2005 · TECHNICAL
2005 Technical Regulations
2005 was a deliberately performance-cutting year. Three major changes: tyre changes during the race were banned (one set of tyres had to complete qualifying + race), engines had to last two race weekends (doubling the 2004 durability requirement), and the rear-wing and front-wing positions were changed to cut downforce. The no-tyre-change rule produced the Indianapolis-2005 Michelin tyre-failure farce (only six cars started the race). Fernando Alonso took his first title with Renault. Last year of V10s; last year of grooved dry tyres.
Chapters
No tyre changes during race
One set of dry tyres had to complete qualifying and the entire race. Pit stops were for refuelling only; the tyres stayed on the car unless damaged. The rule attempted to slow cornering speeds by extending tyre wear. It was scrapped after 2005 because it had produced the Indianapolis debacle (Michelin runners pulled out of the race when tyre failures emerged). Tyres could be changed from 2006 onward.
Key changes
- No tyre changes during the race (one set for quali + race).
- Engines had to last two race weekends.
Last updated: 2026-04-24
This summary is editorial material prepared by F1pedia for general F1 audiences. It is not a legal reference. For binding rule text, consult the official FIA document.