3T Exploro Review: Hyper-engineering.

The new 3T Exploro has a dozen built-in, proprietary technologies. Nameplates like ‘GravelPlus’, ‘Sqaero’, and ‘RealFast’ permeate its marketing. Such labels generally make our eyes gloss over. But considering the implications behind the bike’s name, as well as its tagline – Going Nowhere Fast – Logan just had to try it. Read on to find out if the Exploro lives up to both its aspirations and its tech cred…

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Even though the Exploro won Gold at Eurobike, I was completely unaware of it — or 3T for that matter — until Interbike. Come to find out, 3T is an Italian company originally founded in 1961 as a steel tubing manufacturer (Turin Tube Technology). In 1984 3T made a name for itself with the Superleggero drop bar, at the time one of the lightest drop handlebars on the market. More recently 3T has focused on carbon components, including a variety of mountain and road handlebars and wheels. During their most recent chapter they brought in Dutch serial bike engineer Gerard Vroomen to design the Exploro. That name might ring a bell for a few readers; Gerard was an original founder of Cervélo, now one of the largest triathlon bike manufacturer in the world. Or more recently Gerard co-founded OPEN Cycle which introduced the O-1.0, the world’s first sub-900 gram hard tail, and the U.P. (Unbeaten Path) which combines performance-oriented road geometry with clearances for mountain bike tires. All this makes it no surprise that Gerard’s latest creation, the 3T Exploro, is an extremely lightweight carbon frame geometrically designed for speed… and off-tarmac exploration.

3T Exploro Review

  • 3T Exploro Review
  • 3T Exploro Review
  • 3T Exploro Review
  • 3T Exploro Review
  • 3T Exploro Review


Aside from the name, we took interest in this bike — probably also why most of you clicked on this review — because the 3T Exploro looks like a high end road bike with beefy tires. 3T calls it the GravelPlus standard, which simply means that the Exploro was designed to accommodate hefty 700c road and cyclocross tires, as well as voluminous 27.5 mountain bike knobbies. For model year 2017 there are several bike companies making a similar claim. This is fair considering a 700c x 33mm tire and a 650b x 2.1” tire have virtually the same diameter and therefore the same predictable handling. Plus there are more and more people trying melding different types riding with a single bike. In essence, depending on how mixed you like your terrain, and how much tire floatation and bump absorption you are looking for, the Exploro can be adapted to fit. It’s also worth noting that Gerard Vroomen’s OPEN U.P. and now the Exploro are two of the first bikes to employ this approach with such aggressive road geometry.

  • 3T Exploro Review
  • 3T Exploro Review

3T Exploro Review

  • 3T Exploro Review
  • 3T Exploro Review

For our demo bike, 3T gave us the option of either setup. Given what I knew about the bike, and the fact that I anticipated riding it mostly on road and gravel, we opted on the 700c config — with the bigger and somewhat aggressive tires keeping in mind that we’d likely end up in the mud somewhere along the way. 3T shipped it with a 45mm WTB Riddler up front and a 42mm Nano in the rear. These were pretty good choices in terms of traction and clearance. Both essentially maxxed out the allotted space with the rear suffering the most — as seen in the top left photo above, there is all but a few millimeters left between the seat tube and tire. The Nano performed well for traction, and the Riddler added a little fast cushion up front with decent side knobs for cornering.

In hindsight, I kick myself for not going with the 27.5×2.1 option. I ended up riding out of bounds a lot more than anticipated. During the few months I had the bike I took it on a ton of gravel day rides, but the bike begged to be ridden further, so I found myself jumping on singletrack connectors and exploring old logging roads that petered out into nothing. Bigger tires would have been ideal. Second, I had some significant toe overlap with the 700x45mm rubber. A little toe overlap is sometimes acceptable, although not ideal. But when it pushes a half inch or so it can impede technical riding. With the big 700c Riddler up front, I had well over a half inch of overlap and I often found myself in situations where this was quite annoying, particularly while methodically picking through rocky areas where there were often sharp turns of the handlebars. Fundamentally the Exploro is an incredibly short bike. My feeling is that this tire was simply too big for the bike. The 650b 2.1″ Nano would have been ideal I think, especially on singletrack and rough two-track where I spent a fair amount of time. For pure gravel enthusiasts running 700c, a set of 40mm Nanos or Clements would likely make a fine choice.

3T Exploro Review, Exploro LTD

“Sqaero” and “RealFast”

Aero-gravel — I admittedly scoffed at the term when I first heard it. Yeah, it’s a really cool looking frame, but airfoil inspired tubes on a bike marketed for off-tar exploration? Such a precept might only be relevant to a handful diehard gravel racers wishing to attack headwinds in the midwestern US. However, after digging a little deeper, the Sqaero tubing design is kind of interesting. Vroomen set out to combine the wind resistance of the tapered airfoil design with the strength of square tubing to achieve the best of both worlds — so essentially the leading edge of the down tube, seat tube and others have a tapered shape while the rear is squared off. The design was developed to work with the airflow of big tires, bottles and mud splatter, according to Vroomen. This is where the RealFast monicker comes in. As such, 3T performed aerodynamics tests that do in fact show results. According to 3T, as shown in the graph here, “A muddy Exploro with 40mm knobby gravel tires and 2 water bottles is faster than the equivalent clean round tube bike is with 28mm slick road tires and without bottles (grey line).” Whether shaving off a few newtons during ride on National Forest roads is indeed palpable, is another question. The theory is that when on pavement the Exploro can match the performance of a good road bike. One thing is certain, the Exploro is fast. I’ve never been a road cyclist, nor do I wish such a fate, so I haven’t had much experience with that type of bike. But I will say that the Exploro is the fastest feeling bike I’ve tried to date. Tron is one metaphor that came to mind as I crushed miles hugging the bike with an arched back, even on long climbs.

3T Exploro Review, Exploro LTD

  • 3T Exploro Review
  • 3T Exploro Review

Trail Lingo

By virtue of an incredibly short design via a steep head angle, short trail, and incredibly short 415mm chainstays, the 3T Exploro likely offers one of the most responsive and fast rides you’ll get with a bike in this class. On mellow to moderately steep gravel and pavement it handles and accelerates like no other gravel bike I’ve ridden. Conversely, as predicted, it suffers when riding downhill on rough terrain. The front end is easily knocked around and it generally doesn’t feel all too confident on steep and rugged descents. But then again, that’s likely not where this bike was intended.

There are a few other things to note about the frame and fork, which is the only way 3T sells the Exploro. We tested the LTD model — black — which weighs in at an incredibly svelte 950g. The design is punctuated by the large tapered down tube, the asymmetric swooping chain stay, 15mm front thru-axle and a 142mm rear with the odd Hang Loose derailleur hanger. The hanger contains the threads of the rear 12mm thru-axle, so when the rear axle is removed the rear derailleur and hanger slide out of the frame as the wheel is removed. Neither here nor there for me, but in practice it does allow a wheel change to be a little more fluid. Simply align the disk rotor, insert the wheel, slide the axle and finally place the derailleur back with the wheel already in place.

The D-shaped ‘Charlie SqAero’ seatpost is the most unique and interesting frame feature. There are essentially two parts to it, both proprietary. The most annoying of which — my biggest gripe with this bike — is the integrated internal wedge clamp, accessible from under the toptube with a 4mm allen key. Overall it does its job, but it’s particularly tricky to access with a mutitool for on the trail adjustment; and it’s not encouraged to use a ball-end hex at the risk of stripping the allen head at the required torque of about 7 or 8nm, which keeps the post from sliding. On the other hand, the head of the post is quite neat. The elastomer-dampening ring which surrounds the Round Rails insert doesn’t look like much in the flesh, but I was surprised how well it tuned out gravel chatter. The Round Rails seat clamp system is also kind of nice and allows for angular fine tuning without the annoyance of the typical two bolt slide clamp.

3T Exploro Review

  • 3T Exploro Seatpost
  • 3T Exploro Seatpost
  • 3T Exploro Seatpost
  • 3T Exploro Seatpost
  • 3T Exploro Seatpost

While Out Bikepacking.

With a name like Exploro, it was only a matter of time before someone would take one out on a multi-day trip. We saw a few decked out in Apidura bags at Interbike, and have gotten wind of a few people using them for weekend exploits. Overall, the 3T felt fine with a light load. On one overnighter it dropped down to 7°F at higher elevations, so I planned accordingly and brought plenty of heavier warm gear. Generally, the Exploro still feels fast even when loaded. Crazy. I will add that this is certainly not a bike for multi-week trips. It has a few faults when it comes to bikepacking. Namely there are only two bottle cages and they don’t play nicely. Typically I’ll use the frame space for a water bottle and a large cage for an Anything Bag. It won’t fit my favorite new cage (the King Manything) as the spacing is off and the loop hits the frame. 3T also left out fork mount bosses as well as under down tube cage mounts.

The Exploro also has full internal cable routing with a modular cap behind the headtube. This gives the bike a very clean look, but also makes mounting a typical top-tube bag a challenge. However, 3T added two bolts on the top tube for a cage or bolt-on bag.

Additionally, I found the frame triangle rather small for a gravel bike, due to the large aero down tube. It wouldn’t fit a Revelate Tangle in sizes medium or large. I used the Oveja Negra Super Wedgie, which is a great bag, but it didn’t quite fit either. A custom frame bag would be ideal, but this would leave you with zero bottle cages. That said, I think the only solution is wither a custom wedge style half frame pack with a single bottle at the seat tube, or a very small half frame pack.

3T Exploro Review

  • 3T Exploro Review
  • 3T Exploro Review

3T Exploro Review

Build Kit

I won’t spend much time on the build kit — or list it — considering that the 3t Exploro is sold as a frame/fork/seatpost combo only. I was impressed with the 1×11 gearing they sent as well as most of the carbon components, barring the non-tubless ready carbon rims.

  • Size tested Large
  • Weight (as ridden) 18 pounds (8.16kg)
  • Claimed Weight (frame) 950g
  • Price (Black LTD) $4,200 USD
  • Contact exploro.3tcycling.com


  • The geometry is dialed for responsive pedaling and insanely fast climbing.
  • Unbelievably lightweight. The carbon frame design makes this one of the lightest gravel bikes on the market.
  • The seatpost clamp’s vibration reduction ring does a noticeable job dampening the effects of long days on gravel.
  • Speed. Did I mention how fast this bike feels?


  • Toe Overlap, especially with the 700c/45mm tires; I assume this would be less impactful with a 27.5 setup.
  • Standard framebags don’t really fit; both the otherwise universal medium Revelate Tangle didn’t fit and the Oveja Negra Super Wedgie was off due to the odd proportions of the triangle.
  • Can’t fit a King Manything. Even with the three-pack bosses on the down tube my new favorite cage won’t fit.
  • No under down tube or fork mount bosses provided for additional water.
  • The seatpost clamp — although nice for tech — is non-standard and very difficult to adjust.

Wrap Up

As noted above, I had a few grievances with the 3T Exploro. Adjusting the seatpost clamp was problematic. The lack of bottle cages are quite annoying, as is the smallish frame triangle. While the toe overlap was my biggest hinderance on singletrack, I would likely fit this bike with 27.5×2.1 tires and that would be a non-issue. And, it’s not cheap.

However, even with these complaints I was really sad to have to return this bike. It’s the fastest bike I’ve ridden, and it became quite addictive. Every time I took it out, I left my driveway like a bat out of hell and ended up doing twice the miles I’d planned. It pushed me to crank up long climbs with gusto and head down a few unknown roads just because I could. I want one just for these types of rides. If you are a gravel rider or racer, or are simply in the market for a fast bike for this type of riding — and the occasional overnight or weekend bikepack — the 3T Exploro might be worth considering. While I’ve never been even remotely tempted, if I were to participate in a big gravel race such as Dirty Kanza, and I could choose any bike for the job, this would likely be it.

  • Mike

    I guess this is what you get when a road company designs an adventure bike.

  • Kurt Schneider

    Nice write up, and a cool looking bike. Aside from the toe overlap, the lack of clearance between the rear tire and seat tube is concerning. (I was initially concerned about the same clearance issue on the Deadwood, but the Alternator dropouts resolved that easily.)

  • Daniel Jackson

    Wondering if you guys have ridden the Open U.P. and might offer a comparison. Particularly interested if the Open has less toe overlap and might offer a bit more stability on the descents.


  • Andi

    Well, I did ride both and I certainly did like the Open more. I can’t remember very well but I think I didn’t have any toe overlap issues – though I did ride the 3T with the WTB Horizon tires (the Open was on 2.1 Schwalbe Racing Ralph) … The Open is a bit less speed oriented and felt a bit more comfortable and offroad capable. The frame triangle definitely offers more space on the Open and it also has a bottle mount under the downtube. It’s a fun bike but personally, I’d rather buy a proper bikepacking bike (there’s light ones like the salsa cutthroat as well) or a proper CX bike .. and given the price on each of those – probably both. Though as a middle ground, I did like the Sequoia very much. A bit heavy but well thought out and fun to ride.

    Cheers, Andi

  • Mark

    What I’m waiting for is a Plus bike combined with a Gravel bike and it could be built with already existing parts. The wheels would be built using aluminum 27.5 x i27mm (i = inner width) Easton Arc rims weighing 475gm which one of the narrowest/lightest aluminum Plus rims available. The rim could also be carbon fiber but would be much more expensive. The tire would be a 27.5 x 2.8in Schwalbe G-One Allround Liteskin weighing 655gm which has a Gravel tread. This would be a very light for a Plus bike wheel/tire combo. Mount this wheel/tire combo to a bike frame like the Salsa Fargo Rival 27.5+ and you would have an incredible Plus/Gravel bike. Now that I have gotten used to the plush Plus tires of my mountain bike, I want my next Gravel bike to have the same soft ride. I now find my current Cross/Gravel bike to be very stiff and jarring. I chose the rim/tire combo above to minimize weight but also to keep it relatively affordable. I bike like this could be even more affordable using an aluminum frame and fork because the soft Plus tire would more than compensate for the stiff aluminum frame and fork. This Plus/Gravel bike would probably also make a pretty good Bikepacking rig!

  • Gerard Vroomen

    Hi Logan, thanks for the review. And you know we can always send it back to you if you miss it too much, also with the 27.5×2.1″ tires!

  • Approved

  • Imraan Ho-Yee

    Gerard, just built your frame up a few weeks ago…i am loving it. It may just be the one bike to do it all (ideally with 4 wheelsets). It is striking in the white colour scheme and is drawing alot of attention here in Cape Town. BRAVO.

  • Person Dude

    Come on, that’s shortsighted comment. As awesome as bikepacking is, few have the time to go on long multi-week journeys between time required for work and other responsibilities. I am one such person, so it makes more sense for me to have a gravel bike that feels fast on day long or shorter rides like the 3T Exploro. And since I prize speed more than the average cyclist (and am more roadie than MTB’er), something like this would be perfect for me.

  • Hmmm. :)

  • Person Dude

    Gerard, massive kudos on engineering this bike and the Open Cycles U.P. I’ve been lusting for a lightweight carbon gravel bike with road bike length chainstays for a long time, and that never existed until you brought these bikes out. They’re literally my definition of a perfect bike.

    They are a bit out of my price range though. Is there any chance that you’ll release a lower priced version of either the 3T or U.P. with the same geometry made of either metal or a lower grade carbon? If so, I’d snatch one up immediately.

  • I think 27.5×2.1″ rubber would alleviate this… sorry for the delay there!!

  • Gerard Vroomen

    It definitely would. ANY other tire would have more clearance and the 27.5×2.1″ tires have more tire clearance than virtually all 35mm+ 700c tires.

  • Gerard Vroomen

    Thanks for the kind words. What you’re asking for is not currently on my plate, and it’s pretty full already.

  • Kurt Schneider

    No worries. I’ve been installing a new drivetrain on the ECR, so there’s always something to do. I appreciate the follow up. Thank you.

  • Person Dude

    I understand, thanks for the reply. One more question, is there any way to get more involved with the XPDTN3 club besides just joining the email list?

  • Gerard Vroomen

    Probably in the future, yes.

  • Josy

    Would like to built up this bike with the new DuraAce. Unfortunately this groupset is flatmount only. Do you have any idea if 3T is planning a flatmount version of the Exploro? I think especially the fork from the U.P.P.E.R would be a great addition.

  • Tony Vander Linden

    Had a hard time choosing between the OPEN U.P. and Exploro. Both are amazing. And although it was hard to write the check, it’s been worth every penny. Love mine. Come join the discussion with other Exploro enthusiasts! http://www.facebook.com/groups/1902647203314741/

  • Ian TheMusette Walton

    Hi Gerard

    I know Marc and Marcel of the XPDTN3 crew and also Christian in Girona who joins them occasionally; a magic philosophy and suitable to more people than a massive adventure (though a massive adventure is something many would dream of as well).

    I just wanted to add my kudos as it were. I took Christian’s Exploro (built 650b with the fabulous Horizons) out in the hills around Girona last evening for a spin and a little photo shoot. It’s the first time I have ridden it and it really was amazing. Possibly the most fun I have had on a bike since the first ride of a new BMX when I was a kid 30 years or so ago. Just put a smile on my face for the whole 3 hours until the sun went down.

    Well done, great – really – great bike.


  • Gerard Vroomen

    Thanks Ian, that’s a common occurrence but I never get tired of hearing it! And that is really what the goal was, just to have fun and make people smile when they ride, we have plenty of time to be serious the rest of our lives.

  • Ian TheMusette Walton

    Totally agree. Keep smiling GV. Thanks.

  • Adam

    I’m looking for a bike to use to ride El Camino de Santiago with my wife next summer. We’ll be bikepacking but staying in hostels and I understand that there are lots of drinking water sources along the way, so don’t need to carry a lot of water with us. The 3T Exploro looks like a decent possibility for this and also considering the OPEN U.P. Any suggestions as to whether these are good choices for an adventure like that?

  • They would be, I think, although more fears toward fast and shorter trips, IMO. The Camino is mostly paved and gravel, I believe. If you want something a little less aggressive, with more long distance comfort, check out the Niner RLT9 steel, the Kona Sutra LTD, or the Salsa Cutthroat. Also, the Bombtrack Hook EXT… and a more budget friendly Surly Straggler.

  • John Mildenberger

    I get mine the end of the month! Spent months evaluating gravel bikes; it’s perfect!

  • Paul Skorupskas

    I would second this. Seems like since the industry is going this way, it might mean that an update makes sense. Maybe something is already in the works?

  • Pascal Girard

    This is actually the type of bike I would want to use to gun down my local country roads and hills. I really like it, but I’d have to sell one of my kidneys to buy it.

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