They come in 33, 35 and 38 flavour. I’ve found with the Schwalbes they have fantastic grip off rd but the compound is so good they don’t feel at all slow on tarmac.
the ultra bites are a very similar tyre with just slightly higher knobs down the middle
On SRAM the olives thread on to the barb. It’s possible that you may be able to unthread the current one but I doubt it would go back on again and it will already be crushed by the calliper bolt. Easiest way is to just cut the olive and bard off.
Sorry, mine looks like this nowadays and Gets used for my 5 minute commute