I run 28 on mine, not sure if you could fit 30

Thanks!

---

http://powerful-problem-solving.com

Might depend on what Px you mean, but my P2C will not take 28s and will only take 25s on the front. I tried a 25 on the rear and it rubbed the frame. This was prior to learning about the adjustment screws, so I may try it again after winter to see if they do actually work and I was just ignorant.

---

Not a coach. Not a FOP Tri/swimmer/biker/runner. Barely a MOP AGer.
But I'm learning and making progress.

he asks about P3X/PX

I guess it depends on the wheel as well. With 23mm or less internal rim width you should be able to run 28mm tires. Not so sure with larger internal wheels. Pretty sure 30mm would not fit.
(I did use the combo 303s with 28mm schwalbe pro ones for a bit, and it worked but was tight to the point that my lbs wasn't happy about letting me do it... I since moved that wheelset to my road bike and use either swissside or aerocoach wheels on the px)

---

https://besse.info/
https://www.strava.com/athletes/2012033

I have Enve 6.7c witch is 25mm internal, with 28mm tires , have tried both conti and pirelli, both works great

Interesting. iirc I had actually issues with the height and not so much the width, so maybe it's fine with larger rims indeed (or the Schwalbe were different height than other brands which I did not try on the 303s. I ran latex tubes w/ 25mm then on the hooked narrower wheels...).

I plan to revisit my tyre choice for next season. Probably trying out the 5000TT with 25front/28rear.

---

https://besse.info/
https://www.strava.com/athletes/2012033