smokinjoe73

Does anyone know the front wheel circumference in MM to calibrate a digital speedo? Also, does anyone have the superhawk logo image on the computer so I can copy the font? Thanks guys.

mikstr

it will depend on the front tire used (and the condition and air pressure). While the recommended tire is a 120/70, there are differences in circumference even within this category.

lazn

Here is how you measure it: http://will.mylanders.com/mc/notes/read.pl?file=293

smokinjoe73

Its a bridgestone BT012 120/70. Where can I find a MM number that is close enough (BTW, of course they vary, but I am looking for someone w/a close #)

smokinjoe73

Thanks, but this guys just talks about spraying paint on the tire & measuring. I was hoping to use my personal computer machine here to get the info w/o rolling around the sidewalk measuring paint spots. Someong must have put a bicycle speedo on a sportbike and knows a number.

zmaniv

Did you look at the website?
BT016 is OD 23.7 X 25.4 = 601.98mm

http://www.motorcycle-karttires.com/...183&LookupID=9

mikstr

"Its a bridgestone BT012 120/70. Where can I find a MM number that is close enough (BTW, of course they vary, but I am looking for someone w/a close #)"

I wasn`t trying to be a smartass. Have a look at the latest issue of Sport Rider magazine. They do some comparisons with a whole slew of different tires and there are some SIGNIFICANT differences between competing brands (within 120/70, 180/55, and 190/55 sizes). If you want to be accurate, you,ll have to get the tape out....

smokinjoe73

No, not the tape!! So I must have missed something on the site, 601.98MM diameter is what circumfrence?
Any word on the superhawk font?

zmaniv

Google is your friend

if you're looking for the circumference:

2 x pi x r or (pi x diameter)
note: r = radius of a circle pi=3.14....

smokinjoe73

Oh yeah, I remembered that just .73 seconds after I put up that last post.

reaper

When I added a mechanical bicycle speedo to my front wheel I made a mark on the wheel and rolled it forward one revolution, got the measurement in inches and converted it to millimeters and input it into the computer. I have a F4i wheel with a Metzler M3 and the above posters are correct that each wheel/tire combo will be slightly different.