From the daVinci website:
Spiders Available
- Four Arm 104mm - 64mm
- Standard 110mm - 74mm
-Road 130mm (with 74mm triple option)
-34 tooth Spider/Chainring. This is a replaceable one piece spider/34 tooth chainring. It is lighter, less expensive (no need to buy chainrings and chainring bolts) and perfectly concentric.