So, you catch a 'thief'...

If we're playing semantics here: -

race 1 (rs)*n.***1. ** A local geographic or global human population distinguished as a more or less distinct group by genetically transmitted physical characteristics.
2. A group of people united or classified together on the basis of common history, nationality, or geographic distribution: the German race.
**3. ** A genealogical line; a lineage.
**4. ** Humans considered as a group.
**5. ** Biology **a. ** An interbreeding, usually geographically isolated population of organisms differing from other populations of the same species in the frequency of hereditary traits. A race that has been given formal taxonomic recognition is known as a subspecies.
**b. ** A breed or strain, as of domestic animals.

**6. ** A distinguishing or characteristic quality, such as the flavor of a wine.

I

Cool by me. If we're going to play semantics here, then from your quote above:

1. A group of people united or classified together on the basis of common history
   
   

That means fixed/single-speed cyclists are a race because they have a common history, that of riding fixed wheel or single-speed bicycles...

And that in turn means that you're slating your bro/bruv/cuz.

Lighten up for fuck's sake.