I mentioned the $56 deal on the Double Wireless to the salesperson at the bicycle area and she said that in the history of the product at REI it was never at $56. She reviewed the history on their computer system when she said this. Not sure what she was looking at since the unit was clearly at $56 last weekend.

In any case, since I missed that deal, I went with the wired unit. I installed it yesterday night and it seems to be working fine. I found it much easier to first hold the sensors and the cadence magnet in place with scotch tape until I figured out the correct positions for them. Then fastened the zip ties and finally removed the scotch tape. The wire was just sufficient for my 2010 Felt Speed 30. I fastened the wire to the down tube as shown in the instructions.

Let's hope it works fine on the road test I am planning this weekend.

BTW, how accurate is the circumference table? The table indicates 2136mm for 700x28c. Do I really need to measure the circumference or is this value close enough? I have Alex rims and Continental Gator Skin tires.

Thanks.