Originally Posted by Trakhak

You're confused because well-meaning people are giving you way too much information.

All you need to know:

Your bike's wheels take tubular tires.

Those tubular wheels use the size of tubular tire that has been used on 99.9% of tubular wheels over the years.

Some manufacturers label the tubular tires 27", some 28", some 700c. Those three are all the same size.

Since your bike shop let you down, do what many of us do, and buy from the long-running, highly respected Yellow Jersey bike shop online.

Here's their Three Tubular Tires for $85 deal. (Don't forget to order glue, too.)

You even get a choice of tire colors:

2025 : Natural Tan Side or All Black new fresh tubulars