I’ve got the 25mm versions to fit,
Are there any data on how well these grip and what their rolling resistance is, rr? Are they 'faster' than Marathon Plus (25w @ 60psi), for example? I thought you liked tread on your tyres. The Tannus tyre seems to be pretty slick.
A positive review from 'London Cyclist', noting that the tyres come in a range of colours too.
https://www.londoncyclist.co.uk/tannus-solid-tyres-review/
"Weight wise the 700×28 comes in at
430g per tyre, significantly lighter than a Schwalbe Marathon for example at
560g, excluding the inner tube and rim tape."
My M+ in (pseudo) 28-622 weighs 750+g.
In your ride leader role, do you (feel you) have to carry tubes, levers and pump anyway, to help those you're leading, in the event that they need help?