Sorry for continuing my thread hijack, but I don't want to refuse free help here.
From the receipt from the shop, which is still in my email for easy copying and pasting:
- Competition Spoke Pricing SKU
- DT Swiss 2.0 x 12mm Black Brass Nipple
- Tubeless Rim Tape by the Foot
- Velocity Quill Rim - 700, Rim, Black, 32H, Clincher
- Teravail Cannonball Tire - 700 x 42, Tubeless, Folding, Black, Durable
And they sold me a bottle of Stan's sealant, which I assume is in the tires as well - or was, the first time they were set up tubeless. I don't know what's in there now.
The first time I went for a ride with this setup, I hit a goathead thorn (we have tons of them around here) and got a flat tire. It turned out there were tubes in the tires, even though I had paid for a tubeless setup.
I took this picture on the side of the road with my phone after being so surprised to find a tube after I had paid for a tubeless setup.
I went back to the shop and they apologized as one might expect and set them up tubeless while I waited and at no extra charge. It's a busy shop in Denver and I have no reason to think they don't know what they're doing.
Then the problems I described above started happening. The shop that did the initial setup is near my office but not my home, so I've gone to another reputable shop close to home since then. Each time, I've explained the history and they've said things like, "Hmm, maybe they need to be re-taped". Each time I've paid $40 for the setup but the situation hasn't improved.
I went back a couple weeks ago and the tires are still holding air (the last time I looked) but I haven't ridden it yet. Yeah, I know, but I'm busy with work and a wife and teenage kids, so my time isn't always my own.
Thanks for the interest and willingness to offer advice!
That is a road racing rim with an internal width of 21mm (road width rim). The tire (42mm gravel width tire) is likely too wide, particularly at low pressure, to run on that rim width. I'd recommend a different and slightly more narrow tire. The Teravail website recommends a 25mm rim width for that tire. I don't know why a shop would pair that rim with a gravel tire??
Check out the Teravail website for the correct rim spec. https://teravail.com/blogs/resources/bike-tire-size-guide