Odd, never happened to me

And valves can indeed get clogged from sealant, but it doesn't happen often.

@Szabolcs Did you inject the sealant through the valve?

@Szabolcs Yeah it's quite normal and I wouldn't think about it too much. As Criggie said, be mindful of the valve orientation when operating the valve.

Also don't listen too much to me - I don't even ride tubeless :)

@Szabolcs one of the sealants I used fouled the valve cores rubber seals. I had to replace it. In one bike with a leaky valve core I had the valve stem fill with coagulated sealant. It was easy to fix with a stick.

any idea if epoxy is going to cure properly at ~11°C? Had to glue the metal chainstay protection back on on the old road bike yesterday

and the basement is only 11°C right now because it’s so fucking cold

@Michael what brand of epoxy ?

I would suspect that's too cold, and likely too damp as well.

@Michael I'd suggest you hit it with a hot air gun, or even a hairdryer.

Probably not an open flame

uhu.com/en-en/products/…

looks like it cured just fine, a drop which landed on the floor was nice and hard

Give it way more time to cure than at balmy temperatures.

@Michael "For optimum performance it is important to create a larger amount of adhesive and mix it very well. Curing time depends on the temperature. Adhesive does not cure below +5 °C."

So 11°C is fine

I’m actually surprised it got that nice and hard within 18h or so, considering they say maximum strength after 24 hours at much higher temperatures

Uh, how do you replace the protection if it's epoxied on...

It's a road bike, you don't need to "replace" protection, they are optional to start with :-p

Isn't the very point of any protection that it is a sacrificial part and will wear?

Rant aside, if it's the metal plate on the chainstay at the level of the chainring, it's always glued, I've never seen a case where this protection is screwed.

(and for the one on the chainstay to protect against chain strikes, it's often only helitape, or indeed a plastic part that can be replaced - but it's screwed then)

I see, I suppose it's mostly a thing on CF bikes, so I don't have experience with that

Mostly a thing on bikes with paintwork, but the quality of the protection depends on the level of finish of the bike, so most alu bikes are out of the "advanced" protections. The gravel bike (carbon) and the lazy bike (alu) have a screwable protection (against chain strikes), all the others only helitape. At the level of the chainring, nothing on all bikes.

My Ti bike doesn't have one, but I added some heli tape 😜 pretty unnecessary though, never get chainslap or dropped chain

The gravel had quite a bunch of protections (plastic for the chainstay, and on the lower part of the downtube) + helitape for the downtube and near brakes. But I couldn't help my self and made an order at ridewrap...

(especially for the top tube, there's a big cutout in the saddle, that allows a lot of mud to go on the short, and then I had the impression to sand the top tube with the clothes)

Saw this in a shop. Wouldn't the strap around the head tube quickly destroy the paint?! It moves when steering...

@Michael nice and hard != maximum strength

if we use the approximate rule that chemical reactions double in rate with every 10*C increase in temperature, it will take roughly 48h for that epoxy to fully cure at 11*C

@Erlkoenig Yes - it would slowly saw its way through the clearcoat then the paint underneath. Would take a while though

Wouldn't it depend on how tight it is, and how rough the surface is?

I mean I have a spot on my head tube where the paint is rubbed off from the cables brushing it as it turns back and forth, so you're probably not wrong, but I can see a case where a properly prepped strap wouldn't, especially if it's just a retention strap and not under tension.

@Erlkoenig And given it's a (e-)gravel bike, the strap will probably quickly be full of sand, which would only accelerate the effect. But at least there's nothing around the FutureShock.