I haven't been able to find a hole in the tyre with a visual inspection or by feeling around the inside of the tyre. One thing that stood out to me was the tape around the rim has a puncture at one spoke point. I don't know enough about tubeless setups to say that this would be the cause or not.
The rest of the spoke holes look fine, this is the only punctured area of tape.
On a tube setup I'd normally re-inflate the inner tube with some soapy water on the exterior to find the source of the leak before replacing the inner tube. With the tubeless tire I'm having trouble getting it on the bead the whole way around and I only have a floor pump.
How can I find the cause of the original pressure loss and begin to make repairs without access to shop air supply? Is the tape puncture the cause? Can I use methylated spirits to remove the remaining dried sealant?
Thanks in advance!
update 1: LBS who retailed the bike recommend following the specs on the tyre. The tyre was running right in the middle of the rated range.
update 2: Giant recommended running within 5 PSI to the centre from each of the upper & lower limits specified on the tire, with a few caveats. Backpack, panniers, would push the recommended PSI up a bit. Rider weight & personal preference would also have some bearing on the running PSI. 100 PSI (dead centre of the recommended range) shouldn't be a problem for the tape at my weight at all but If I desired a softer ride I could drop the pressure a bit.