled vehicles are the same. When I first got my ST1300 I was surprised at how inaccurate it is as I had never had that on any vehicle before it.
 
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