Yeah the rim bed needs to be raised up a fair amount, the tires weren’t sealing the first time around. Was thinking of Gorilla/Duct tape first on top of the rim strip and then a layer or two of tubeless tape on top of that to provide a seal.
The reason for the bump is going around turns and off-camber roads. There’s a fair amount of lateral load on the tire and I haven’t work out the loads required to burp a road tire.
What tires are you using? How old are those wheels?
I have a couple pairs of superteam wheels and don’t have issues with tires coming off. If the bead rolls over the rim, I don’t see how adding material to the rim bed helps. It’s the tire/wheel combo not matching up or the tire bead being stretched and rolling over the vertical part of the rim. In this case I would look for a tire like the prior version of the Conti GP5000 TLR which was notoriously hard to mount because it was so tight.
If the concern is that tire bead will fall into he channel, it’s not likely to happen if you’re running proper pressure. I’ve had wheels where if I let them fall to 10 psi they would come unseated, but if you air them up to 60+ where they should be, it was not an issue (and that was on road bike and racing).
You can certainly give that plan a try, but I’d just think it’s a lot of extra weight, mess, and hassle in the future.
Edit- just read your response. So it was leaking at the bead rim bed interface? You’re sure? I only ask because I’ve thought that before and it ended up being a bad tape job or the valve stem not seating/dealing.
How old are the tires and what kind?
Wheels are 1 season old, Conti GP 5000. The tires don’t come off the rim, they just don’t seal properly when set up tubeless (on these clincher rims, without the bump).
It wasn’t even that the setup was leaking, it’s that it wouldn’t seat at all (at the bead/rim interface, yes). Air compressor turned up as high as goes and it would sometimes push out to the wall but never get any real pressure. So I need something to raise the rim tape high enough that it seals. The secondary hope is that a tighter interface holds the bead a little tighter against the rim as well, without the standard tubeless rim bump/ledge that normally hold it.
Tires are for sure TR or TLR? Or are they clincher version?
Interesting. I’ve never had that happen but there’s a first for everything! Suppose you could give a try and see.
Def the clincher version, the rim profile is the standard U shape smooth bottom
I’ve had this happen to me before - for the cleanest set-up, I usually like to try and seat the tire dry and then inject sealant through the valve stem, install the core and then pump with the floor pump. Some tires (Hutchinson Blackbirds and the Original Cadex Gavias) don’t seat without sealant first…and then its a chore too, because im blasting with a fully charged air compressor while bouncing the wheel at a few spots along the circumference - usually I bounce it int he locations where I see sealant weeping out the side-wall.
Your conti gp5000 is the tubeless ready (TR) version?
There is a standard clincher version too and it would more than likely be hard to seal as it’s not as tight to the rim.
Yep tubeless ready tire, clincher rim
And sealant in? How much?
ETA, I’ve also found that adding some water on the outside of the tyre (bead) and inside of the rim helps it slip into place. Only needed this on some really annoying MTB tyres though.
Yep, just eyeball the normal amount of sealant, maybe like a shot glass full.
It got me thinking that the ridge/bump was required to hold it in place, which set off the whole thicker tape thing, that I could just make the whole inside a little thicker.
what tape width are you using? I’d shoot for 21mm-23mm
…and putting down 2-3 layers may be OK too
I suppose just adding layers and layers of tape would work too. Used 21mm since I didn’t want it going up the sidewall too much on these.
I’ve done a couple tricks to get hard tires to take air to seat. I’ve used a soapy mix sprayed heavily along the interface in the channel/tire and on a couple really tough ones Marvel Mystery Oil or 3 in 1 oil will seal that gap allowing the tire to hold air and seat.
