[Blitzkrieg Motorsports]

Here's some links to some good information:

DOCOL_R8_QUICK_FACTS

Docol R8 vs. 4130

PRACTICAL TEST 4130 AND DOCOL

 

[Blitzkrieg Motorsports]

Same weight - same thicknesses. Different Tensile, yield, and tolerances.

And about 15% more expensive.