the 'there's no such thing as a stupid question' bike maintenance thread

Thomson tyres? Where did they come from? The originally fitted Triban branded ones are the same as the RC120 comes with, & I could get them on & off just with my hands.

The wheels might be a bit different, but hardly in a way that makes trouble like that.

So, I bought a new Giant TCR Advanced 2 disc from a Giant store in France.

I'm back home but I'm looking at the tyres.

Does anyone know if they come set-up tubeless already? no tube and with with sealent added?

Or are they merely tubeless ready - with rim tape already added, need to remove tube and add sealent.

How would I check?

Yeah, it's got the thick locking ring alright.

Just checked the website and as you say it says sealent added.

I'm going to assume they are setup tubeless.

Any recommendations for tubeless tyre pressures for Irish roads?

I keep them around 80-90 range most if the times

I'm running 70-75 on 28mm tyres for the past 4 months or so with no issues. I played around with pressures between about 65 and 80 and that seemed to be the sweet spot for me though depending on hoe heavy you are that might vary - I'm around the 90kg mark at the minute, though if/when I shift some of that, I'll likely back off the pressure a bit

If you're going that high, I'd make sure there's no upper limit (hookless rims for example usually have a limit in the low 70s). For what it's worth, I'd usually have run 25mm Conti 4 seasons around the low 90s (with tubes) and I think only ever got the one pinch flat (which in the particular circumstances would have been hard to avoid)

As a mountain biker who has been running tubeless tyres, over the most extreme surfaces for about 3 years without a puncture!

I'm completely sold on Tubeless tyres.

In a mud-fest I can lower the front tyre pressure to 16psi on my 2.5inch tyres!

I have zero experience of tubeless on the road though.

I'm 68kg and the bike is ~8-9kg.

What kind of levers are on the bike as it is? If they're brifters of some kind then it almost certainly has calipers with the same cable pull as the rim brakes.

Yeah, the same levers would be used for rim & disc. Of course, one would assume this is a properly spec'd bike, with 'road' type calipers.

What type of valve is this please? Is it actually a Presta? It lets all the air out as soon as you unscrew the silver wheel. A neighbour got given a bike with two of these on it and I couldnt get a fit to pump it without losing half the air, would a Shrader to Presta adapter work for his Schrader pump?

Okay thanks, thats weird that I never heard of that, this will do the job I assume?

That valve brings back memories. Haven't seen one in decades.

The only thing I can think of is that li-ion batteries don't deplete lineally. If you've ever used one in a battery powered tool, you'll know that they work, and then just stop, pretty much

Can anyone help?Im restoring an old C40

I can't get the left crank off.

Can it be tapped off? Any other ideas ?

The self extracting bolt came apart and now won't work,It's a Dura ace 7700 crankset it's cream crackered.I just need to get crank arm off

Thanks Boardies