I currently have the cateye micro wireless computer and am looking for a cheap alternative that has a rear wheel speed sensor and cadence sensor so that I can monitor my progress while on the trainer. I've looked around and the cateye computer with the speed and cadence sensor is like $100+ and the garmins look awesome, but I don't think I can justify the costs. I bought my cateye micro for $30 so hopefully you guys can suggest something that you guys use and knows works well and isn't priced too high!

Specialized Speedzone Elite...i think i payed like ~40 a year and a half ago

Nashbar has a proprietary unit, very good, with cadence and stopwatch function (great for intervals) for $20-25.

Cateye Strada cadence goes for about 40 - 45$. It's wired though. I dunno how stuck to wireless you are. You can get the specialized speedzone like another guy said but you have to get the elite one, not the sport. The elite is like 50. Then you have to buy a seperate cadence kit for it. If you like Cateye and dont mind wires get the Strada Cadence. If you wanna spend 100+ cateye makes the Double Wireless which has cadence and is wireless.

https://bontrager.com/node

Cateye Strada Cadence
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i have an Cateye Astrale 8 i'd sell or trade if you don't care about wireless.

Cateye Double Wireless. $70 double wireless