The Pacenti Brevet is a really interesting rim for a lot of reasons. The Brevet is essentially a vintage-inspired road rim but with some modern sentiments. The reason we say this is because while brevet is a classic box section (with eyelets for additional strength,) with an internal width of 19mm, it is also tubeless compatible. This rim really shines with a 32mm - 38mm tubeless tire but people regularly set it up with 650b x 48mm or 700c x 42mm. You're definitely pushing the designed intention of this rim in those contexts but if you need a classic looking rim with tubeless compatibility this is one of the only options available today!

Technical Specs:

Tire Compatibility - Clincher/Tubeless
Brake Compatibility - Rim Brake/Disc Brake
Available Wheel Diameters - 700c, 650b
Weight - 700c / 450g, 650b / 435g 
Construction - Welded
Material - Aluminum
Spoke Drillings - 28, 32, 36
Tubeless Compatible? - Yes
Internal Width - 19mm
External Width - 23mm
Rim Height - 15mm
ERD - 611mm
Max Tension - 125 Kg/F