Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.AeroJoe
07-28-08, 01:39 PM
I built one of those DIY cadence meters (http://www.instructables.com/id/Very-Easy-Cadence-Meter-For-Your-Bike-12/). For those who wish to try this, a word of warning. I tried two different types of magnets that can be purchased at your local Xmart in the "craft" departments (one type round, another much thicker and square), and neither one was powerful enough to trigger the sensor. I ended up using a strong magnet from a magnetic latch from H-depot (around $2). You have to carve the magnet out, it's about 1" square with a small hole in the middle. I split it into 4 even pieces with a chisel (magnets are very hard and brittle). I attached the magnets with two-sided heavy-duty mounting tape to a very clean chainwheel, and put the sensor on the seat tube (with a triple, that's the only option). Took it on a 25-miler (1/2 gravel roads) this weekend and it worked great!