1. Thaum lub log tsheb raug coj mus rau qhov taw qhia hnav, koj yuav tsum tsis txhob tsav tsheb mus ntxiv thiab yuav tsum tau hloov lub log tsheb.
2. Thaum lub log tsheb tawg, lub bulge los yog lub log steel hlau thiab qaum raug, nws yuav tsum tau nres tam sim ntawd.
3. Thaum cov log tsheb tau siv ntev dhau lawm (ntau tshaj peb xyoos), lawv yuav tsum tsis txhob siv.
4. The tires are changed after half a year or every 5000 kilometers.