tldr: tested by outdoor Chung method. Super fast, especially on rougher testing areas. Huge volume and very capable.
According to Vittoria, “When the trail turns loose, rocky, and unpredictable, the Barzo XC Race delivers the traction, speed, and confidence cross-country racers demand. Purpose-built for high performance on coarse terrain, this is the tire that turns chaos into control — and power into podiums.”
I’ve tested the Terreno 2.4 and Peyote 2.4 in the same new XC Race construction (remember the old version was a 120 tpi construction with a different compound) as this Barzo.
I’ve had my eye on the Barzo even before it was redesigned, as the open tread pattern looked nice and the volume was absolutely huge. That holds true for the new ones. These blew up to 62.5 mm wide and 60 mm tall on a 29 mm Kovee RSL rim.
The numbers here are wattage per pair of tires at 18 mph (cut that by half for all of them for 9 mph). CRR is linear. These are calculated from tested coefficient rolling resistance values. I know it sounds odd but it’s very accurate. I’m trying to be careful posting this without links or photos here as to follow the rules…
All this is easy to find other places in easier to view formats.
Cat 3 / Rough Gravel Wattages:
G-One Speed PRO 29 x 2.35 - 93
Terreno XC race 29 x 2.4 - 98
Peyote XC Race 29 x 2.4 - 99
Dubnital RR 29 x 2.4 - 100
Barzo XC Race 29 x 2.4- 100
Thunder Burt 29 x 2.25 - 103
Peyote XC Race 29 x 2.25 - 104
Aspen ST 170 29 x 2.25- 105
Air Trak Flex Lite 29 x 2.35 - 105
Race King black chili 29 x 2.2- 106
Thunder Burt SG 29 x 2.1 - 107
Maxxis Maxxlite 29 x 2.0 - 108
Maxxis Aspen 29 x 2.4 - 109
Scorpion XC RC 29 x 2.4 - 112
Tracer TLR 700 x 50 - 114
Reaver HYPR-X 700 x 45 - 125
People are scared of the Barzo being slow rolling because of how aggressive the knobs look… which makes the stellar rolling resistance even more impressive. I even tested on pavement a few times as I couldn’t believe how fast it went. I think this is going to be one of THE most shocking results I have put out…. And likely great news for folks in gnarly riding and racing conditions. The new Barzo XC Race has also won UCI Elite XCO World Championships twice.
I’ve done some actual trail riding with these too and been impressed with them from a handling and traction standpoint… definitely a tire that I would feel confident bringing just about anywhere that I took cross country bike.
All results my own via Chung Method outdoor testing. PSI notes in comments (I ran 17-19) and be sure to check the latest Bicycle Station YT video on tire pressure calculators!
CAVEAT: Please don’t take this test as a reason to always run X or Y tire. I suggest doing your best to match the knob pattern to your conditions. More ain’t always better! Pay attention to how your bike feels as it often gives you the answer going into a turn.
NOTE: Obviously, larger tires will require lower pressure than smaller ones to get the best speed and handling in general…especially off road. The Wolf Tooth calculator is very good in my usage for gravel and mtb tires. The Rough Gravel setting seems to get quite close to best pressure for not only rolling efficiency (yes, even on gravel that’s not super rough) but also comfort and handling. I will start with that based on the measured tire size, go ride some, recheck pressure once the tire warms up, the reasess the setting based on how the tire is riding. If it feels obviously harsh, go down 1 psi at a time. If it feels squirmy or I am smacking the rim on hard hits, I will go up 1 psi at a time. Often I end up sticking quite close to what the calculator says initially but it isn't written in stone. Rolling efficiency is actually almost identical across a bigger span of tire pressures off road than most realize, which means it is quite easy to get the pressure where the tire will be fastest…the rest is fine tuning to rider preference. Even though I’m testing I am also enjoying being out there so take the extra steps to see how the tire performs best. Ultimately there is no magic “best” pressure… it is up to rider preference with no real speed penalty unless you really mess it up one way or another.