Sigma Sport’s BC 1606L Wireless Computer with Cadence is the top model for riders who demand precision from each turn of the crank. This version of the BC 1606L DTS wireless succeeds in this not only by providing a better overview of the essential information during a ride by hiding the total accumulated functions in lieu of specific data points, but through its backlit readout that delivers optimal readability of information even in the dark. In addition, an integrated storage chip prevents the loss of set values during battery change as features such trip section counter, timer, and second wheel size are programmable. The set is equipped with a digital radio sensor with the receiver integrated into the bike computer. But the thing that sets this unit apart is the simultaneous transmission of speed data from the front wheel and cadence data from the turning on the cranks. Comparing these two the handlebar mounted computer is able to output more accurate data that is crucial to the training schedule of serious riders.

Digital Transmission explained.

A peek inside the BC1606L Cadence DTS’ box.

Digital Transmission System (DTS) Explained
With 2-channel radio transmission (km/h and pedal frequency) and 100% digital encoding without data loss, the DTS system guarantees 100% data security of current speed and pedal frequency values during wireless reception. It does this by calculating all relevant data, encoding it and transmitting it in data packets to the integrated receiver in the bike computer. Disturbances such as power lines or mobile phones are no longer a problem as transmission is carried out over the so-called low frequency. A double security system also ensures that only the data packets from your own transmitter are evaluated by the receiver. This means that group rides are no problem.

A further security measure is redundant data transmission so that no data can be lost. The size and quality of the receiver has also been optimized by a specially developed Sigma chip (ASIC) and integrated into the bike computer which also saves on battery life.

General Functions:

• Wireless transmission of 100% digitally coded data segments
• 7 language settings, Dot matrix LCD readout, watertight design
• LCD backlight
• Low battery indicator
• Backup function/through saving chip
• Two wheel sizes adjustable
• Clock and model name in standby

Bike Functions:

• Actual speed
• Average speed
• Comparison of actual and average speed
• Maximum speed
• Trip distance
• Programmable trip section counter
• Total distance bike 1
• Total distance bike 2
• Total distance bikes 1+2
• Actual cadence
• Average cadence

Time Functions:

• Clock
• Stop watch
• Riding time
• Total riding time bike 1
• Total riding time bike 2
• Total riding time bikes 1+2
• Programmable time meter (countdown timer)

What’s in the Box?
BC 1606L DTS bicycle computer with built in sensor, DTS speed transmitter, power magnet, DTS cadence transmitter, cadence magnet, twist-lock handlebar mount, 3-volt CR2032 lithium battery, 42mm O-ring, 32mm O-ring, plastic ties

Manufacturer’s Warranty
Five-year warranty on defective parts or products.

About Sigma Sport
Sigma Sport represents German technology at its highest level, combining innovative design with precision engineering. Sigma tests all their products in their in-house laboratories to withstand the harshest conditions, ensuring quality continually throughout production. All Sigma Sport standard lights conform to the stringent German traffic standard, and all Sigma Sport products are CE-approved.

User Ratings and Reviews

1 Star Great Design, But Performance is Challenging
I bought this based upon bike store recommendation after having 3 Cateye’s fail in the past 3 years. Installation was very easy once I figured it out (the manual is only marginally helpful). I really like the display – very easy to read for those of us over 40. The O’rings do not hold the speed and cadence sensors very secure – they tend to move out of alignment while going over bumps. I trashed the cadence sensor when it slipped into the spokes after going over a bump during a ride. The speed sensor periodically cuts out, then restarts after a minute or 2. Overall, I am dissapointed.

1 Star The bad reviews are true
Well, you get what you pay for.

After reading the reviews and seeing how this is supposed to be mounted I made extra sure to get an industrial strength double sided tape and mounted the unit.

It lasted 3 rides, then I hit a bump and the unit flew of my bike, after it hit my spokes.

Do not purchase this product.

1 Star Invest in something better – this doesn’t last!
I was looking for a wireless computer with cadence, an easy to read display and easy to use while riding. This did pretty well at first. I got “blank outs” on speed and distance every few miles, but they didn’t last more than a minute or so. The computer then “guesses” at the distance missed and your distance suddenly increases. This adds up over time to an inaccurate reading on a long ride. I was slightly irritated with this quality, but lived with it. Now 7 months after I got it, it’s got a mind of it’s own. It works perfectly for a while, and then can’t find the speed or distance (but can do cadence!) So on a 20 mile ride I’ll come home with it reading 4.8 miles. (Yes, I’ve replaced the batteries, no change.) The odometer reads 35,182 (that happened after I passed the 1,000 mile mark). It’s so irritating and frustrating now, that I just use it as a clock and will be looking for a longer lasting replacement. You get what you pay for. Invest wisely.

3 Stars Problems getting started! Save $ and aggro and go with a Cat Eye
I purchased this computer despite the negative reviews and got bit. Installation is relatively simple for anyone who can change a battery, but the instructions are horrific, diagrams only and very unorganized. Installed the cadence transmitter, speed / spoke magnet and computer in a few minutes, but I had difficulty getting the speed sensor to align on my Cinelli’s ovalized fork and the magnet to stay secure on my bladed spokes. It just never appeared to sit well on the fork, so I used double sided foam tape and heavier zip ties than those provided and epoxyed the magnet to the spoke.

I experienced the same “battery” issues (2 DOA) and installed 4 fresh batteries so I wouldn’t have to mess with it later. I also had a real problem with a defective speed sensor, which necessitated a return. The customer service rep was friendly, helpful, recognized that the manual s&%$ed and sent anew sensor and revised(?) manual diagram for the speed sensor install within 2 days. I guess you get what you pay for! Thoma59

5 Stars Just Great
For the price is amazing !!! Work excelent. About the moutain system shoud be better. But in overall work fantastic.

Buy/More Info

SIGMA BC1606L CADENCE DTS Double Wireless Bicycle Speedometer is a post from: Cycling Computers Reviews

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The digitally coded, the BC 2006 MHR DTS combines the classic features of a wireless bike computer with the most important altitude, heart rate and temperature functions. With the easy to operate 4-button navigation, mountain specialists and touring cyclists have fast access to all the important information on their ride. You can read 4 current values (altitude, heart rate, speed and another optional function) in one clear screen. All the functions on the computer can also be used off the bike using the special hiking mode.

Digital Transmission explained.

The top model for heart rate measurement.

Digital Transmission System (DTS) Explained
With 2-channel radio transmission (km/h and pedal frequency) and 100% digital encoding without data loss, the DTS system guarantees 100% data security of current speed and pedal frequency values during wireless reception. It does this by calculating all relevant data, encoding it and transmitting it in data packets to the integrated receiver in the bike computer. Disturbances such as power lines or mobile phones are no longer a problem as transmission is carried out over the so-called low frequency. A double security system also ensures that only the data packets from your own transmitter are evaluated by the receiver. This means that group rides are no problem.

A further security measure is redundant data transmission so that no data can be lost. The size and quality of the receiver has also been optimized by a specially developed Sigma chip (ASIC) and integrated into the bike computer which also saves on battery life.

General Functions:

• 7 language settings, Dot matrix LCD readout, watertight design
• LCD backlight
• Low battery indicator
• Backup function/through saving chip
• Two wheel sizes adjustable
• Clock and model name in standby

Heart rate functions:

• Current heart rate
• Average heart rate
• Maximum heart rate

Bike Functions:

• Current speed
• Average speed
• Comparison of actual and average speed
• Maximum speed
• Trip distance
• Programmable trip section counter
• Total distance bike 1*
• Total distance bike 2*
• Total distance bikes 1+2*

Time Functions:

• Clock
• Stop watch
• Riding time
• Total riding time bike 1*
• Total riding time bike 2*
• Total riding time bikes 1+2*
• Programmable countdown timer forward/back

Altitude Measurement Functions:

• Current altitude
• Total altitude per day uphill/downhill
• Total altitude uphill bike 1*
• Total altitude uphill bike 2*
• Total altitude uphill bike 1+2*
• Current temperature

Walking functions:

• Walking time
• Current altitude
• Total altitude per day uphill/downhill
• Current temperature
• Heart rate functions (like 1706 HR)
• Timer
• Clock

Manufacturer’s Warranty
Five-year warranty on defective parts or products.

About Sigma Sport
Sigma Sport represents German technology at its highest level, combining innovative design with precision engineering. Sigma tests all their products in their in-house laboratories to withstand the harshest conditions, ensuring quality continually throughout production. All Sigma Sport standard lights conform to the stringent German traffic standard, and all Sigma Sport products are CE-approved.

User Ratings and Reviews

1 Star The sigma bicycle computer is a REAL PICE OF JUNK
I used this imitation of bicycle computer for a little more than a month with terrible results it just never work, I really do not have words to describe this nusty mistake I made buying it. I finally replace it with a real computer that cost me about $25.00 dollars a cateye by the way this nusty product (the sigma) cost me $120.00 dollars sorry I do no give it not even a star. it end at trash can.

1 Star JUNK!
The other reviews are pretty much true, one obviously works for Sigma. This ‘Computer’ is junk. Just to add, I’ve used this for 3 months. I wanted it for its heart rate monitor and altimeter readings. The HRM that you strap on has the battery compartment opening against the skin, so when you sweat it stops working and has to be dried out- so half way through my ride I get no heart readout. The altimeter just gives you the current altitude, it doesn’t tell you what your degree of climb is! Why not- it has the information in the ‘computer’ but can’t calculate the degree of the hill I’m on? Don’t waste your money, I won’t get burned by Sigma again.

Now I’m using my Nokia E66 handy with GPS, at least I can upload my ride and review my stats online.

1 Star waste of time and money
terrible instructions and a bad install setup – do you really want to be driving a set screw into your spoke? then i never could get the transmitter and head unit to sync. the main brands are so much easier to get working why bother?

1 Star Sigma wireless speedometer with Heart Rate Monitor
I thought this product was a good fit for my needs – an inexpensive wireless heartrate/speedometer. As it turns out, the directions for setting the unit were very difficult to follow and then the heart rate monitor stopped working within one week. now the battery is running low after about a month. I would have been much better off spending a few extra dollars up front to avoid the frustration and battery costs, not to mention that i now have a unit that doesn’t function as a heartrate monitor. very disappointing. the upside is you get to learn from my mistake rather than making it for yourself.

1 Star locks up and stops registering
If you stop to talk to friends this bike computer will lock up and get in a state that no longer registers speed. The only way to reset it is to take it out of the mount and put it back in, not very safe when you’re trying to ride along. The rubber band mounts did not fill me with confidence and I came back to my garage one day to find the sensor on the ground. good job that didn’t happen on a ride. The provided bands are not big enough to go around mtb suspension forks. Try a VDO MC1.0 Wired Cycle Computer instead it’s much better (but no Heart Rate Monitor).

Buy/More Info

SIGMA BC2006MHR DTS Wireless Bicycle Speedometer With Heart Rate Monitor and Altimeter is a post from: Cycling Computers Reviews

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