Don't laugh about wood chassis parts. I have two 1910 Brush's, one a Runabout, and the other a Gentleman's Roadster. Both cars have entire frames made from maple. The axles are made of maple as well. I am just replacing the wood frames and the wood axles this year, so they went 113 years with just wood frames. Google them.
A popular saying back in the teens was "Wooden wheels, wooden axles, wooden frame, wooden run!"
But actually they were excellent little cars, and people who have them now think the world of them.
Wood doesn't fatigue, unlike steel or aluminum. The first Bell helicopters had wooden rotor blades. They had no life limit. Aluminum rotor blades had a time limit, after which they had to be changed out.