D.1.5. mountain-drive and multiple chainrings
Although there may be only few applications for multiple chainrings, they are used for fine tuning a gearing range from time to time.
We recommend to take the Cargo version with the steel spider. For moderate torques and forces, the standard aluminum spider may do the job as well.
First photo: 48 and 38 t. chainrings on a mountain-drive.
Second photo: 40 and 27 t. chainrings