Computers - Multiple Bikes?

[MacB]

I have a Sigma BC1106 which is a basic wired computer and allows for 2 bike settings. It alters between bike1 and bike2 by recognising which computer socket it's been inserted into. But I have only the one socket and sensor and now my second bike is ready. I could just get additional to wire up the new bike but I have 2 more bikes on the build.

If I want to have 4 bikes on one computer, so 4 sensors, wires and sockets as well, what's the best option? I don't mind wired or wireless, but am wary of interference via a wireless setup. I have no interest in cadence, heart rate etc, just want basic functions. Currently I record distance, average speed and max speed only.

I'm looking online as well, but hoped someone on here may have already addressed similar issues, tried a search but no joy....cheers....Al

 

[Will1985]

I get the impression you want to know the individual distances/speeds for each bike. Sigma as you know do a 2nd bike kit, but can I suggest recording your rides in a notebook or Excel and then ignore the Bike1/Bike2 function on the computer? Then you can just get another 2 mounting kits.

 

[Mr Pig]

I gave up using a computer about a year ago and you know what? I'm still alive :0)

 

[MacB]

Thanks Will, yep I do record in an excel sheet anyway, but the bikes aren't going to be identical. The tyres will range from 700 x 28 to 35mm, not sure how much difference this makes for readouts. To be fair I'm not fussed about being spot on accuracy wise, I just want to be able to make improvement comparisons. So I don't need to measure tyres exactly I just use computer manual recommendations for entry. Comparing distance to google maps this seems close enough. Speeds only matter to gage my improvements.

How do I work out the variance between tyre sizes, they will all be M+'s? For example if I set the comp for 35mm M+ and then did a 20 mile ride on 28mm M+, what variance would the readout show compared to reality?

 

[Bollo]

Get yourself a Garmin Edge and a decent divorce lawyer!

The garmin will measure speed and distance from the GPS so no need to calibrate. I think it will also store settings for 4 bikes with sensors/magnets for when there's no GPS signal, but its not essential. Also, you get the navigation, which beats the be'jasus out of maps and route sheets.

If you make it to the the IoW on Sunday, I'll let you play with mine (ooer missus etc etc).

 

[Will1985]

Do you want another 1106? I have no need for mine now - the 705 does all the work.

 

[MacB]

I would be interested Will, pm me with how you want to sort it.

Bollo, IoW is a definite no no, Jane is out with her parents and the boys Saturday so doing the Essex ride. Sunday is family duties but I'll be on the night ride to Brighton next week. There are a few of us planning a return to London via coast, then up through Hampshire.

 

[MacB]

Think I've sussed the variance, the standard for 35mm is 2205 and 28 is 2149. This is a 2.54% variance and therefore I will over, or under, record distance by this amount depending on which one I used. Time etc would go unchanged so I can just use the one setting and adjust the total distance, if need be, before entering on my tracker log. My spreadsheet calculates mph etc anyway, it just needs distance and time.

To my way of thinking the easier set up would be a wireless computer with 4 sensors and 4 bar mounts. I will muse further on this, net searches are still bringing poor results.

 

[Bollo]

Bollo, IoW is a definite no no, Jane is out with her parents and the boys Saturday so doing the Essex ride.....

Boo! You'll get nits in Essex! But at least you don't have to battle the trains and boats and the hills - God, the hills...........