Chassis carbon 2.25mm S411 4.0
401639 Chassis carbon 2.0mm S411 4.0
401640 Chassis alu 2.0mm S411 4.0
401641 Chassis carbon 2.25mm S411 4.0
For the Serpent Eryx 4.0 Serpent offers 3 chassis to choose from. Depending which version Eryx 4.0 car you have, you can choose the optional other ones to test.
401639 Chassis carbon 2.0mm S411 4.0
Mainly used on very high traction tracks, Its ultra stiff carbon and has less flex than the 2.25mm version
401640 Chassis alu 2.0mm S411 4.0
401641 Chassis carbon 2.25mm S411 4.0
These 2 chassis are very close handling wise. In general alu is used more indoors on carpet and carbon 2.25 more outdoors on asphalt, but depends on tracks and personal driving feel too. The alu one has equal lowered sides which has even better CG and optimal flex.