For the Answer Alumilite spider:

• It’s a 5-bolt chainring adapter (i.e., the chainring mounts via five bolts) with a 110 mm BCD (bolt circle diameter) specification when paired with the corresponding mini cranks.

• It is designed for use with the Answer Mini cranks (and compatible square-taper crank systems) rather than integrated one-piece crank arms.

• It allows the chainring to be attached securely to the crank arms while maintaining alignment, strength, and minimal flex.

• Construction & Key Specs

  • Made from 7075-T6 aluminium (or CNC machined 7075) in many listings, which is a high-grade alloy favoured for its strength-to-weight ratio. 

  • Size/bolt pattern: 5-bolt, 110 mm BCD according to the listings.

  • It’s sold as a spare/replaceable part (spider only) for the mini crank system: “chainring adapter” style