They're dual cardan joint shafts. The drive shafts have actually two joint points, which facilitate smoother procedure at greater running perspectives and longer life.
• 37mm Drive Shafts for Double Cardan Joint Shafts x2
• exactly the same size as 37mm universal drive shaft.
• Compatible with XV-02 framework automobiles.
Use with after Hop-Up Alternatives.
Item 42218:Axle Shaft for Double Cardan Joint Shaft (2pcs.)
Item 42219:Joint Casing for Double Cardan Joint Shaft (2pcs.)
Item 42220:1050 Ball Bearing (3mm Thick, 2pcs.)
Item 42221:Cross Joint for Double Cardan Joint Shaft (2pcs.)