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 (http://www.sigmasport.com/en/produkte/bikecomputer/topline_wired/bc1606l/?punkt=features)
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
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.
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.
Its done in MM or something, on my acewell ,its 1357 . for a 17 inch wheel
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
(http://i167.photobucket.com/albums/u148/James_Jay_Wolf/30062007475.jpg)
Close Up
(http://i167.photobucket.com/albums/u148/James_Jay_Wolf/16072007560.jpg)
Mounted
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 ;)
(http://xtal.als.lbl.gov/sigma1.jpg)
(http://xtal.als.lbl.gov/sigma2.jpg)
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.
(http://pktdo.com/GS500/sigma2.jpg) (http://pktdo.com/GS500/magnets.jpg)
Are any of those back lit?
yep the new model 1606 has a back light
cheers
KaMeL
The Acewell Backlight is Blue!
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 :oops:
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.
(http://pktdo.com/GS500/sig1.jpg)(http://pktdo.com/GS500/sig2.jpg)(http://pktdo.com/GS500/sig3.jpg)
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
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?
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.
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.
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?
I tried it using a wheel size of 1797 and seems much more accurate.
My acewell came with a Set of Wheel guides , the Rim is a 17 inch ,so i looked it up and because its a Magnet epoxyed on to the rim , and the sensor is on the fork leg it says for a 17 inch wheel, input 1357 admitedly its having its mot soon , as its SORN at the moment i havent got to test it for more than 7 mph lol
That's weird. I rolled the bike out and measured the wheel length that way.
With the 1357mm setting I couldn't get the bike past 60mph on the speedo so you might want to roll yours out for your acewell too.
Quote from: Jay_wolf on October 09, 2007, 06:23:05 PM
My acewell came with a Set of Wheel guides , the Rim is a 17 inch ,so i looked it up and because its a Magnet epoxyed on to the rim , and the sensor is on the fork leg it says for a 17 inch wheel, input 1357 [...]
What you're saying finally sunk into my brain.... :oops:
Maybe it will help to visualize what happens as the wheel spins. No matter how far from the axle you mounted the sensor...
* at the hub
* halfway up one of the spokes
* at the edge of the rim
* at the outer diameter of the tire itself
... the sensor would detect the same number of rotations for a given distance of travel. That's because all of those "virtual mounting points" rotate at the same rate - after all, they all go around
together. (Imagine if they didn't! :o)
The important thing for your computer to "know" is the road distance represented by each one of those rotations. If you had no tire on your rim, and the rim were REALLY 17" in diameter, then 1357mm would be the correct setting:
circumference = pi x diameter
= 3.14159265 x (17 inches x 25.4mm/inch)
= 1356.5mm (Rounds up to
1357)
However, there are two problems with these numbers. First, the rim is NOT actually 17 inches in diameter. I just went out with a tape measure and eyeballed it, and it looks more like 17.5 inches. But that's OK - I wouldn't recommend testing your computer with no tire mounted on the rim anyway. :icon_rolleyes:
More importantly, there IS a tire mounted on the rim. The "eyeballed" diameter for my 110/70-17 BT45 front tire is somewhere around 22 inches, giving the following (estimated) results:
circumference = pi x diameter
= 3.14159265 x (22 inches x 25.4mm/inch)
= 1755.5mmtripleb's circumference figure of
1797mm denotes an actual diameter (for his particular front tire) of 22.5 inches. So, he's on the right track. "Roll it out" and measure it! (An actual circumference measurement will be more accurate than a calculation based on an "eyeballed" diameter. :thumb:)
Cor........now I know why we missed Kerry so much.
Questions for those of you with sigma bicycle computers: What kind, and how long do the batteries last in these guys? Do I need to keep pressing a button in order for it to light up or does it automatically light up in the dark?
My speedometer is broken and rather than paying $150 to get it replaced I figured I can get one of these instead.
Mines Designed for a motorbike ,so it runs off the battery , and the Light is on all the time , like a stock gauge , u only see it in low light conditions
Quote from: Jay_wolf on October 16, 2007, 08:58:31 PM
Mines Designed for a motorbike ,so it runs off the battery , and the Light is on all the time , like a stock gauge , u only see it in low light conditions
Very nice! But then again, yours costs the equivalent of $150 vs. the $16 for a bike meter soooo...
It's also a tachometer, right? How responsive is it to sudden changes? Is it jumpy? Did you get one because one of your other gauges were broken?
I'm trying to find a place to buy one in the US unless anyone knows of a viable substitute.
the sigma isn't permanently backlit so if you ride it at night you'd have to keep pressing a button. but for only $30 USD its a pretty good deal. I've only had it for a few weeks, but it works great and I love it.
Quote from: OPTheory on October 16, 2007, 08:46:31 PM
Questions for those of you with sigma bicycle computers: What kind, and how long do the batteries last in these guys? Do I need to keep pressing a button in order for it to light up or does it automatically light up in the dark?
My speedometer is broken and rather than paying $150 to get it replaced I figured I can get one of these instead.
I honestly wouldn't recommend a bike computer as a substitute for a speedometer. It updates pretty infrequently, I think every second or so, and even the backlit models require you to press a button to keep them lit.
If you want a gauge replacement then get a computer designed for a motorcycle, like an Acewell. Or if you have even more money to burn, a Veypor.
No well i did it because i wanted a one off bike , but then came the Kat front end ,so it was even better ,
Its a speedo and tach ,no. the tach is spot on ,runs off the Coil ,
it has a bar on it , and a XXXXX rpm .so 7k would be X7000 and 11k would be 11000
Im putting a Mini Tach on it anyways for when u need to Really Shift at 11.5 or what ever , im sure the acewell would do it , but i like the idea