Darkside newbie ?

[04kaw1500]

Now that am a darksider I have a ?. What about my speedometer is it right or to fast or to slow I can't tell any difference in it ? The tire is a sp5000 195-60-16

[Yellow Jacket]

What size was the original M/C tire?

[04kaw1500]

Good ? I'll have to look on my old tire . I'm brain dead right now to much O/T A work .

[04kaw1500]

Hey yellow jacket the tire size I took off was 150/80/16

[Cajunrider]

On the 150/80-16 the diameter is 25.45" while on the 195/60-16 the diameter is 24.21". The new tire will revolve 7 more turns per mile than the old tire. Your speedometer error will be roughly 1% off more than it was before.

[macmac]

Mitch, Are you sure the figures are right? Don't seem right to me...

look!
http://i290.photobucket.com/albums/ll275/Mac_Muz/Nomad/tires2_height.jpg

The mc tire is oem brick the other SP 5000 in 195/60 R 16.

I'ld say speedo error is the same...

That pic was taken in Spring 08m and I was too hot and tired to get the screw driver leveled.... At the time i thought it was, and a few moments later the tire was on the bike.

[Cajunrider]

Yep Mac, I used Discount Tire Direct's calculator and come up with the same numbers. Here's the link.

http://www.discounttiredirect.com/direct/brochure/info/tmpInfoTireMath.jsp

[macmac]

Hmmm I wonder if they are correct.... My screw driver is off a bit for sure, but the tire still appears to be taller than the brick. See what I mean?

[Cajunrider]

You sure got your money's worth out of that brick. http://s2.images.proboards.com/grin.gif

[blowndodge]

mac holding my 185/75/16 next to my old 170/70/16 it "looks" about 3 inches taller but "lists" only 2 inches taller.

[Yellow Jacket]

The numbers Mitch provided are correct.

However, the calculator figures "standard" dimensions. Different manufacturers tires may not be exactly the same size as others. Sort of like shoes and clothes.

Below is the disclaimer on the Discount Tire caculator web site:

The results of this calculator are based on the mathematical equations of the sizes entered, not the actual tire specs provided by the tire manufacturers. Please refer to the guides supplied by manufacturers for exact specifications.

[04kaw1500]

Thank guys for all your help I guess 1% not bad .

[macmac]

Ummmm Maybe some differences are because the brick has no wheel in it and the CT does.

There is 0 psi in the Sp 5000 in that shot because i knew it would be a fight to lift it in with 55 pounds of air in it http://s2.images.proboards.com/grin.gif

I don't have 2 rear wheels to make the pic identical either and wasn't wasting time.

And yeah that brick is total trash, but it was the day it was new out of the mold so far as I care. I knew it was because that blasted junker tire was the 2nd one I had to thrash into total junk cuz I am cheap.

The last 2,000 miles on it felt like it was a brick too. I hate these tires with predjuiced...

Anyone wanna buy 2 dead bricks? I still got em.. Too cheap to pay 5 bucks each to throw em in the dump.

(with the democrates as hungery as they are i figure they will take em one day) (make a good wreath painted green on Teddys grave)

[Idaho]

I put the Continental Vanco-8 on like BD did. It corrected the speedo error as verified with a GPS. Speedo is now dead on at 75. Here is the puzzle, prior to the Vanco my odometer read a short mile so I piled up miles faster than I actually traveled. Now my odometer reads long. In a meaured 5 mile course on the interstate I am several tenths of a mile beyond the 5 mile marker before 5 miles rolls over on the odo. So my question is how do I get the odometer and speedometer in sync or is that not possible?

[Yellow Jacket]

The speed sensor sends a single oscillating signal to the speedometer unit. The circuitry inside the unit distributes this signal to both the speedometer and the odometer.

You can vary the signal from the speed sensor by altering the size of the tire or by utilizing an electronic device such as the SpeedoHealer.

Unfortunately the speedometer is approximately 10% fast and the odometer is approximately 3% fast from the factory.

What this means is that you can never get both the speedometer and the odometer to be in sync.

The only way it could be done is to modify the circuitry in the speedometer unit. That would be a very expensive, if not impossible undertaking.

[macmac]

Bob gotta love that huh?

[Yellow Jacket]

Yeah, it would have been nice if Ma Kaw's engineers had produced the same amount of error in both the speedometer and the odometer. http://s2.images.proboards.com/grin.gif

Ah well, it is what it is!

[sharps45100]

Just enjoy the ride!!!!!!!!!!Don't sweat the petty stuff...........................