ahhhh, ok, thats a good question,

I did find out that the 19.99 Db4 Wireless computer from Performance doesn't have a Aero spoke compatable magnet, that was a problem. Then when asked if they sold Aero compatable magnets I was told no, so I finished my order then googled aero spoke magnet, guess who came up first, thats right Performance, then I had to call back and amend my order which turned out to be a good thing becuase they had it on hold becuase they don't sell Size 13 booties even though the web site said 'in-stock", so I was able to cancel the said booties and order the compatable magnet ($1.95).

Did that answer your question?

mmmm, beer for lunch, but I digest.....