If y'all care, I wrote in and got this response...

Hello nestablifted2,

Thanks for writing in!

We have some category changes in the works for Cycling in March and they do include the addition of Track Bikes as a bike type. We haven't added Track to parts types but will re-examine that at the next opportunity.

The cycling categories will flip in March so that the first choice will be between bicycles and bicycle parts, rather than between bike types. We'll also be adding cycling shoes and apparel under Cycling. We hope the changes will make it easier to buy and sell cycling gear - let us know of any errors or omissions!

Regards,

Alice