Prologo Proximus Altius saddle on test – comfort and grip for your trail eMTB?

In the world of eMTBs, the motor, suspension and brakes command the headlines. The saddle tends to go unnoticed, present on every ride yet rarely a topic of conversation until something goes wrong. With the Proximus Altius, Prologo aim to bring it into focus, promising greater comfort and better support on climbs for the demands of e-MTB riding specifically. We put that promise to the test.

Being a saddle is a thankless business. It bears the weight of every rider, absorbs the punishment of every trail and receives little acknowledgement when it does its job well. A saddle only tends to get noticed when it fails, and failure comes in one of three forms: exceptional performance, persistent irritation, or outright pain. That pain, moreover, is rarely confined to the obvious contact points. A poorly suited saddle can send discomfort radiating through the hands, knees, feet and lower back, a consequence of the body’s inherent complexity. Riders who have spent months chasing a solution through stem height, cleat position and saddle tilt will recognise the frustration, only to discover, finally, that the saddle itself was the culprit.

With the Proxim Altius, Italian manufacturer Prologo aim to tackle two key areas: comfort and features. The saddle is designed for riders who take on technical climbs aboard their e-MTB and want to maintain both support and proper ergonomics. A saddle specifically for e-MTBs? That idea may well have come from the marketing department. After all, eMTB is where the buzz is right now. But it is also true that many riders are tackling steeper, more demanding climbs on an e-MTB than they would on a motorless bike. That’s exactly where the Prologo Proxim Altius comes into play.

Before we go any further, a quick disclaimer. Whether we find a saddle comfortable or not may have no bearing on your experience. Few components depend as heavily on personal preference and individual anatomy as the saddle. So the golden rule applies: try it, try it, and try it again.

The Proximus Altius comes in a single width of 155 mm, with a length of 225 mm that sits comfortably within the average range. Our test saddle runs Tirox rails, weighs a claimed 216 g and retails at €99. Those after a more accessible option can opt for the Re-Steel variant at €69, which substitutes recycled steel rails and adds roughly 60 g, hardly a concern in the context of an e-MTB. Colour choice is refreshingly uncomplicated: black, and black alone.

The Prologo Proxim Altius saddle: wide at the front, hollow in the middle, raised at the rear. What is this eMTB saddle actually capable of?

The Prologo Proxim Altius immediately stands out with its distinctive shape. It looks fairly broad, features a central recess and has a pronounced ramp at the rear. Viewed from above, you can also see that the side flanks extend quite far down. Another detail that catches the eye straight away is the cover material, which is very smooth and has a slight sheen in daylight. Running around the rear edge is a striped pattern that is barely noticeable to the touch. Whether it genuinely adds grip or is simply a design feature soon becomes clear out on the trail.

Two things become apparent the moment you sit on the Proximus Altius. The pronounced ramp at the rear gives the saddle a markedly different feel from a conventional design, and that distinctive geometry demands correspondingly precise setup. Our tester Patrick typically rides an SQlab 612, a relatively flat and generously proportioned saddle where small positional deviations, horizontal or vertical, have little practical consequence. The Prologo invites no such latitude. Even minor adjustments shift the feel considerably: drop the nose too far and you find yourself sliding forward; push the saddle too far forward and the raised rear section begins to interfere.

Take the time to set the Proximus Altius up properly for your anatomy and riding style, however, and the comfort on offer is genuinely impressive. That’s also when the central relief channel earns its place, reducing pressure on the perineal area with quiet effectiveness. Unlike many saddles in this category, the Prologo forgoes a full cut-out in favour of a channel that remains closed at both ends, keeping water and debris from passing through. It is a considered solution. That said, the fundamental rule of saddle fit still applies: if the shape does not suit you, no amount of clever engineering will compensate.

The Prologo Proxim Altius saddle: does a ramp in the saddle help you get up the ramp?

Once you have found the right setup, the Prologo Proxim Altius does exactly what you want a saddle to do: it disappears beneath you. Some riders may take issue with the very smooth cover material, which can make you slide around more depending on the shorts you are wearing. That is highly subjective, though. There will certainly be riders who prefer exactly that. Our tester Patrick normally rides a fairly grippy saddle, so the difference stood out to him quite clearly. Still, we would not hold that against the saddle at all.

Where the Prologo Proxim Altius really shines is on the climbs. The rear ramp resists the natural tendency to slip backwards on steep and technical terrain, keeping you better positioned for longer. . And this is also where the smooth surface starts to show its strengths. Even while seated, the bike is easy to steer and you can shift your body weight with precision. On a saddle with a rougher surface, you would have to work against more friction. Here, by contrast, the bike almost seems to move freely beneath you. To make sure that does not come at the expense of control, this eMTB saddle features deeply dropped flanks on both sides, allowing you to build pressure with the insides of your thighs and quickly lean the bike in the direction you want.

After months of regular use, our tester Bene has developed a clear appreciation for the Proximus Altius, and for the raised rear section in particular. That the single available width happens to suit him perfectly is, admittedly, a matter of individual fortune. The climbing support the elevated rear provides, and the additional pedalling power it unlocks, is anything but.

We also liked the generous rail adjustment range, which allows you to fine-tune the Prologo Proxim Altius MTB saddle with great precision in the horizontal plane. What really surprised us, though, was just how durable this comparatively affordable saddle proved to be. Even after a year in all sorts of conditions, the Prologo Proxim Altius still looks almost as good as new. Signs of wear and scratches are virtually impossible to spot without a magnifying glass. Top stuff.

Conclusions about the Prologo Proxim Altius Saddle

A raised rear section on a saddle: is it a genuine advantage or a solution in search of a problem? On the evidence of the Proximus Altius, firmly the former. Riders for whom the single 155 mm width is a match will find a comfortable, highly durable saddle that earns its reputation most emphatically on the climbs. The elevated rear keeps the rider anchored on steep ascents, and that support can prove decisive, spelling the difference between clearing a technical section seated and losing rear-wheel traction by being forced out of the saddle. Our verdict is unambiguous. One request for Prologo, however: the range would benefit considerably from one or two additional width options.