21. Spanish company CAF also expressed interest in the project, citing their experience in building rubber-tyred trains. 22. The result of the findings justify the need for a brand new series of rubber-tyred rolling stock. 23. The Ca . 61a had a conventional, fixed undercarriage with double-tyred mainwheels under the outer engines. 24. Guided buses are sometimes referred to as'trams on tyres', and compared to rubber-tyred metros. 25. Though technologically closer to a simple rubber-tyred metro, it was almost universally referred to as a monorail. 26. In 1950's Hudsons recognised the threat to their business in the construction industry from rubber tyred road vehicles. 27. Trains are wide and long ( composed of permanently coupled two-car sets ), and are rubber-tyred . 28. The is a rubber-tyred metro line in Sapporo, Hokkaido, Japan, operated by Sapporo City Transportation Bureau. 29. Its balloon-tyred mainwheels, under large fairings, were attached by short vertical oleo struts to the wing spars. 30. To enhance mobility, single tyred axles ( with differential locks ) are available, these with a runflat inserts if required.
