Vittoria is expanding its Gravel Endurance tire range with new 700x50c and 700x55c sizes across most of its Terreno lineup.

That means the Terreno T10, T30, T50, and T70 now get both 50mm and 55mm options, while the mud-focused Terreno T80 gets a new 700x50c size.

For those keeping score in mountain-bike terms, Vittoria says the new sizes are roughly equivalent to 29×2.0 in and 29×2.25 in.

(All Photos/Vittoria)

But Vittoria is not just chasing bigger numbers for fun. The move follows where the category has already been heading. Modern gravel bikes have more clearance. Riders are taking them onto rougher terrain. Bikepackers are carrying more gear. Racers are looking for more grip and more confidence. And plenty of riders have already been sneaking MTB tires onto gravel bikes when the course looks especially angry.

Why 50 and 55mm?

For years, 40mm and 45mm tires were the sweet spot for gravel. They still are for many riders. They roll well, clear most frames, and handle a wide range of mixed surfaces.

But gravel is no longer one thing.

One rider’s gravel is champagne dirt and farm roads. Another rider’s gravel is baby-head rocks, singletrack connectors, washed-out descents, and 100 miles of “who approved this route?” terrain. Add bikepacking bags, long days, bad weather, and modern frames with big clearance, and suddenly a 50mm or 55mm tire makes a lot of sense.

The advantages are not complicated. A wider tire gives you a larger contact patch, lets you run lower pressure, and generally improves comfort, traction, and control. On rough gravel, that can mean more speed because the bike is skipping around less. On loaded trips, it can mean fewer impacts through your hands, back, and teeth.

The key is to use the width without sacrificing the ride feel that makes gravel tires efficient. That’s where Vittoria is aiming with the new Terreno sizes.

Gravel Tread, Not MTB Tread

Vittoria is not saying, “Just put mountain bike tires on your gravel bike.” It’s saying wider gravel tires can give riders some of the stability and comfort they want without moving into full MTB tread behavior.

MTB tires are great for the forest and wooded conditions, but they aren’t a one-to-one swap with gravel treads. MTB tires can offer more aggressive knobs, thicker casing, greater weight, and higher rolling resistance than a rider may need for mixed gravel terrain.

That can be great when the course is mostly mountain biking with drop bars, but it is not always the fastest or most comfortable setup for long gravel rides or races.

The expanded Terreno Gravel Endurance range offers more width while retaining gravel-specific tread patterns. That means the tire choice can still match the terrain: hardpack, fine loose, mixed surfaces, coarse loose, or mud.

Which Models Get the New Sizes?

The new sizing rolls out across the Gravel Endurance range like this:

• Terreno T10: 700x50c and 700x55c
• Terreno T30: 700x50c and 700x55c
• Terreno T50: 700x50c and 700x55c
• Terreno T70: 700x50c and 700x55c
• Terreno T80: 700x50c only
• Price: $81.99

The T10 through T70 models are available in both black and brown sidewall versions. The T80 is listed in black sidewall only.

Vittoria.com

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