The calculated distance (air line) between Steinheim an der Murr and Wiesbaden is approximately 90 miles respectively 144 kilometers.
By car or train, the actual journey to Wiesbaden is certainly longer, as only the direct route (as the crow flies) between Steinheim an der Murr and Wiesbaden has been calculated here.
Air line (approximately)
144 kilometers
78 nautical miles