Inov-8 Trailroc 255 Trail Runners

When I first read about inov-8Trailroc 255's, I saw them referred to as "the shoe the hiking world's been waiting for". How could anyone not be tempted by that?

Ever since making the transition to lightweight, non-waterproof, minimal trail runners for three-season hiking, I've been using inov-8 shoes exclusively. My Terroc 330s  are great for fairly even, average trails, while the Roclite 295s – my current favourite – are excellent in wet slippery conditions.

With sole featuring three types of rubber to help maintain grip, I was intrigued whether inov-8 might have come up with something even better in the Trailrocs. The promise of a shoe for all conditions, perfect for hikes over mixed terrain, able to cope with wet rock and gravel, mud and duckboards, all in one, stylishly hyper-efficient piece of footwear. It seems like an impossible dream...

I contacted inov-8 and asked if I could test a pair. After a few emails and a couple of weeks waiting for the delivery service to get their act together, a smart new pair of 255s landed on my doorstep.

You've got to admit, inov-8 have really upped their game with designs recently. While the 330s and 295s are nice, they look a little grey next to the sporty red accents on the 255s.

I'm not usually much of a one for branding, but I like the little touches...

But let's face it, we're not here to look at a bunch of pretty pictures of shoes, are we? What we want to know is: how do they handle on the trail?

I've spent the last three weeks wearing them constantly while mapping out trails for a guide book, which has given me the opportunity to test the shoes on about 120 km of extreme and varied terrain, including compacted, forest trails (soil, roots, brush), rugged, rocky trails (boulder hopping, open flat rock, rocky paths), mires (swamp, march, forest wetlands, mud), stream crossings, sandy ridges... pretty much everything except snow and ice.

But before we find out how they coped, let's get to grips with the sole.

The Trailroc 255s use a new compound called Tri-C, which combines three of the best materials featured individually on other inov-8 lines into one sole.  Inov-8 say it provides "the optimum balance of durability and grip" and believe "it's the smartest outsole ever made".

The toe area has a soft sticky compound, inov-8's "most grippy rubber". The ball of the foot and main (largest) area of the sole is Endurance rubber – hard wearing, with good all aound grip. In the arch area, a hard sticky compound has been used that protects you from hard rocks and stumps, giving "maximum grip and stability on even the most demanding trails".

Roll over the thinglinks on the image below to illustrate.

It's a neat idea. It makes sense. I've often wanted something exactly like this: a sticky rubber shoe for wet rocks and duckboards, a less knobby shoe for flatter trails, and a harder compound for reliable hiking over long distances.

So how do they cope? In short, pretty well – with some caveats.

General grip on average trails, as you'd expect with those wraparound lugs, is excellent. You feel a solid confidence with every step. But that kind of trail is easy – earth trails, small rocks and stones, mud and puddle slip by unnoticed.

On trickier, wet terrain the results are a little more variable. Most of the time, on all surfaces the grip was good. On wet rocks they gripped very well – most of the time.  They handled wet roots remarkably well, too – with the odd exception. The hard sticky arch area seemed to grip the roots better than I'd expected – usually. On wet duckboards, there was a definite grip – much better than, say, the Terroc 330s which I often find a little scary, or many of my other shoes which feel downright terrifying. Only occasionally – typicallly while walking on wet leaves on duckboards – did I start to notice any slipping, but wet leaves are notoriously unpleasant on duckboards: only studs are likely to overcome that problem.

In fact, I only encountered one surface on which the 255s failed completely, and that was a surface which, in all fairness, is almost impossible for any show to deal with: wet, lichen covered rock.

The photo above shows a particular type of lichen common to these parts which groves on and around moss. This kind of lichen was actually no problem for the Trailrocs as the moss creates a grippable surface traction. But there are other lichens that smother rocks up here that create a kind of greasy film when wet. When I stepped on these it was like walking on ice in football boots – utterly terrifying, with no grip whatsoever.

As I said, I doubt any shoe could deal with that, but for some reason the 255s dealt with it less well than the 295s. I walked over endless boulder fields in Kasivarsi with the 295s, bounding from boulder to boulder with gay abandon. I wouldn't feel comfortable or confident doing the same in the 255s. This lack of confidence based in not quite knowing how the shoe would perform soiled the experience of an otherwise excellent shoe. I suspect that the culprit is the Endurance compound used on the main part of the sole, but the result was occasionally disconcerting: I wasn't always sure if the shoes would grip, so I found myself tensing muscles to over compensate for any unpredictability.

Now, that might sound a lot like a damning condemnation of the Trailroc soles, but it really isn't. On all but the most difficult surfaces I encountered, the shoes gripped very well indeed, coping with almost everything the trail threw at them. it was




 difficult surfaces, like wet rocks covered with a particular type of lichen, that the shoes had difficulty. So all-in-all, it shoudl be clearly stated that I think inov-8s attempt to create a shoe for all surfaces has been remarkably successful. The caveat I mentioned is that it's performance on wet, slippery, surfaces is


, rather than


And if you're trying to be the shoe for all situations, being

good enough

, is probably the best you are going to achieve, and the 255's are definitely good enough.

But that's enough sole searching, what about other aspects of the shoes?

Perhaps it's a good idea to make some more direct comparisons with the Terrocs and Rociltes. Here are some stats which I'll refer back to:

And here is the lineup: on the left, the 

Roclite 295

s. Taking center stage, the 

Terroc 330

 . In the right corner, the new kids on the block, the usurper to the throne, the 

Trailroc 255

s. We're halfway to a threeway.

The astute among you will be thinking,

hang on a moment, they're all different sizes.

Well, shut it, clever clogs, because you're wrong. Or partially wrong. The 295s (left) are a size 46.5 (UK 11.5), but the 330s and the 255s are both 45.5 (UK 11).

If you're thinking,

those Trailrocs look small

, then I'd have to agree with you. Compared to the same-sized Terrocs, they felt smaller. My left big toe was noticeably under pressure, and the right shoe, near the bottom of the laces, was definitely tight. This is partially my fault, as I should know better by now and size up. I'm a UK 11 / EU 45.5 - 46 usually, and I find the larger Rocilte 295s just about perfect; the additional room of a larger size allows my toes to move, give my feet room to breath, and allows me to wear thicker, waterproof socks in them if I choose. I'd be hard pushed to fir a pair of SealSkinz in the Trrailrocs in the current sizing I have. But this is my bad – I should have asked for one size up. The apparently smaller size compared to the Terrocs is interesting though, and probably down to the different fit, from "comfort" in the other shoes, to "anatomic" in the Trailrocs. Apparently an anatomic fit "provides space for the toes to spread and adapt to the ground". Well, it was tight for me – I much prefer the 295s. YMMV.

Many people complain that inov-8s are narrow. I've not found that to be the case personally, but I would say this: definitely size up with the Trailrocs, unless you're going barefoot.

Talking of barefoot, here's another comparison. By pure chance, and to my complete and utter surprise, I discovered my local Prisma supermarket selling Trailroc 245s (note to foreigners: it is completely normal for Finnish supermarkets to have extensive clothing and other general department store-like sections. I say this because I knew another English guy who was shocked at the idea: "Buying clothes from a supermarket??? I just can't go there."). Anyway, I digress:

Trailroc 245

s in my local supermarket, as I live and breathe:

As you can see, the toe area of the lighter 245s has some very minimal protection. Hardly protection really, more a kind of taped, water resistant reinforcement (or perhaps an attempt to tone down the garishness). Here's a comparison with the 255s:

The 255's have a rather nice foam padding which extends around the exterior from toe to heel, at which point the stronger plastic visible on the sides ("protective rand", in inov-8 speak)  extends to give extra support.

Now, the Terrocs and Roclites also have circumferential protection, and it's very much needed in a hiking shoe. But I rather liked the foam of the 255s. It's enough to stop sharp prods from roots and rocks, and it keeps annoying chuff you encounter on trials out of the mesh. As you can see from the shot below, it extends higher than the protection on the Roclites. In fact, in the photo below, you can see that an area of mesh has worn away which would not have happened on the 255s.

Let's compare lugs next. As anyone who has worn them will tell you, Terroc 330s pick up grit faster than a Dyson. Although the 255s share some of the Endurance sole characteristics (notably less than ideal performance on wet wood), they also share the 295s more widely spaced lugs, which is good. It means less stones embedded in the sole. It's a minor point, but an improvement nonetheless.

As far as sole thickness goes, they all share a 6mm footbed, but the 255s are have only a two point shoc-zone, compared to the Terroc and Roclite's three. All this means is that the sole is a little thinner. I honestly couldn't notice much difference. I'd say the Trailroc sole lies, in the feeling of stiffness, somewhere between the Roclite 295s (in which you are aware of what you walk on) and the Terroc 330s (which are distinctly harder/stiffer). The Trailrocs are very flexible, yet firm. Again, a good all-rounder.

Another area of difference is, a-ha-ha, differential. The Terrocs and Roclites have 9mm difference from heel to toe, while the Trailrocs have 6mm. As with most inov-8 shoes, you need to get used to this less supported style of shoe, but once you do, your feet will feel stronger and happier. The 3mm difference in differential seems small, but it is noticeable. I'd say that over long distances, the 295s or 330s might still have the edge.

The uppers are all mesh, all non-waterproof, all very breathable and fairly quick to dry. I sometimes think that the Roclite 295 mesh is a little more padded, and slower to dry than the Terrocs, but it could be my imagination. The 255s seem a little less spongey when in comes to absorbing water than the 295s, but again, it could all be in my head.


So many shoes, so little time... If you walk on mixed, loose, or eroded terrain, with small rocks and roots amid lengthy earthy trails, the 

Trailroc 255

s pretty much hit a sweet spot. The protection, differential, and shape make them a very comfortable shoe for long distance walking – provided you size up. However, iIf you are hiking in very wet wilderness areas, or using them for slippery stream crossings, you might be better off with a full sticky sole, such as that on the

Roclite 295

, which still remains my preferred shoe for longer hikes. For even more sticky grip, the

X-Talon 212

is highly regarded.

Inov-8 trial runners are available from in the US, and trail running stores in Europe (like Prisma, Rovaniemi!). 

Terroc 330

Roclite 295

Trailroc 255

Trailroc 245

More from 

inov-8's website

Inov-8's Trailroc Tech Minisite

The Trailroc 255s were provided to Backpacking North for testing free of charge. The Terroc 330s and Roclite 295s were bought with money earned through nefarious skullduggery.