The new type of suitcase card designed by our engineers is very ingenious and practical. 8. This kind of bicycle can be folded in half and handy to carry around, especially useful during traveling and traffic jams. 9. The maximum speed of this kind of variable speed bicycle is 30 K/H . 10. These machines have few breakdowns and easy to maintain because of their simple mechanical structure. 11.Compared with other brands, this kind of tire costs less per mile and wears much longer due to its topnotch rubber. 12. This kind of tire is characteristic of nonskid stop on wet road.