new sigma bicycle computer

tripleb · September 30, 2007, 12:51:22 PM

I just bought a new Sigma Sport BC 1606L to compliment the OEM speedo. I got it for only $30 shipped. Anyone have one of these?

http://www.sigmasport.com/en/produkte/bikecomputer/topline_wired/bc1606l/?punkt=features

kml.krk · September 30, 2007, 02:14:08 PM

I don't have any but I'm thinking about getting one of those. Let me know how you installed it and how well it works.
Thanks

510 · September 30, 2007, 09:13:47 PM

I got the cheapest model, the 506, mainly for the time display and a more accurate speedo.

It's attached to the left handlebar, to the right of the headlight/turn signal box. The cable is routed through the speedo cable holders, and the sensor is zip-tied to the left fork near the wheel. The magnet is epoxied to the plastic cover. I can post some pics later if you guys would ilke.

Main gripe is that it doesn't have a backlight, so it's reaaally hard to read at night.

bombadillo · September 30, 2007, 11:08:54 PM

How do you adjust for the wheel size difference between a bike and a bicycle??? I have a wireless shimano unit for my road bike here and never tried to hook it up, but figured I couldn't adjust the difference.

Jay_wolf · October 01, 2007, 07:44:59 AM

Its done in MM or something, on my acewell ,its 1357 . for a 17 inch wheel

kml.krk · October 01, 2007, 10:30:04 AM

Quote from: 510 on September 30, 2007, 09:13:47 PM
I got the cheapest model, the 506, mainly for the time display and a more accurate speedo.

It's attached to the left handlebar, to the right of the headlight/turn signal box. The cable is routed through the speedo cable holders, and the sensor is zip-tied to the left fork near the wheel. The magnet is epoxied to the plastic cover. I can post some pics later if you guys would ilke.

Main gripe is that it doesn't have a backlight, so it's reaaally hard to read at night.

please post some pictures. I'd like to see them
thanks

Jay_wolf · October 01, 2007, 11:41:23 AM

Close Up

Mounted

510 · October 01, 2007, 12:18:41 PM

Sorry for crappy quality - cell phone cam.

Also, please ignore the fact that the gauges are strapped to the top triple using zip ties... it's temporary

tripleb · October 03, 2007, 06:26:24 PM

I got the computer and the rare earth magnets. I'm going to install them tomorrow after work and let you know how it works out. Here's some pics.

Suzuk-E · October 04, 2007, 02:12:20 AM

Are any of those back lit?

kml.krk · October 04, 2007, 10:07:02 AM

yep the new model 1606 has a back light
cheers
KaMeL

Jay_wolf · October 04, 2007, 11:52:59 AM

The Acewell Backlight is Blue!

Absolute Rescue · October 04, 2007, 12:29:27 PM

Quote from: 510 on October 01, 2007, 12:18:41 PM
Sorry for crappy quality - cell phone cam.

Also, please ignore the fact that the gauges are strapped to the top triple using zip ties... it's temporary

HAHA did the same exact thing with my gauges when I put clip ons on...ended up being permenant cause i'm lazy

tripleb · October 04, 2007, 05:43:50 PM

I installed it today although I haven't finished it completely yet. Here's some pics of the semi-finished product. BTW, it seems to work really well so far and does have a really nice backilight. I'm going to use the zip ties to run it along the brake cable and remove the electrical tape once the epoxy cures.

toyopete · October 04, 2007, 05:44:38 PM

Quote from: 510 on September 30, 2007, 09:13:47 PM
I got the cheapest model, the 506, mainly for the time display and a more accurate speedo.

It's attached to the left handlebar, to the right of the headlight/turn signal box. The cable is routed through the speedo cable holders, and the sensor is zip-tied to the left fork near the wheel. The magnet is epoxied to the plastic cover. I can post some pics later if you guys would ilke.

Main gripe is that it doesn't have a backlight, so it's reaaally hard to read at night.

I love it, fails backlight indeed

tripleb · October 07, 2007, 05:16:17 PM

well I tested it out yesterday and I must've done something wrong. The computer was reading 60 mph at 7k rpm in 6th. The bike's speedo was reading about 90 and I think it was most likely closer to the actual speed. Anyone know what is a ballpark speed for that many rpm's in 6th?

510 · October 07, 2007, 10:16:25 PM

Quote from: tripleb on October 07, 2007, 05:16:17 PM
well I tested it out yesterday and I must've done something wrong. The computer was reading 60 mph at 7k rpm in 6th. The bike's speedo was reading about 90 and I think it was most likely closer to the actual speed. Anyone know what is a ballpark speed for that many rpm's in 6th?

Did you remember to input your tire size into the computer? I forgot the number that I put in, but it wasn't that accurate anyway. The best way is to mark a position on your wheel, roll it against the ground for a complete revolution, and use tape measure to measure the distance between the start and end. This is more accurate than just measuring the diameter and multiplying that out.

I think Sigma requires this distance to be converted to millimeters. The manual should have more info about this.

tripleb · October 08, 2007, 03:05:17 PM

I did put the tire size at 1357 for tire 1 but didn't put anything in for wheel 2. I wonder if it's reading wheel 2 for some reason.

tripleb · October 08, 2007, 04:47:11 PM

I measured the diameter of the wheel and it was 70.75 inches which converts to 1797mm. How is this so different than the figure you're using Jay?

tripleb · October 09, 2007, 05:01:14 PM

I tried it using a wheel size of 1797 and seems much more accurate.

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