- Made in the USA from 6061-T6 aluminum alloy, Box Two BMX Chainrings are round and true
- They fit 104 BCD four-bolt cranks and are available in black anodized with laser-etched graphics from 38 to 45-teeth
- CHAINRING BOX TWO BMX 104mm 39T 4B BK
Teeth: 39T
Material: 6061AL
Spec: 3/32
Color: Black
Chain: 1sp
Tooth Type: Standard