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GoatandTricycle
Claimed weights are always all over the shop.
No one running 28 and 32mm tyres should be caring about tyre weight.
"The GP 5000 TL is available in the 25-622, 28-622, and 32-622 sizes. As usual, we're testing the 25-622 version which has a specified weight of 300 grams. Our sample comes in slightly below the specified weight at 295 grams."
Specified weight of the 25-622 Grand Prix 5000 is now 215 grams while the Grand Prix 4000S II was specified at 225 grams. Surprisingly, my sample of the GP 5000 comes in at 221 grams which is more than my sample of the GP 4000S II that I've tested back in 2014 (which was a very light sample) and came in at just 215 grams.
https://www.bicyclerollingresistance.com/road-bike-reviews/continental-grand-prix-5000-2018