Pressure in CX tyres

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  • Pressure in CX tyres
  • steve_b77
    Member

    I just about to pick up my 1st CX bike, it comes with 32mm clinchers. I weigh in at 80kg and will be riding it mainly on bridle ways, forest single track, towpaths etc.

    What’s a good starting point for pressures in the tyres?

    Anyway of making them more puncture resistant too? I run tubless on my MTB’s, is that an option – ghetto style?

    Dibbs
    Member

    I use 80-90 psi on the Quantocks.

    samuri
    Member

    100psi in mine.

    Premier Icon amplebrew
    Subscriber

    We’re running 90psi on our Crux with 33mm Tracer tyres.

    JoB
    Member

    about this much (squeeze)

    pump them up really hard so that your teeth rattle out, when you get bored of that let some air out by degrees until you start to pinch puncture, add some more, that’s how much

    Premier Icon wwaswas
    Subscriber

    I weigh about the same as you and run mine at 60psi for anythign off road.

    They can be a bit ‘pingy’ on dry roots and stuff at higher pressures than that and bloomin’ lethal in the wet.

    gears_suck
    Member

    Depends. Are you a lump on the bike or not. Doesn’t matter what you put in them if you bang it around. However, if your light and nimble, you’ll get away with running lower pressure. It’s a bit of a compromise because if you do want to climb loose or technical stuff, you could drop it a little to get a bigger contact patch. If you’re on smooth and hard stuff all the time you’ll want harder tyres for speed.
    There’s such a broad window it’s no possible for someone to tell you what’s right unless they’re out watching you.

    pixelmix
    Member

    For bimbling around on part gravel / part tarmac commute, 35psi. For racing on muddy off camber courses, about 25psi.

    Tubeless setup (Crest rims and regular CX tyres) and a skinny 5ft7 rider here.

    Too many variables to say a precise PSI, but I highly recommend going tubeless and dropping a few psi if you want some grip on off camber muddy CX courses.

    Can’t believe some of the PSIs above! I guess that is the price of running tubes.

    jonba
    Member

    30-60psi. 60 was good enough for the three peaks and any rocky stuff. 30 if I’m racing as grip normally becomes very important.

    TurnerGuy
    Member

    35 – Maxxis Raze on Stans Iron Cross.

    steve_b77
    Member

    I think a tubeless kit will be going on in the near future, first ride = first thorn puncture 🙁

    crikey
    Member

    50-60 psi, did the 3 peaks, does the road, does the off road.

    It’s less the price of running tubes, more about setting things up to do what you want them to do. Bimbling isn’t what my cross bike is for, and off camber courses are a special case. If I’m out for 30-40-50 miles, I’m not fannying about with spongy soft tyres.

    TurnerGuy
    Member

    my 35 psi raze run pretty well on the road, I think it is the central knob pattern, makes it run quite narrow on the road.

    FunkyDunc
    Member

    Just been over Baildon Moor/Buck Woods on mine, 60psi. Felt about right.

    vdubber67
    Member

    30psi for racing on clincher tyres, but more for 3 peaks (50-60)

    Some people must have no teeth left with the pressures above! 🙂

    FunkyDunc
    Member

    Vdubber – if your riding on grass or a firetrack lower is fine but if your riding on rocky more technical stuff you need higher pressures or you would be getting pinch flats every 2 feet.

    bol
    Member

    I’ve found a reliable (so far) tyre/tube/puncture mix which was to buy the lightest, fastest tyres I could (won’t be riding it in the mud all that much) and put a Panaracer Kevlar tyre liner between tyre and tube. I’m running circa 80 psi on my commute, and 50ish for playing. I’m pretty new to this myself though, so don’t really know what I’m talking about.

    Premier Icon senor j
    Subscriber

    I just bought some cheap shwalbe cx pro’s , which state a max pressure of 65 psi , I stick 75/80psi in at the moment. 🙂
    Tubes btw.
    Low pressures are more pleasant on rooty off road but I don’t want to wallow about on the road either.

    john_l
    Member

    35/40 psi for most stuff, lower on grassy fields. Happy at that pressure on the road too. Tubeless Vittoria XGs & Open Pros.

    Premier Icon tomd
    Subscriber

    Maxxis Raze here, I’m a little heavier than you. They said 75psi max, so I tried 65 to start and have worked down from there. 50ish seems good for all round use, and I adjust up or down depending on the terrain. Tempted by tubeless for off road.

    Premier Icon simon1975
    Subscriber

    I just bought some cheap shwalbe cx pro’s , which state a max pressure of 65 psi

    I hope those were very cheap, I’ve got the Schwalbe’s which go to 90 so I use all of that in the rear and around 75/80 up front. But I hop a lot of kerbs etc so don’t want pinches, and I want the cx bike to be fast!

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