It's important to note that biker gangs can vary in size, influence, and activities, and their numbers can change over time. Some of the well-known biker gangs in Texas include the Bandidos, the Cossacks, the Outlaws, the Pagans, and the Mongols.
The exact size of these biker gangs can be difficult to determine as they operate clandestinely and their membership numbers may fluctuate. It's worth mentioning that not all motorcycle clubs or groups should be automatically assumed to be involved in criminal activities, as many enthusiasts form non-violent clubs centered around a shared passion for motorcycles and riding.
For the most up-to-date and accurate information about the current size and activities of biker gangs in Texas, it would be best to consult law enforcement agencies or recent reports from reliable sources specializing in criminal organizations.