TEMPO - Die-casted aluminum crank arms. - AL7075 stamped and CNC machined outer chainring. - Heat treated chromoly inner chainring. - Chromoly chainring bolts. - Sizes: Length: 170mm, 172.5mm. - Q-Factor: 147mm. - BCD: 110/80mm. - Chainline: 44mm (118mm). - 50/34. - 9 Speed. - Finish: Polished painted black, printed graphics. - Weight: 820 grams.