The Answer Mini Sprocket is CNC machined from 7075 aluminum featuring a unique 4 bolt mounting system that works exclusively on Answer Mini crank arms, eliminating the joint between the spider and chainring to produce an incredibly strong and lightweight drive train combination.FIT: Specifically for Answer or Speedline mini cranksCHAINFIT: 3/32″BOLTREQUIREMENT: Uses 4 bolt pattern for Answer and Speedline mini cranksCRANKREQUIREMENT: Designed specifically to replace the spider on the Answer or Speedline cranks. This option saves weight over using the standard spider, chainring and chainring bolts.Weight: 2.4oz/70.87g (34T)