Nawrockiwrote a review of Schwalbe Racing Ralph Tire -27.5in on October 24, 2016
Familiarity: I've put it through the wringer
This is for the 27.5x2.25 Racing Ralph, Snakeskin (describes the level of sidewall protection) Pacestar (tread material. This is faster, but less grippy compared to Trailstar) TL (tubeless easy). These seat easily and seal completely with Orange seal. I'd say the 2.25 has about the grip of a Maxxis 2.35 Ikon and rolls much better. Wear is fast, but they roll fast as well. I'd say 300 miles of northern Utah riding is about what you'll get out of them, but you'll be leaving your friends in the dust in the process. On a typical buff Park City climb of about an hour, I'm usually 3 minutes faster on these than a similarly spec'd Nobby Nic or even an Ikon. I wouldn't take them to Moab, though, as the rock would wear them down fast. I run them at about 24 PSI rear on an SB5c with 23 MM internal width rims.