Can bus shield - set bitrate

I’m using this library

https://github.com/sparkfun/SparkFun_CA … master.zip

I opened the Canbus.h file

I can only see 125 kbps, 250 kbps and 500 kbps.

I need 100 kbps. How do i set it?

I found in another forum that I should set

#define CANSPEED_100 9

but I didn’t understand why.