Post by Brian Lawrence
I've been trying to decipher the complex world of F1 tyres!
2019 tyres 2018 tyres
Australia C2 C3 C4 Soft Supersoft Ultrasoft
Bahrain C1 C2 C3 Medium Soft Supersoft
China C2 C3 C4 Medium Soft Ultrasoft
Azerbaijan C2 C3 C4 Soft Supersoft Ultrasoft
Spain C1 C2 C3 Medium Soft Supersoft
Monaco C3 C4 C5 Supersoft Ultrasoft Hypersoft
Canada C3 C4 C5 Supersoft Ultrasoft Hypersoft
France C2 C3 C4 Soft Supersoft Ultrasoft
Austria C2 C3 C4 Soft Supersoft Ultrasoft
According to Pirelli, C1 is roughly equivalent to the 2018 Hard tyre,
while C2 is effectively last year's Medium, C3 equiv. to Soft, C4 to
Ultrasoft & C5 to Hypersoft.
Best I can tell these are the tyres Pirelli have brought to Catalunya
2011 Soft/Yellow Hard/Silver
2012 Soft/Yellow Hard/Silver
2013 Medium/White Hard/Orange
2014 Medium/White Hard/Orange
2015 Medium/White Hard/Orange
2016 Soft/Yellow Medium/White Hard/Orange
2017 Soft/Yellow Medium/White Hard/Orange
2018 Supersoft/Red Soft/Yellow Medium/White
2019 C3/Red C2/Yellow C1/White
Although I've put them in columns the actual compounds changed over
the years and were not necessarily similar.
I think I posted this last year after the AbuDhabi test but some folk may find it useful now the season is underway.
The 2019 tyres are simply designated by number.
Comparison 2019 to 2018, **Approximation!!!!**.
This information is directly from Mario Isola.
Note that not only are the compounds *new*, i.e. not the same as 2018!!!
The construction has also changed so the 2019 tyres will behave differently.
C1, Softer than last years Hard, pretty much between Hard/Medium.
C2, Close to last years Medium, but perhaps slightly softer.
C3, Similar to last years Soft.
C4, Between SuperSoft and UltraSoft.
C5, HyperSoft but different construction so less graining.
Note A. New construction so not surprising that characteristics are different to the 2018 tyres.
Note B. At post Abu Dhabi test the Compound 5 was faster than the HyperSoft, the clock showed 0.362 but was apparently probably half that, when adjusted for temps, etc. The expert told me the difference was measured accurately at a bees dick (very close).
Note D. The tread will be thinner in 2019 similar to those thinner treads used in Spain, etc in 2018.
2018 range for those who've forgotten.
And, if you are not aware;
Teams must take at least 1 set of each of the nominated compounds.
Note (1) Teams are free to choose the remaining 10 sets, making 13 sets in total for the weekend.
Note (2) Selections for long-haul events have to be made 14 weeks in advance; for European races the deadline is 8 weeks in advance.
Note (3) The hardest compound will be coloured white, the middle compound yellow and softest red.
(q) Each driver must save one set of the softest of the three nominated compounds for Q3. This set will then be returned for those who qualify in the top 10, but the remaining drivers will keep it for the race.
(r) Each driver must have both race sets available for the grand prix.
2019 Australia, C4q, C3r, C2r. (Note# Approx UltraSoft, Soft, Medium. A definite one stop race, sadly.)
2019 Bahrain, C3q, C2r, C1r.
2019 China, C4q, C3r, C2r. (Note# No step in '19. In 2018 China, UltraSoft, Soft, Medium.)
2019 Azerbaijan, C4q, C3r, C2r.
It seems Pirelli have accepted that the engineers will chase them down to a single stop no matter how soft they make the tyres. So if you can't beat 'em, join 'em, seems these tyres can be pushed (much?) harder than the 2018 tyres. But that won't shut up the frangible, male bovine excrement tyre experts.
I hope this does not lead to:
"Pironi is on the yellow medium tyre which is actually the ultrasoft tyre that was coloured purple last year and Villeneuve is the the harder white hard tyre which was actually the soft tyre last year, it was the yellow tyre followed by Piquet on the red soft tyre which is actually the fastest hypersoft tyres and those were coloured pink last year unless I'm very much mistaken or colour blind."