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Tandem Cycling A bicycle built for two. Want to find out more about this wonderful world of tandems? Check out this forum to talk with other tandem enthusiasts. Captains and stokers welcome!

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Old 09-13-10, 04:44 AM   #26
Machka 
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Originally Posted by Homeyba View Post
That's what I though. Unfortunately, that's too short for me. Even if you do shorter rides, you still would have to remember to charge it each time you get off the bike.
Yes ... anything under 90 hours is completely pointless, and I'd prefer something that lasts a lot longer than that.

The computers I have on my single bicycle last years before I need to replace the battery.
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Old 09-13-10, 04:45 AM   #27
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Cateye Mity 8. The only additional things I'd like are climbing feet and elevation. I can get elevation from a map and climbing feet is only for bragging to your friends.
Is that a wired version? If so, how do you set it up so that both the captain and stoker can have a monitor?
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Old 09-13-10, 01:24 PM   #28
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Originally Posted by Homeyba View Post
What's the battery life on the Garmins? Somewhere I remember it being something like 8hrs? I use the VDO 1.0+ and like it a lot. You can use two confusers with one sending unit.

I use a Garmin Forerunner as an auxiliary computer on my single when I want HR and the battery life is somewhere under 10 hours.

We use a flight deck on the tandem (nice to see what gear your in) with the forerunner for the stoker. Works pretty well. The 705/305 solution seems a little expensive and I would get tired of recharging the battery every night.

Frank and Terry
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Old 09-13-10, 01:52 PM   #29
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Originally Posted by Machka View Post
Yes ... anything under 90 hours is completely pointless, and I'd prefer something that lasts a lot longer than that.

The computers I have on my single bicycle last years before I need to replace the battery.
Depends what you want the bike computer to do. The Edge 705 is not a simple bike computer. It's a GPS system with maps. GPS systems need a bit of power. Either you replace the batteries or recharge them. Unless you ride double centuries every day they do not need to be recharged every day. However, few portable GPS systems can last more than 12 hours of use without recharging.
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Old 09-13-10, 02:58 PM   #30
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Originally Posted by Machka View Post
I have a similar question, except that I'd be interested in a wired computer because wireless doesn't work well around me.

I am a stoker who wants to know: what time it is (I don't wear a watch and don't plan to start for times I ride the tandem), what distance we've covered, and what speed we are going. That's all I need to know ... all the rest of the stuff computers offer is unimportant to me on the tandem, and on my single bicycle.
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Originally Posted by rmac View Post
Depends what you want the bike computer to do. The Edge 705 is not a simple bike computer. It's a GPS system with maps. GPS systems need a bit of power. Either you replace the batteries or recharge them. Unless you ride double centuries every day they do not need to be recharged every day. However, few portable GPS systems can last more than 12 hours of use without recharging.
So, given that Machka is really looking for something plain, vanilla, it would seem to me that the right answer is to get two plain vanilla wired computers. Heck, we're not even talking cadence here.
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Old 09-13-10, 04:08 PM   #31
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So, given that Machka is really looking for something plain, vanilla, it would seem to me that the right answer is to get two plain vanilla wired computers. Heck, we're not even talking cadence here.
Doesn't even have to be electronic. It could just connect to the hub through gears.

I think this thread got hijacked.

Last edited by rmac; 09-13-10 at 04:25 PM.
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Old 09-13-10, 06:12 PM   #32
Ritterview
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Originally Posted by WebsterBikeMan View Post
So, given that Machka is really looking for something plain, vanilla, it would seem to me that the right answer is to get two plain vanilla wired computers. Heck, we're not even talking cadence here.
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I think this thread got hijacked.
Well, Machka wasn't the OP, and the original question allows for a sizable scope of discussion.

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Has anyone figured out a good wireless option for both the Captain and Stoker computers?
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Old 09-14-10, 09:43 AM   #33
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As a stoker, I like to know how fast and how far. Cadence/altitude are of little interest. A $20 Cateye is
enough, and with the Cateye it is easy to splice in an extra cable length and run it down the stem, top tube
and back to the chain stay to a sensor on the rear wheel. This has worked on two tandems and a long WB
recumbent with a cumulative 14yrs experience. Shimano Flite Deck cabling has fine threads mixed with
40+ gauge fine wires and is not easily spliced.
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Old 09-14-10, 11:31 AM   #34
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We are a little over the top but I use an iBike iAero and my stoker uses a Garmin Edge 500. The iBike provides power and cadence information that is then transmitted wirelessly and picked up by the Garmin. We use this set up for time trials where our power output is used as a gauge for our efforts. We also use the power output when we do interval workouts (shooting for a particular power average for a given inteval). Stoker says she likes to have something to focus on other than my posterior.
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Old 09-14-10, 11:34 AM   #35
Ritterview
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Originally Posted by sch View Post
As a stoker, I like to know how fast and how far. Cadence/altitude are of little interest.
The cadence should be of interest to the captain, as he is shifting to keep the cadence just right for the stoker. His computer will have a cadence sensor, and these are usually wireless. Given a wireless cadence/speed sensor on board, the obvious choice for the stoker is to have a computer that picks up the signal, thus obviating the need for additional sensors, magnets, batteries, wires, etc. A stoker computer that reads cadence (without the additional sensor) is no big bump in cost, and so it is no big deal to have it or no.

The altitude is a bump in cost, and its main benefit is the calculation of grade percentage. Not everyone cares about cadence, but when climbing a hill, the steepness of the hill is of universal interest.


Quote:
Originally Posted by ludlaw View Post
We are a little over the top but I use an iBike iAero and my stoker uses a Garmin Edge 500. The iBike provides power and cadence information that is then transmitted wirelessly and picked up by the Garmin.
FWIW, both the Node 1 &2, with its ANT+, would also pick up the iBike's power output.


Last edited by Ritterview; 09-14-10 at 11:41 AM.
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Old 09-14-10, 02:02 PM   #36
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We use a Garmin Edge 500 for the captain and Just a regular Sigma HRM for the stoker.

I like the Edge 500.

The battery easily lasts long enough for double centuries, and you can bring some charged up AA battery and a MintyBoost (google it) for longer rides, or tours with no access to electricity.

I like the altitude. Came in handy when climbing White Mountain this Saturday (to 10,100 feet), to know how much more climbing was left, and how much we have done.

I especially like looking at the ride data afterward.

Like this: http://www.strava.com/rides/182309

My wife doesn't need all the data in her face because she just asks me. However, the HRM is invaluable to her for gauging effort, so she has just a simple HRM

Last edited by uspspro; 09-14-10 at 02:25 PM.
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Old 09-14-10, 03:41 PM   #37
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We have a wireless flight deck in the front for the captain, and a cateye strada double wireless for the stoker. http://www.cateye.com/en/product_detail/552
No interference or other issues. Only challenge during installation was a little fiddling with placement of the cadence magnet on the stoker crank so that it wouldn't deflect the timing chain causing it to touch and 'click' each revolution. I think there was a previous thread discussing that issue. Our wireless solution is not as cheap as using wired computers, but a more reasonable cost than most of the GPS combos mentioned.

We previously used a wired cateye (no cadence) for the stoker with the extra long harness to reach the rear wheel. But with S&S connectors and travel we kept cutting or shorting the fragile wire with all the bending and rough handling. However, for a non-S&S tandem this is a good cost effective solution. http://www.ebikestop.com/cat_eye_str...ord-CY2101.php
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Old 09-15-10, 08:11 PM   #38
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We have a 705 and an old suunto t-1, no interference, helps me keep tab of stokers effort
R&J
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Old 09-16-10, 08:01 PM   #39
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+ 1 for the flight deck for captain and Cateye strada double wireless for the stoker.
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