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Customer Review

9 of 9 people found the following review helpful
4.0 out of 5 stars All I had hoped for, 20 July 2009
This review is from: Sigma ROX 9 Computer with Heart Rate and Cadence Counter (Sports)
I made this purchase because I wanted more information about my cycle rides than was being provided by my previous combination of heart rate moniter and basic computer. in addition to basic functions, I was really interested in generating elevation profiles of my rides, and getting information about inclines. I had no previous knowledge or experience of Sigma products - the Rox 9.0 was a recommendation on an online forum. In this review I'll say a bit about the unit and setting it up, the heartrate functions, the user friendliness of the computer, and the software.

First of all, the unit which attaches to the bike is about half the size of a mobile phone. Certainly not cumbersome - I was surprised to read another reviewer complain about the size. The display shows three horizontal lines of information. The top line shows current heartrate, elevation, incline, and cadence. Helpfully, it is possible to zoom in on just one of these. If you are doing an interval and want to keep HR high then you can choose to have this shown in large size with the other values hidden. The second line shows current speed and an indication of whether this is above or below average for the trip. On the third line the user can scroll through a range of information including distance, trip time, average speed, total elevation etc. Setting up the unit was quite straightforward. I was pleasantly surprised that I had no trouble in getting signals from the speed, cadence, or heart rate sensors. The only time I have failed to pick up signals the problem was solved by wiping the back of the unit before reattaching it to the bike. The sensors can be attached by either O-rings or cable ties. I have used the unit on two bikes. On an old steel bike there was plenty of room to position the cadence sensor. However, on my carbon road bike with its chunkier stays it is a very tight fit indeed - the magnet on the crank almost rubs on the sensor.

As for the heartrate functions, the first thing I have to say is that this is the best heartrate monitor I have used. Previous HR monitors have had problems with 1. Picking up a signal, and 2. Giving reliable readings. In particular I have been plagued by HR monitors which gave ridiculously high readings, particularly at the start of rides. Happily, the Sigma unit has been completely reliable and free of erratic readings. One of the most useful features of this computer is the ability to program in three heart rate zones. It is then possible to get information at the end of a ride (or during a ride) telling you how long you spent in each zone. This is great information if you are trying, for example, to spend a certain amount of time at high intensity. I have discovered that my long(ish) distance rides (say 80-120km) with plenty of hills have entailed much less high intensity riding than I had thought would have been the case.

Overall, the unit is easy to read and understand. There is one thing to be aware of though. It seems that the computer must be removed from the bracket (the attachment to the bike) after rides. If not then the clock loses time, and data of the latest trip disappears.

I am not a computer expert by any means. However, I found the software easy to install and use. Seeing rides that I have logged (not all rides are logged - this has to be done manually) as elevation profiles along with whatever other data I choose to display (speed, heartrate, incline, temperate etc.) has been a lot of fun!

All in all I am a satisfied customer. This unit has given me all I wanted in terms of information about my cycling. The only features it doesn't have are GPS and a powermeter. But the former was not important to me, as I normally ride on roads I know. The latter was beyond my budget. Why four stars, not five? Well, I've used the unit for about a month now. It's durability is still untested. If two years from now it is working as it worked today, then my rating would go up to five. Time will tell.
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Review Details



Location: Chiang Mai, Thailand

Top Reviewer Ranking: 58,675