RoadBikeReview.com's Forum Archives - Components


Archive Home >> Components(1 2 3 4 5 6 7 8 9 10 )


cateye astrale(11 posts)

cateye astralesushiken
Jun 16, 2002 6:58 PM
Does anyone know why this computer stops keeping track of average speed at 80km.? I am in Canada so I keep track in kilometers. I figure it would stand to reason that if kept in miles, it would stop counting at the equivalent, 50 miles. Is this the case or not and do you know why this is so.
a moot question since av. speed >50mph is extremely rarekcd
Jun 17, 2002 2:13 AM
average speed for first 80km, or last?off roadie
Jun 17, 2002 8:30 AM
When you say it "stops keeping track of average speed at 80km", do you mean it simply stops updating the average speed after 80km, or it only tracks avearge speed for the LAST 80km, and not the entire odometer distance? If the later, it dounbds like a good feature- after all, youir average speed for the last 50 miles is a decent (if imprecise) indicator of current training intensity / effectiveness, and saves you the trouble of constantly resetting your odommeter. If the computer averages speed for the an entire distance in the odometer, then you could have 3000 miles on the computer, and hammering for 25 miles wouldn't make a blip in your average speed!
re: cateye astralesushiken
Jun 17, 2002 12:18 PM
Sorry for the confusion, I'll try to make myself more clear. What happens is that when I go for longer rides of over 80km the computer tracks my average speed over that first 80km just fine. Say I am at 28.5km average speed for the ride (not odometer reading, just trip reading) when I hit 80km, well, that is when the astrale stops computing. I could ride the next 10km at 40kmph but the average speed would stay at 28.5km. By the way 80km = 50mi. Does this happen to anyone else with this computer? Just wonderin', thanks!
re: cateye astraleUncle Tim
Jun 17, 2002 7:48 PM
I have a Cateye Astrale that has logged over 7,000 miles and I've never seen it stop computing unless it gets very wet.

How do you know that 80km (about 50 miles) is the point when it stops computing average speed?

You have to remember that the farther you get into a ride the more established the average speed becomes. It could be that from that point on you are riding so near the average speed (a minor deviation) that you simply are not making a big enough difference to change the number.

Looking at your example, where you ride 50 miles with an average of 18 mph, it's not going to be easy to change the overall average in 6.2 miles. You may be seeing 24mph a lot on your display, but you may hit some rollers that knock that down under the 18mph benchmark that you want to change. And keep in mind that stoplights, stop signs, and traffic can have a significant impact on your overall average.

You could have a defective computer, but I doubt it. The real check is to take the final mileage total for the ride and divide it by elapsed ride time. I bet that if you check for a few of your longer rides, you will find this is consistant and accurate.
re: cateye astralesushiken
Jun 17, 2002 9:01 PM
So it seems that I am the only one to have noticed this. I have had this computer for about 7 years and probably 12 or 13k miles. In this time I have ridden over 50 miles only about 15 times or so and have always noticed that over 50 miles the average speed stops computing. I know for a fact that this is not a figment of my imagination as I do as you say, compute the speed by taking total time divided by elapsed time. Most recently I rode 57 miles to an average of 28.7km for the first 50mi. However when i got home and did a computation I calculated the average to 29km even. If I were to use the example above, riding 24mph for 6 miles would in fact make a fairly substantial change to average speed of 18 mph for the first 50. Without actually calculating it I would guess that the average speed would increase by .8 mph roughly. Anyways, I was just curious if this was common to the astrale, it is not a particularly big deal and it seems that I am the only person to have experienced this. Maybe i have a faulty computer.
www.cateye.com N/Mcurlybike
Jun 18, 2002 6:06 AM
never noticedlaffeaux
Jun 18, 2002 8:14 AM
I have an Astrale about that same age (purchased in 1995). I can't say that I've ever paid a lot of attention to the average speed on longer rides. I generally look at it when I'm done, but I don't look at it along the route. I've always assumed that it was accurate. I'll look next time that I go over 50 miles in a ride, and post here.

I do notice that the unit does not like direct sun light. Direct sun light for a few hours (i.e. while I'm at work, and the bike is locked up outside) causes the screen to fade to the point where you can't see it. I try to remember to bring it inside with me to prevent this.
Had it for two years and never noticed this. (nm)Sintesi
Jun 18, 2002 1:00 PM
re: cateye astraledbrogan
Jun 18, 2002 6:38 PM
I think your computer must be faulty. I have numerous rides in my logs that show average speeds changing (both faster and slower) after the 50-mile mark.

-Dan
re: cateye astralesushiken
Jun 18, 2002 8:51 PM
Thanks for all the input. I'll try the cateye website and e-mail them directly.