Different tire sizes in real life

[weisan]

Left to right:

Sample A: Vittoria Open Pave CG 27mm (HED C2)

Sample B: Vittoria Rubino Pro 25mm (Pacenti SL23)

Sample C: Continental Grand Prix 4000s 25mm (Pacenti SL23)

[Cicli]

Awesome. Three tires. Cant really tell much of a difference from a photo.

[weisan]

Top to bottom

Sample A

Sample C

Sample B

[saab2000]

Here is a Vittoria 25mm Open CX on a Pacenti SL25 rim. It is virtually identical to the SL23 but without a brake track. Spreads out to 28+mm and I ride these about 70 PSI and they're great.
https://c1.staticflickr.com/1/341/20457100732_d1344b42d6_b.jpg

[oldpotatoe]

Ya better take into account how it spreads' at the bottom when ya ride it.:D

In other words, since you mentioned 'real world', it means notabunch, IMHO. PSI, casing/tread/suppleness, etc, mean a lot more than just size, when they are this close-IMHO-of course.

[fa63]

I think this is more about actual sizes for clearance purposes etc, and not what effects how a tire rides. Afterall, casing/thread count etc. mean nothing if the tire won't fit :D

My experience:

Michelin Pro4 25 on Campy Zonda rims measure 27.2 mm.

Continental GP 4 Season 25 on HPS TB14 rims measure 26.5 mm.

Veloflex Corsa 25 on HPS TB14 measure 24.8 mm. Same tires on Zonda rims measure 23.5 mm.

[Bstone]

The veloflex tires do seem to come in a little narrower. Clements also.

Looks like the Vittorias and Contis run a little wider.

Just got some Conti 4000s's in 28. Wouldn't clear my SRAM Force brakes.

By the way, anybody need any 4000s's in a 28 size? I'll put them in the classifieds. Don't want to jump forums.