Promax Direct Mount Crank Spider - 104 BCD 4-Bolt SRAM 3-Bolt Mount Style For Use w/Promax CK-1 Carbon Cranks Only Black. Specifically designed for the Promax CK-1 carbon cranks this aluminum spider adapter allows the use of a 104 BCD chainring with CK-1 cranks.

High quality aluminum provides high strength at a low weight

Specifically designed for use with Promax CK-1 carbon cranksets

Utilizes SRAMs 3-bolt mount style to attach to crankarm (bolts sold separately. SKU number CK2203 recommended)

NOT compatible with Promax HF-3 cranks

For 4-bolt 104 BCD chainrings