General Discussion Triathlon Talk » Cycle computer rear wheel sensor Rss Feed  
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2006-01-20 10:04 AM

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Subject: Cycle computer rear wheel sensor
I have bought a trainer and I realized today that I won't know speed, cadence or distance because my computer sensor is on my front wheel (I have a shimano flight deck computer). Do I have to get another computer with a sensor for my rear wheel or can I get another sensor for my existing computer? Thoughts?


2006-01-20 11:18 AM
in reply to: #328130

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Subject: RE: Cycle computer rear wheel sensor
Don't know specifics about the flight deck, but the Cateye Astrale 8 is the perfect trainer computer, with cadence and rear wheel pickup, for ~$30.
2006-01-20 11:30 AM
in reply to: #328130

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Pro
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Subject: RE: Cycle computer rear wheel sensor
As bear stated, I like the Cateye Astrale 8. I actually think when I was in the market for it, he's the person that recommended it on a thread here. But for an existing solution, can't you just move the sensor to the rear tire and run the wire (I'm assuming it's not wireless) along one of the tubes up to the handlebar? If it doesn't reach, just put it wherever like in your pocket or on the table or in the middle of the top tube. I know this is probably inconvenient if it doesn't reach the handlebars, but that's all I can think of. I've never heard of an "extra" wire or sensor or anything like that. If it's wireless, I guess my suggestion would be much easier.

Edited by auto208562 2006-01-20 11:33 AM
2006-01-20 12:04 PM
in reply to: #328130

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Subject: RE: Cycle computer rear wheel sensor
+1 on the Cateye Astrale.  It is the best solution for a trainer bike.  I think I got mine on sale for $28. 
2006-01-20 12:32 PM
in reply to: #328130

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Subject: RE: Cycle computer rear wheel sensor

Thanks for the input guys...how is the Cateye different from other computers? Is it specifically for the rear wheel?

Btw, my flight deck is wireless, but I don't want to mess with moving the sensor because I did not install it and I don't want to f* anything up.

2006-01-20 1:06 PM
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Subject: RE: Cycle computer rear wheel sensor
Astrale 8! It is the goodness!

Except for the instructions, which were written by ferrets.

There's a magnet that goes on the crank and one that goes on the rear wheel, so it's got 2 sensors for measuring cadence & speed.


Edited by tr3crabby 2006-01-20 1:09 PM


2006-01-20 1:47 PM
in reply to: #328353

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Subject: RE: Cycle computer rear wheel sensor
As everyone else said Cateye Astrale 8. I got mine off ebay, brand new shipping and everything was 28 or 29 dollars.

It was easy to set up and very easy to use.
2006-01-20 2:02 PM
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Subject: RE: Cycle computer rear wheel sensor

No one mentioned this yet so I will.  You can not move the wireless sensor of the FlightDeck to the rear because the signal is not strong enough.  Even the wired version of the Flight Deck won't work because the wire isn't long enough, and don't even think about cutting it.

I checked into this a while back and ended up buying the Cateye Astrale 8, which as everyone has mentioned is designed to work on the rear wheel and crank arm.

2006-01-20 2:14 PM
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Subject: RE: Cycle computer rear wheel sensor
I hate to have to spend money on another computer, but it looks like that will be my course of action. Thanks again!
2006-01-20 4:06 PM
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Subject: RE: Cycle computer rear wheel sensor
Don't be afraid of moving the sensor. It's not hard, and as long as the range of the unit large enough it should work fine.
2006-01-20 4:11 PM
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Subject: RE: Cycle computer rear wheel sensor
I just looked at installation instruction and you'll have no problems. Here is link to the instructions page 8, http://bike.shimano.com/media/cycling/techdocs/en/bikecomponents/SC...

How do you like the Flight Deck? I was thinking about getting one.


2006-01-20 7:42 PM
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Subject: RE: Cycle computer rear wheel sensor
Thanks for looking into that for me...I like the Flight Deck a lot so far- it's cool not having to move my hands in order to switch modes on the computer. It's nicely integrated.
2006-01-22 3:30 PM
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Subject: RE: Cycle computer rear wheel sensor
Where did you get your flight deck and how much did it cost? If you don't mind me asking. Thanks
2006-01-22 6:44 PM
in reply to: #329497

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Subject: RE: Cycle computer rear wheel sensor
I got it at my LBS when I bought my bike...The bracket and sensor kit was $85 and the computer was $50, minus 15% off...they installed it for me (free) because I never would have been able to figure it out on my own. I have seen it online as well.
2006-01-22 7:59 PM
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Subject: RE: Cycle computer rear wheel sensor

I said this a few weeks ago, but I think it is worth saying again... In my opinion… and I may be the only person on earth that feels this way! There is no reason to measure speed or distance on the trainer. If I turn my resistance down and use a tall gear I could probably spin 50 MPH on the trainer... Can I do this on the road? Only with a HUGE hill… In club rides I have met several people who brag about their ability to average 20 MPH only to get dropped early on in a REAL ride. A computrainer may be the only exception to this because of its ability to measure everything... Ride the trainer for time and start logging miles in the spring when you get outside. My wireless polar computer doesn’t measure speed or distance but I do measure cadence and HR with it...

You said you couldn’t measure cadence while on the trainer... Why? I'm not too familiar with your particular model of computer but the cadence function should still work. In the winter all you need to do is ride at X cadence for Y time at Z HR or RPE… Look at my January 3 hrs 40 min on the bike and no miles… Does it bum me out maybe a bit, but I don’t worry about it… I guess this is similar to the run for time or distance argument. J

2006-01-22 8:21 PM
in reply to: #329636

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Subject: RE: Cycle computer rear wheel sensor
Good point Pig...I've heard that the numbers on a trainer don't correspond with real road riding, but I guess I just want to see something after riding and going nowhere. I don't know about cadence. I could be wrong, but I don't think the flight deck actually measures cadence- I think it takes into account speed and what gear you're in and prodcues a number it calls cadence. The trainer should be arriving any day now so I will see how I like just riding and not knowing how far I've gone (even if I would be getting a BS number from a computer).


2006-01-22 8:41 PM
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Subject: RE: Cycle computer rear wheel sensor

Nice computer... It dosent have a cadance sensor but it does measure it based on gear and speed... Interesting!

Still... If we both agree it is a BS number I think its best to just let it go, ride the bike and enjoy yourself as best you can indoors. There will be plenty of time to worry about speed and distance in the spring. Right now we want base and that comes from Time In The Saddle. If you really want a number try I did 2 hrs of zone 2 work.

2006-01-22 9:58 PM
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Subject: RE: Cycle computer rear wheel sensor
I'll agree that speed/distance is a bogus number on the trainer, when comparing it to real riding.

BUT, I do put it in my "secret" log. Why? So I can see progress. More time at higher cadence will give me more speed/distance. My computer does not give me ave cadence, so the end ave speed/distance is all I have to go by to show my improvement.

The bigger problem here is that Polly is lacking cadence, since it's determined from speed & gear by the computer. IMHO, cadence IS necessary for trainer rides, especially for beginners like myself.
2006-01-23 11:25 AM
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Subject: RE: Cycle computer rear wheel sensor
My husband just called to tell me that my trainer arrived in the mail! Yes! Good timing, too, cuz I'm getting 6-10" of snow today. I will ride it without anything for now and see how bored I get. I do agree that cadence is important to know, so maybe I will end up with a cateye. Time will tell...
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General Discussion Triathlon Talk » Cycle computer rear wheel sensor Rss Feed