The Expected Way ( Route )  
To Go Kolkata From Mumbai
   On Bicycle ( Cycling Expedition )

The list to go from Mumbai to Kolkata -

Mumbai - Nalsopora East - Surat -

Bharuch - Vadodara - Indore -

Dewas - Ashta - Bhopal -

Nagpur - Rajnadgaon - Durg -

Raipur - Suarmar -  Balangir -

Purankatak - Puri -  Pipili  -

Bhubaneshwar -  Cuttack -  Ratanpur -

Balasore - Nikursini - Kharagpur

And so on to reach Kolkata

The list to go from Mumbai to Kolkata -