Yes, you can bring them if their total dimensions do not exceed 195 cm.
Please note that:
-On urban services: they must be folded, with no protruding parts, and positioned so as not to obstruct boarding or exiting through the bus doors. The vehicle must not be left unattended by its owner. It may be placed in the space reserved for people with disabilities or wheelchairs only if that space is free and not required by eligible passengers. In case of overcrowding, the driver may still refuse to allow its transport.
-On suburban services: loading and unloading can only be done at the terminus under the driver's supervision; if you need to get off along the route, ask the driver if this can be done safely. These items may only be transported in the bus's luggage compartment.