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I have 28c Schwalbe Ones on mine and they're the perfect size for me. I'm not sure what they come out at in reality
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Whatever size (between the two) that achieves the least 'balloon' effect will be most aero.
Then you need to weigh in if you want the extra comfort and cornering ability of the larger tyre.
FWIW I have 30c tyres on my 'road' bike that come in at 30mm exactly on 22mm internal wide rim.
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28c. 25c will look comically small.
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28, it's glorious. I have it on my road bike atm and am subject to envy from pals. They do look big but idgaf
Also roll better for a given pressure than 25s
https://www.bicyclerollingresistance.com/specials/conti-gp4000s-ii-23-25-28
PhilDAS
amey
chiroshi
yoshy
@StandardPractice
Tyre width is a well covered and boring debate. As such I'll just ask a question. Should I put 25c (28mm irl) or 28c (31mm irl) Continental GP4000sII tyres on my CAAD12 Disc? I have plenty of frame clearance. Concerned that the 28s will feel and look comically large. I also reckon the 25s will stretch a little and end up closer to 30mm anyway. Thanks guys, I love you all.