Join Date: May 2003
Location: In the Dutch mountains
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djbowen1, the answer to your perhaps depends on your computer's specifics and is difficult to verbalise (no picture available on my pc). But I will have a try anyhow.
I have a wired Ciclosport computer that uses two separate pick-ups for speed and cadence. Both are on the chainstays (left and right). From there, they run under the stays, unite under the bottom bracket (some wire clustering there) and continue under the down tube. At the intersection of the down and the head tube, the wire 'leaves the frame' and is wrapped around a brake cable.
You cannot, I think, avoid tie-strips altogether (I must have used twelve, or so), but perhaps you could find some matching your frame colour. Maybe you could use some tape on the down tube, instead of strips. (Tape however, I guess, gets dirty and therewith spoils the optics.)
Make sure to leave plenty of wire between the tube intersection and the brake cable. You must be able to fully turn the front wheel (even though you will never do that while riding) to either side. Otherwise, the wire might get stressed and break (e.g. when you carry the bike without controlling the handlebar/fork/front wheel). Happened to me...
Good luck and happy RPMs!