I recently bought a Bontrager Trip 3 computer for my bike (2007 Fuji Roubaix Pro). It has a speed and cadence sensor which are both wired and designed to be mounted at the rear wheel (speed sensor anyway). Is it better to run the wires along the top tube or the downtube in order to get to the rear of the bike?

PS the directions are incredibly vague and actually illustrate the setup for a front wheel sensor (which I am sure this is not).

Thanks in advance for any suggestions.

jWill

Whenever I have installed a wired computer that includes a cadence sensor I always go downtube and install both sensors on the chainstay – because while the speed sensor can be installed on either the chainstay OR the seatstay, the cadence sensor HAS TO be installed on the chainstay.

Maybe you have a choice, but I'm 6'4" and have always had to deal with a very large frame and in every case I found that they don't give you enough wire to make it to the rear chainstay via the top tube.

Same with me. I've always run wires along the downtube because it connects to the chainstays and makes the wiring easier.

Most computers that I see on bikes on the road and every set of directions that I have used say to have the wheel sensor on the front.

Thanks for the replies. Because this has both sensors wired somewhat together there's not enough length to have one at the front and the back.

I'll give it a go tonight, but I just wanted to tap in to the infinite BF expertise first.

I prefer rear mounted sensors - for the Sigma I'm currently using I specifically ordered the optional rear mount set-up so that I can keep track of my total miles to stay on top of certain maintenance tasks even when I'm using the trainer during the winter months.

For the ErgoBrain, the Speed and Cadence Sensors are the same except that the Cadence Sensor has a much longer wire.

Wires? Who uses those anymore? Kidding, I'd go down the downtube, less likely to get ripped off if you grab the top tube to lift the bike.

I'd be surprised if you have enough wire to reach the back wheel via the top tube.