What Rear Tire Size is needed to correct the speedo?

[tjranch9]

What size tire is needed to correct the speedo???

 

[BajaRon]

A 215/60R15 will get you pretty close. Tire sizes are not universal. They can vary from brand to brand and even from model to model within the same brand. But this size will do the job.

 

[Redbeard]

A 215/60/15 keeps my speedo within 1 mph of my GPS and usually it matches the GPS.

 

[Briorick]

Recently installed a rear Vredestein 205/65R15 and was out riding this afternoon. Comparing my GPS to the dash speedo, at different speed intervals, it was spot on!

 

[jjc54]

A 215/60/15 keeps my speedo within 1 mph of my GPS and usually it matches the GPS.

Another added benefit, though slight, is that according to my odometer I have ridden 1,308 miles and the GPS says I have ridden 1,319 so far this year. That gives me a .33 mpg increase!

 

[BajaRon]

Recently installed a rear Vredestein 205/65R15 and was out riding this afternoon. Comparing my GPS to the dash speedo, at different speed intervals, it was spot on!

The 205/65R15 is slightly taller and about 1/2" narrower than the 215/60R15

 

[Briorick]

The 205/65R15 is slightly taller and about 1/2" narrower than the 215/60R15

Yeah, I noticed the substantial size difference ( of course expected ) from the Kumho 225/50R15 that I replaced. My GPS and Speedo were never in sync. Off by 2 mph.
My first choice was for 215/65R15, but was a hard one to find. So settled on the 205/65R15. We are rollin'! LOL

 

[BajaRon]

My first choice was for 215/65R15, but was a hard one to find. So settled on the 205/65R15. We are rollin'! LOL

They're right here.

https://www.tirerack.com/tires/TireSearchResults.jsp?zip-code=37743&width=215/&ratio=65&diameter=15&rearWidth=255/&rearRatio=40&rearDiameter=17&performance=ALL

 

[rjinaz86323]

As stated above different tires measure slightly different. I installed a General Altimax RT43 SL 225/60R-15 and my speedo is spot on with my GPS

 

[CrazyCooter]

The 225/50R15 Kumho put our odometer right on and speedo 2mph high when compared with the GPS.

 

[Briorick]

They're right here.

https://www.tirerack.com/tires/TireSearchResults.jsp?zip-code=37743&width=215/&ratio=65&diameter=15&rearWidth=255/&rearRatio=40&rearDiameter=17&performance=ALL

Yes, I seen those.
MY BAD! I should have stated clearer I was looking for the Vredestein for the rear, like the 2 fronts I purchased earlier.

 

[BajaRon]

Yes, I seen those.
MY BAD! I should have stated clearer I was looking for the Vredestein for the rear, like the 2 fronts I purchased earlier.

Understood, Vredestein does not make a tire in that size.

 

[DickB]

Not sure about other years, but I was able to adjust my speedometer with BUDS Megatech on my 2014 RSS. It was off 2-3 mph with stock tires.

off 2-3 mph with stock tires.

 

[BajaRon]

As stated above different tires measure slightly different. I installed a General Altimax RT43 SL 225/60R-15 and my speedo is spot on with my GPS

Interesting. We installed this same tire on an F3 Spyder and it rubbed the swingarm. Had to remove it and install a 215/60R15.

 

[Snoking1127]

I run Vredestein on the front and a General out back on both of my 2018's.

 

[rjinaz86323]

Interesting. We installed this same tire on an F3 Spyder and it rubbed the swingarm. Had to remove it and install a 215/60R15.

Mines been on for almost 2 years now. No rubbing at all.

 

[Peter Aawen]

For those who may not yet have noticed from the variety of answers and posts on this subject, every Spyder can be juuust a little bit different in their construction, the room under their fenders/in their wheel arches for different sized tires, and in their individual speedo/odo error; plus, there's differences in the actual size of tires vs the nominal size printed on their sidewall, not just between different brands of tires, but also between similar sizes and types of tires from the same manufacturer; and then there's also the differences in sizes that the tire pressure a given tire may be running at vs any other tire/its tire pressure, &/or the ambient temps/variations in both the tire pressures and sizes that can bring...


Each of these individual differences may seem to be quite small, but when you add them all up for a given Spyder/set of circumstances and realise that the total difference between YOUR Spyder &/or the tire size it's running may be somewhat different IN TOTAL to that of any other Spyder, it should become clear that there is REALLY NO ONE DEFINITIVE ANSWER to the OP's original question - "What size tire is needed to correct the speedo???" any of the answers given above might come close, but if any of the possible differences mentioned are small enough OR large enough, they juuust might not apply in the OP's particular/specific set of circumstances, so as always... CAVEAT EMPTOR!!

Just Sayin'

 

[BajaRon]

Mines been on for almost 2 years now. No rubbing at all.

I'm wondering if the RT has more room than the F3. Something to look into.

 

[ColemanJ]

I posted this chart of tires for the Spyder a couple of years back. I haven't updated it but I'm sure most of the data is still valid. The file is in a PDF document. Hopefully this can help someone considering new tires. The ones I used were the Hankook I highlighted in light blue. Enjoy!!!

View attachment 207832

 

[rjinaz86323]

I'm wondering if the RT has more room than the F3. Something to look into.

Ron, mines an 2018 F3L