Here is my database of various tires I have measured with a digital caliper over the years:
Measured Tire Widths @ 100 psi:
Bora Clincher C17:
Conti GP4000S II (23c) = 25.4 mm
Conti GP4000S II (25c) = 26.7 mm
Vittoria Corsa G+ (23c) = 24.7 mm
Vittoria Corsa G+ (25c) = 26.6 mm
Vredestein Senso (25c) = 25.4 mm
Schwalbe One (25c) = 26.2 mm
Shamal Clincher C15:
Conti GP4000S II (23c) = 24.6 mm
Vittoria Corsa CXIII (25c) = 26.7 mm
Bora Tubular:
Vittoria Corsa CXIII (25c) = 26.0 mm
Vittoria Corsa G+ (25c) = 24.6 mm
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Wide Rims and Tires: Real Measurements
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- Posts: 24
- Joined: Sun Oct 28, 2018 10:30 pm
Mounted GP5000 700x25 clincher tires to LB 56 deep 30 external 23 internal rims. At 80psi they measure 28.19 perfect for the 105% rule even with a little stretching.
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DT Swiss - PRC 1400 SPLINE (18mm inner / 25mm outer width):
-Vittoria Corsa G+ 25mm (85psi): 26.5mm
-Vittoria Corsa G+ 28mm (65psi): 28.0mm
-Vittoria Corsa G+ 25mm (85psi): 26.5mm
-Vittoria Corsa G+ 28mm (65psi): 28.0mm