ANSWER PINNACLE PRO CRUISER RIM - 24-1.75

The Pinnacle Pro V2 rims are made from 6061-T6 aluminum and feature a sleeved joint. 

There is no excess material in the rim to add any needless weight right down to the spoke face area and braking surface but with the design purpose of also not sacrificing any strength.  At 28.5mm wide, tires of any size 1.5 to 2.125 will have optimal beadseat to offer full benefit of the tire profile without any fear of tire roll-off.  Weighing in at just 325g per rim, the Pinnacle is quite possibly the ultimate BMX racing rim in terms of strength and weight.