It looks like we’ve come full circle. I keep in mind when the 3T Exploro launched and everybody collectively misplaced their minds for a short while on the idea of an aero gravel bike. There have been gravel bikes since that actually take note of aerodynamics, however to my thoughts, there hasn’t been a motorcycle within the gravel section that focuses so closely on aerodynamics because the Issue Ostro Gravel. It’s unashamedly a gravel race bike, a lot in order that it’s UCI-legal for the highway.
Can one thing so specialist sit amongst the finest gravel bikes, and even the finest gravel race bikes? Nicely, I’m not going to let you know on this paragraph, however I feel as a motorcycle it poses some actually attention-grabbing questions for the way forward for the section, significantly if gravel racing and mass participation occasions proceed to develop and attain the extent of peak-fondo from six or so years in the past.
Design and aesthetics
I make no bones about the truth that I’m not overly enamoured with the aesthetics of the perfect aero highway bikes. Nevertheless, being a person of contradiction, I truly actually like the way in which the Issue Ostro Gravel seems. I feel that is partially as a result of it’s one of many first of its type, so there’s something of a novelty issue (pun not meant), however I feel it additionally has to do with the tough juxtaposition of such a man-made object getting used off-road, in a pure setting that’s simply form of cool. It’s so clearly inorganic, jagged, and targeted that it instructions slightly extra consideration. It’s a bit like seeing an influence station nestled someplace stunning; you may’t assist however have a look at it.
Let’s discuss design although, moderately than me telling you what you need to just like the look of. It’s clear from a look that this can be a bike designed to cheat the wind. No wattage financial savings are claimed over the competitors, and there are not any predecessors to check towards both. That being mentioned, the deep headtube, kammtail tube profiles, excessive backside bracket, and dropped stays are all options frequent to the finest aero highway bikes now. The totally built-in setup, and the selection to solely enable digital groupsets, are an additional nod to the high-performance goals of the Ostro Gravel.
Contemplating its a chunky body it’s remarkably mild. A 900g claimed weight for the body could be very skinny certainly. In all honesty that’s mild by highway bike requirements nonetheless. The total weight, with a bottle cage and pedals and a great glug of sealant in every of the tyres, was 9.19kg. Maybe not superlight by highway requirements, however for a gravel bike it’s fairly phenomenal.
The Black Inc. cockpit wouldn’t look misplaced on an aero highway bike both, and for those who’re searching for a brand new cockpit I’d truly advocate it; it’s very nice. You possibly can swap to a conventional bar and stem combo although for those who so want, because of the spherical steerer tube. This additionally signifies that, for the needs of becoming myself to the take a look at bike, I might plop some commonplace spherical spacers above the stem moderately than having a better stack than I’d like or slicing it off.
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It may be run with 2x programs it appears to have a detachable plate the place a derailleur hanger ought to be, nevertheless it’s solely obtainable as a whole bike with SRAM Drive XPLR or Pink XPLR. Naturally, I used to be on the fancypants Pink model, which does make sense for a motorcycle like this. The vary is ample and a 1x is extra aero.
Geometry charts may be fairly revealing too. Compared to my Fairlight Secan, the Issue is 5mm longer when it comes to attain, has a 0.3-degree steeper head angle, and has a 5mm shorter wheelbase. It’s additionally bought a 3mm smaller BB drop (the underside bracket is increased) and is taller on the entrance with an 8mm increased stack. That 0.3-degree distinction in head angle could not seem to be a lot, nevertheless it’s what permits the bike to really feel longer (longer attain/efficient prime tube) whereas additionally ending up with a shorter wheelbase. Small increments in BB drop even have a big effect, and whereas they appear related on paper the 2 are chalk and cheese.
A closing level, extra as a query than the rest: If you happen to can add 4 bosses for a bottle on the highest tube and underneath the down tube, absolutely you could possibly add a pair extra for some mudguards? Particularly given that is additionally marketed as an all-road bike, with the ability to keep dry and clear would actually be of profit. No, they’re not aero, however they’ll actually assist cease manure spraying all around the nozzle of your downtube bottle for one factor.
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Efficiency
When requested to carry out inside a comparatively particular vary of parameters this bike is totally sensational. On easy, well-graded gravel it’s like being shot out of a cannon. It’s taught and lithe and responsive, however most of all it simply kinda tempts you to take a seat in an aero place and deal with your journey like some type of gravel time trial. The stiffness is up there with any high-end highway bike for energy switch. On the fitting floor, it is vitally paying homage to driving an aero highway bike, besides the geometry is totally different.
The dealing with, once more supplied you’re on the fitting terrain, is sensible. You possibly can decide your method between rocks with ease when flying down tight corners and alter your line fairly fortunately with no second thought. A part of that’s the geometry, however loads of it comes right down to the tyres and wheels. The wheels are very stiff and stand as much as laborious cornering properly with out feeling mushy, however the tyres are an actual stroke of genius when it comes to speccing, particularly given tyres are normally the very first thing to get downgraded to hit a worth level.
This isn’t a tyre evaluation, however suffice it to say there was little or no left wanting from the Goodyear Connectors. Extraordinarily quick on gravel and on-road sections too, with aspect knobs that deal with off camber with ease and, to my shock, moderately succesful in mud too. Not like a cyclocross tyre could be, however for a general-purpose gravel tyre they had been tip-top and had been an especially complementary selection.
The groupset makes excellent sense too, contemplating the aspirations of the bike. The gear vary is such that no climbs are ever going to be an excessive amount of, both on or off-road, particularly contemplating you’re not realistically going to be strapping any actual cargo to the body. I did undergo from a barely sticky rear brake piston and a creaky backside bracket, however you by no means know the way media take a look at bikes have been handled earlier than they arrive.
Lastly, earlier than we dive into a number of the drawbacks, I’d wish to champion the cockpit. The form is nice, the flare is refined however there sufficient to make the drops really feel like a extra secure possibility. The drop is spherical and deep too, and the bars are slim sufficient to really feel at dwelling on an aero machine. What’s extra, the bar tape could be very grippy, and the tops have been wrapped too.
Right here’s the place issues begin to fall down barely: If you happen to take it on something remotely tough it’s disagreeable. The identical stiffness from the body and the elements, together with the geometry that makes it such a quick and responsive bike on the sleek stuff makes it jarring and laborious to deal with off-road. The rear finish has so little compliance that on rocky floor it is not solely uncomfortable in your rear finish but in addition it makes placing the facility down tougher, which successfully makes you slower. The perfect tactic is slightly like driving bikes over cobbles; go as laborious and quick as potential and hope you fly over.
Uncommon is it that I’ve to chop a journey brief for discomfort causes, nevertheless it did occur with the Issue Ostro Gravel. It jogged my memory so much in some methods of the Ribble Extremely SL, in that its hyper-focus on a single intention has truly gone as far as to be detrimental for the generalist.
To preempt what I’m positive a few of you might be itching to say, sure, you may spec wider tyres to enhance compliance. My retort to that is twofold. Firstly, that is the spec I’m testing so in that respect I’m a trifle hamstrung. Secondly, and extra importantly, the bike is marketed as optimised for a 32mm tyre. If you happen to’re racing and it’s a must to use a much bigger tyre simply to bear driving the factor then you definately’re each including weight and rolling resistance in an effort to impact compliance that will, from a efficiency standpoint, be higher provided by a extra versatile rear finish. It’s the place I feel the Specialised Diverge is onto one thing with its utilisation of suspension, although I am not completely bought on the supply. Easy is, to a point, quick I’m afraid to say and past the realms of lovely fireplace roads, the Issue Ostro Gravel is definitely hampered by itself. Given the proprietary seatpost, you cant use one thing like a Redshift seatpost so as to add consolation whereas sustaining the low rolling resistance of narrower rubber.
On the highway, it’s an especially nice expertise. It feels very very like an endurance highway bike, however with less-than-ideal tyres. In all honesty, I recurrently felt relieved to get again on the tarmac, which isn’t precisely a glowing indictment. The dealing with remains to be nimble sufficient to really feel alive on roads, and I feel Issue is justified in advertising and marketing it as a viable all-road bike as a secondary goal.
Now for a troublesome query. In my view, this bike is just actually viable as a race bike on well-graded gravel. The inaugural gravel world championships had been received on a Canyon Final highway bike operating a 32/25mm entrance/rear tyre setup, and an analogous setup additionally on a Canyon Final for second place too. With this in thoughts, do you really want a gravel bike for easy gravel anymore? For essentially the most half, you’re gaining the geometry of an all-road bike just like the Trek Domane or dare I say the Specialised Roubaix, and upgrading the aero bundle drastically however decreasing the flexibility by an equal quantity. I’ve examined the Roubaix and I feel I’d moderately slap some 32mm tyres on that for my standard gravel driving.
Worth
Oh boy, okay. It’s ten grand. That’s not fairly Trek Domane SLR 9 cash, nevertheless it’s ‘solely’ three grand shy and it’s a much more specialist machine. Given its specialism for a self-discipline that’s nonetheless comparatively youthful, it’s helpful to border it as if it had been a distinct self-discipline solely. In case you are actually into your native time trial scene you could not suppose £10k is an absurd amount of cash, and likewise, for those who’re into hill climbs you could not suppose something of dropping 10 grand on a motorcycle construct that finally ends up weighing the identical as a sneeze. I consider the Issue Ostro Gravel is so specialist it’s nearly on a par with these disciplines.
If you happen to actually are racing on gravel, easy gravel, it’s an excellent little bit of package and you’ll be quicker, nevertheless it’s completely a race bike and solely a race bike, and it’s a must to be ready to doubtlessly have fairly an uncomfortable time.
Given its specialism, I can not say it represents any type of worth. I’d wrestle to counsel it even for racers as a result of consolation is genuinely a think about longer occasions. The considered doing one thing like Unbound aboard this makes me wince, and sadly that’s successfully what it’s designed for. Something tamer and you could possibly equally simply use a highway bike and have a greater highway bike on the highway due to it.
For ten grand you could possibly hook your self up with a Canyon Final with Ultegra Di2 and a dual-sided energy meter, and have 2 grand kicking about for a set of the finest gravel wheels and the finest gravel tyres and also you’d have a setup greater than able to profitable Gravel Worlds (for those who’ve bought the engine) and any highway race you could possibly consider too.
Verdict
After I write bike opinions I typically get a really reachy metaphor lodged in my consciousness. On this case, it’s kitchen knives. To me, a gravel bike ought to be some variation of a chef’s knife. It may possibly do most issues within the kitchen fairly properly. The Issue Ostro Gravel is a fish filleting knife; for those who’re on the fish part then it’s completely going to be of use to you and can make your lifetime of filleting fish higher and quicker. If you happen to solely not often have a name to take the bones out of an entire turbot although it’s largely going to be an annoyance, particularly if it’s a must to chop carrots, peel a courgette, or shred the cabbage.
What I’m attempting to say is it’s excellent at one factor, and for those who try this one factor then it’s an excellent possibility, but when you could race gravel and do extra common driving then I feel you should purchase one thing else. To compound this barely there are highway bikes on the market now which are maybe equally good gravel race bikes now for much less cash.
| Attributes | Notes | Ranking |
|---|---|---|
| Design and aesthetics | It seems cool, and thought has gone into it. Smart BB and spherical steerer win factors | 9/10 |
| Construct | SRAM Pink mixed with the Black Inc ending package is a profitable recipe. Glorious tyres are the cherry on prime. | 9/10 |
| Efficiency | it is a superbike inside its consolation zone however disagreeable to journey out of it | 7/10 |
| Weight | It is class main for gravel bikes, and actually cannot be faulted | 10/10 |
| Worth | It is not sufficient to be akin to a highway bike when highway bikes themselves are profitable gravel races | 1/10 |
| General score | Row 5 – Cell 1 | 72% |
