[Closed] Tubeless on CX

I set mine up as MTB, roll of electrical tape, then a layer of gorilla tape, job done.

Wtb cross boss tubeless. Stays up perfectly fine

Use tubeless ready tyres would be my advice. You'll almost certainly be running higher pressures than on a mountain bike- I run up to 50 psi or so - and you don't want the tyres blowing off the rim thanks to a slack bead. Otherwise it's pretty much the same.

The smallest I've gone with tubeless is 37c. It's mostly the higher pressures when you get to smaller sized tyres that's the problem, the sealant is being forced out of the puncture hole too quickly for it to work until the pressure drops. So rather than it being all but unnoticeable as on MTB you do lose some pressure on road. The 37c were at about 50psi so it wasn't too bad.

No need for special rims - I did mine on cheap clincher rims from On-One that weren't advertised as tubeless ready. As @weeksy says: same setup procedure as for MTB.

Ok, I thought tubeless pressures were limited to 40psi or so without special considerations.

The pressure drop isn't a huge issue as it's inevitable surely? Trails are rough here, so I'm thinking it'll be much more comfortable on smaller tyres when run tubeless due to lower pressures. The bike supposedly only takes 35c.

Just go for that as normal 🙂

I ghetto converted 28c Schwalbe Durano Plus on 17mm internal rim without major issues. Using pressure between 35 and 60PSI. Depending on whim...

No problems with that since spring 2018.

Good commuting upgrade, as I had loads of punctures with little shards of glass or wires.

Cheers!
I.

I use 35c Cx tyres tubeless on my Planet X, I tend to run about 40 psi being a big lump and there is a bit of road work on our rides and I don't want too much deformation cornering. Set up same as a mtb tyre, stans tape and sealant. I always use vittoria tnt tyres and seldom have any problems fitting them (onto aileron or stand rims) If you go to low you get a lot of grip but I also found the ride became uncomfortable as every rock strike would reverberate straight through the rim, its finding that sweet spot.

potentially silly question: why would one be running 40 or 50 psi on a CX bike? I'm racing tomorrow and have set the 33mm tubed tyres up at 18psi (due to the rain coming tonight). I was planning to go tubeless so I could go lower

my cx bike is tubeless and also has some 25mm backer rod in it to keep it rolling if it burps itself to death; hasn't yet (run pressures down to low 20s sometimes - I'm about 80kg)

Whilst not being CX tyres I’m using Secteur 32 on Hunt 30 carbon rims at about 45-50psi. We did 300km
Light touring in the Vosges week before last and they worked well including some 70-80kmh descents and hairpins in very heavy rain. Both on roads, on cycle tracks and some gravel.
I’d be very wary about going smaller than 32mm for the reasons previously stated before.

Racing has different requirements to 50-100km on tracks, bridle ways and bits of road on my CX bike.Outright grip above all else isn't what I'm after whereas for you that's going to be very high up on your requirements .

Have seen friends/competitors burp tyres on faster courses or courses with BMX track sections, probably worth building up rim as much as you can!

I'm sticking with 40psi for now!

I’m racing tomorrow and have set the 33mm tubed tyres up at 18psi

I'd be on the rims if that were me! Also, down here the 'gravel' riding consists of tracks across the mountains which are stony and rough. You'd not last 5 mins at 18psi. I run 20-25psi in my 2.3s!

Ive let mine down to 20-25psi and while it works well enough on muddy tracks its horrible on tarmac. Obviously in a race you want grip on the muddy field sections and a bit of rubbish handling on the start/finish car park section is excusable. On an XC ride its less fun if every slight pump in the trail means running on the rims!

Ok, I thought tubeless pressures were limited to 40psi or so without special considerations.

Not on proper road rims and tubeless tyres. A lot of MTB rims have max suggested pressure of 40psi or so but a road tubeless rim can go as high as you want.

I gave up with road tubeless though as whenever I punctured it basically didn't;t work due to the high pressure. Hole doesn't seal, tyre goes down, tube put in to get home. Sort of misses the main point of tubeless for me.

They aren't tubeless specific rims. Dunno what they are tbh.

Sort of misses the main point of tubeless for me.

For me it's lower pressures for no corresponding increase in pinch punctures and the same RR.

For me it’s lower pressures for no corresponding increase in pinch punctures and the same RR.

Until you go too low smack a rock and ding the rim and it won’t hold air (don’t ask me how I know that!)
I think with the smaller diameter cx tyre as opposed to a mtb tubeless you have to be a bit more careful going too low on psi.

I ran wire beaded 26” CX Pros (only 559 option around) on Stans Crest with no issues and raced them in cross on my SS mountain bike. Took a lot of sealant for the sidewalks but once they sealed I never touched them in two years. Including running silly low pressures in some slop.

Looking at some 700c options for my cross bike after a pinch flat at Swinley yesterday. For low pressures I think having tubeless runs to grip the bead is a good thing. Proper tubeless tyres will only help with this and low pressures. But ghetto and non TL are ok at lower pressures. Don’t do the same on road!

Ive been using non tubeless tyres on crests and its worked fine although theyre a bit porous. I think crests are rated to 50psi with cx tyres, which is plenty, im 90kg and run 38c tyres at 30-40psi, i probably wouldnt want to run 33c tyres as it would mean higher pressures, but im not at a racing weight so why would i want tyres intended for skinny dudes?

Road tubeless, seems to seal at a reduced pressure and get me home. Left it for a week with the 60psi left in it and it pumped up again to 100psi just fine. So its not as bulletproof as mtb tubeless, but its hard to say how many punctures its sealed without me knowing either!