Hey all, have been a Specialized Turbo fan for years, the top model that isn’t cotton.
The 28mm tires always measured around 29mm on my rims, one is a Zipp 404 and one a Reynolds DV66, neither one very new so I don’t know rim width.
The new T2T5 28mm tires measure 25.5 and 25.1mm with a micrometer. They are noticeably smaller, so much smaller that I quadruple checked to see that I actually had 28mm tires.
That is all
Weird. Sounds like you have a mis-marked 26 tire. I have a 30 mounted on a 21mm internal width rim - this one measures 31.25mm.
I’m going to call specialized about it. Thanks for the note
Did you figure anything out with this? I just mounted a new Turbo 26mm and it’s measuring ~21.5mm EDIT: 23.5. I understand width will vary depending on rim, but this seems excessive when a year ago they were ~25.5mm. I’ll also ask the shop I bought it from, but curious since I found this thread.
I called specialized and talked to someone who was informed. He said that the new T2T5 tires are definitely narrower than the previous version of the same tire. Across the board narrower. 21.5 on a 26 is crazy though damn
I didn’t know tire widths measured like pants across different brands
Thank you Specialized, very cool
21.5mm tall, or 21.5mm wide?
Sorry, they are actually measuring 23.5mm (wide) x 21mm (tall) at ~100psi. My old ones measured closer to 26mm. I wouldn’t have bought these If I knew they were ~23.5.
what is internal width of your rim? I’ve got Roval Rapide CLX at 21mm internal and nearly all tires measure out to within 1-2mm wider than stated.
It’s a 19mm rim (Mavic Cosmic Carbon 40).
Posting this as an updated in case it helps anyone who runs across this.
Seems like they stretched ~3mm from initial seating so far.They are now 24.7mm wide at ~100psi. It seems like they stretch (widen) over time. I am happy with that, since it’s fairly close to the targeted 26mm.
Yeah I have t2/t5 mondos and turbos both 2bliss and both of them come up wider than nominal.
I guess that explains it. Modern road rims are 23–25 mm wide internally, and I reckon that Specialized has designed these tires to fit modern (i. e. wide) rims.
yes sorry that’s exactly what they said
I think this should have been reported on Escape Collective, when there was that Zipp blowoff earlier in the year. Behind the scenes, I am pretty sure there is an explicit parameter for the reference rim width, and they’re making tires to fit those rim widths.
I’m not sure what the current standard rim width is. I would guess 23mm, definitely not narrower. I have a pair of Campy Bora WTO rim brake wheels with 19mm internal rims. My 28mm Vittoria Corsa Pros measured around 27mm.
Edit: see table 4. Actually, tires with 25-28mm nominal width should be designed for a reference rim width of 19mm internal, according to the current set of standards.
Specialized Roval Rapide CLX wheels are 21mm internal.
Yes. So it’s odd that my 28mm Vittorias should have measured at 27.something mm (day after first mounting) on my 19mm internal width rims, when that’s the design width. It’s also odd that a nominal 28mm tire would not mount at 28mm on a 21mm internal rim.
Never had a tire measure narrower on my Specialized Roval Rapide CLX 21mm internal and Terra gen1 that are 25mm internal. And same with ENVE 5.6 Disc and Bontrager Pro 3V.
I’m a tire junkie and almost exclusively ride outside. Heavy rider on crappy roads so 2000 miles is max lifespan. Sometimes the road debris kills a tire within 500 miles.
Personally I prefer the road feel of Specialized tires over Conti and Pirelli and Vittoria N.EXT. Haven’t tried the nicer Vittoria tires as they are a bit fragile.