Sigma Sport Sigma BC2209 STS MHR Triple Wireless Computer Review

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(More customer reviews)This just came in, so here are some first impressions.
1. I'm not fond of the sensor magnets, both on the speed sensor and the cadence sensor. The speed sensor on the wheel is a bit too bulky, it didn't slip past the flange on the sensor, I had to place it on a far spoke rather than a near one. The Cadence magnet is a kludgy solution, adhesive and a zip tie, a more refined solution would be preferred.
2. Pretty easy to set up, no complaints there. Rubber bands attachments are good and bad, fine for road bikes, not really useful for mountain bikes- use zip ties instead.
3. The ROX STS sensors work with this unit.
4. The ROX handle bar mount and USB docking station are NOT compatible with the Topline series, they use a different number of pins 4 vs 2.
5. The ROX models can record data from several rides, the BC-2209 can only store 1.
6. The proper USB docking station for the BC-2209 won't be out until the Data Center 2.0 software is ready, in April 2010. (I talked to the customer service people to learn this.) Data Center 2.0 will be Mac OS X compatible! (That made the sale for me!)
7. It's waterproof/resistant, at least the rain I got caught in the other night didn't kill it. I'm guessing you're not going to be biking in a scuba suit, so it's waterproof enough.
8. The buttons are on the top and bottom of the unit, and it tends to move if the handle bar mount is attached with the rubber bands, there is an adhesive to stop this, but I'm not convinced the adhesive will hold over the long term, I like a bolt on solution that can really be cranked down tight.
Ok, that's all for now, even with these annoyances I like the unit a lot, it keeps accurate speeds and doesn't seem to lose connection with the sensors, a huge problem for my old Polar S720i.

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Sigma BC2209 Cycling Computers Item Specifications: Color Black Wirel

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Sigma ROX 9.0 Triple Wireless Computer Review

Average Reviews:

(More customer reviews)I have been using this computer for more than 3 months now and here are my observations.
PROS:
1) Overall a good value for the price paid , I think the combination of wireles monitoring of cadence,speed, HR and logging memory is unique in this price range. However, if you want a GPS capable computer then look elsewhere.
2) I like the customized view display and its layout, which is easy to read even during bumpy rides on unpaved roads.
2)The size of the computer is appropriate for its functionality and it is definitely smaller than corresponding Garmin 305 model.
3) I also like the fact that sensor batteries are standard types and can be changed by myself.
4) Accuracy of the computer is reasonable, I did not find more than 2% difference comparing the distance and elevation profiles registered by ROX with topological maps.
CONS:
1) I really don not understand why cadence is not part of logging memory. According to me, this is one of th top 3 parameters you want to monitor during a ride, together with speed and HR. It is quite ridiculous that Sigma is capable logging the air temperature but not the cadence. Was this designed for cyclists or meteorologists?
2) The sensor attachments are rather clumsy , which has been typical even for older Sigma models. Using o-ring combination with double-sticky foams is a cheap solution in this price range. Need to be frequently adjusted especially if you transport your bike in a car and take the bike wheels off.
3) This computer can be used only when attached to the bike base. Once you use it standalone, no HR can be recorded (elevation is the only variable monitored continuosly ) which makes it not usable for runners.
4) The elevation sensor is OK but since it is based on the air pressure (no GPS data calibration) it makes it very sensitive to the atmospheric pressure variation. I noticed that the elevation of my house registered by the computer varied by more than 20 m (60 ft) in a period of ~2 hours. So calibration before each ride is a must.
5) The uphill/donwhill grade measumeremnts are significantly time lagging and they show right values only if you remain at same slope at least for 15-20 s. It means that if you ride in a terrain with lots of short uphills and downhills, the computer will show +6% climb only after you passed the peak of the climb and are already on the downhill section.
Bottom line: It is a good cyclocomputer that reports all relevant variable that most people will need during rides. I find it usefull for improving my ride in terms of adjusting cadence and gear ratio to achieve optimum HR rate range and ability to log and compare my performance stats during short cycling season here in New England.

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Both on the bike and on the PC, the SIGMA ROX 9.0 answers just about all the questions you could imagine. Besides measuring altitude, inclination and temperature, the newly developed digitally encoded 3-channel wireless STS (SIGMA TRANSMISSION SYSTEM) makes it possible to use several sensors, such as pulse measurement, speed and cadence transmitter, at the same time. Using the docking station and Data Center software included in delivery, trip data can then be clearly displayed in graphic form and evaluated in detail on the PC.

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