So, I wanted to get a trip odometer and came across the bc 800 in a post here.  Liked it but figured I would get the latest version, the bc 1606L.

I will install today since out the box it won't fit the bike.  Got some magnets yesterday but that is another post.  Since I was not able to install yesterday I ran some tests.

The main concern I came across about this model were people wondering if the top speed was enough.  The bc 800 is supposed to be accurate up to 180 mph or some number like that and the newer sigma bike computers were only able to go up to 70mph.

Fine with me.  I'm on the city streets mostly and when I do eventually go on the highway I won't be seeing 70mph around here.  Even so, I still wanted to know if it would go faster.

I took a 3 speed fan with metal blades and attached 2 round 1/8" rare earth magnets from radio shack.  I didn't even realize there were 2 at first.  I thought it was one but it was 2 stacked together.  They are pretty small.

I wedged the sensor bar in a cardboard box and put it right next to the magnets so that when the blades spin, the magnets would pass right by the sensor.  I measured the front tire (at night in the rain while walking 2 dogs) and eyeballed it at 26 inches.

How to calculate wheel size (I think)...

1 inch = 25.4 mm

26 X 25.4 =  660.4

660.4 X 3.14 = 2073.656

Round up and you have a wheel size of 2074.

I plan on marking the tire and rolling it when I attach it to the bike but I figured this was good enough for my purposes.

So, we have the bike computer attached to a 3 speed fan and it thinks it's attached to a 26 inch wheel.  The results (about time) are in...





Slow speed was around 74-75 mph.  Medium was about 91mph.  The top speed as you see topped out at 105mph, more than enough for the Savage/S40.  Also, remember, that is not the top speed of the bike computer, just the fastest my fan would go.  I have no idea what the top speed really is but whatever it is, it should be more than enough for anyone here who is considering one.

If I have helped just one person with this info, then it was worth it  

MAybe this picture will give you an idea to make the installation easier.
The wire goes up to the handlebar and the indicator.