0.6 for Tamiya's terms of metric 48 pitch. Size wise it is in between standard 48 and 64 pitch (that will be 52 pitch then...if they ever make one). Not only Tamiya who uses metric system because Kyosho uses them too on their electric cars thus the pinion gears are interchangeable. If you use the aluminum motor mount for the TB01, try GPM's 26 teeth metric 48 pitch. I ran 25/61 on my CF Tb01 and it was begging for one more pitch for the speed.
Tamiya DB01 Durga\Kyosho Lazer ZX-5\Kyosho Turbo Optima
Lex Tyler Paints \ Norcal Hobbies \ Bay Area Peninsula R/C Club