Prologo Proxim W660 Saddle on Test – The Italian Benchmark for Gravity Saddles?

Brakes, pedals, suspension – all in the spotlight. The saddle? Usually it’s like the middle child in the bike family: ignored until it gets annoying. But what if your saddle suddenly stands out in a good way? That’s exactly what Prologo aim to prove with the Proxim W660 – and we’ve tested whether the Italian middle child is ready for the spotlight.

After reviewing the Proxim Nembo SC from Prologo earlier this year, it’s now time for the newest family member. With the Proxim W660, Prologo claim to have created a saddle that wins hearts both upand downhill.

Compared to the Nembo SC, the W660 is claimed to offer increased comfort on climbs. Weighing in at 235 grams – in the 145 mm version with Tirox rails – the W660 positions itself on the lighter side of the gravity saddle spectrum. Within its own family, it’s only 15 grams heavier than the Nembo. Priced at € 119, the W660 competes directly with comparable models from brands like SQlab, Ergon, and Fizik. With an attractive price point, low weight, and Prologo’s expertise in saddle design, the W660 aims to set a new benchmark in the gravity segment.

Details on the Prologo Proxim W660 MTB Saddle

The W660 is available in two widths: 145 mm and 155 mm. The Italian brand promises that the wider version, with its generous seating area and additional padding, will offer more comfort for riders with broader pelvises. It’s also recommended for those who struggle with weight distribution on narrower saddles. The 145 mm version has a narrower platform and less padding.

Regardless of width, the saddle features a semi-rounded shape with a short nose. This is designed to be just long enough for knee control on descents without getting in the way. In profile, the W660 is flat, with a downward-sloping nose to relieve pressure when climbing. The wide central relief channel – called the “Perineal Area System” (PAS) by the manufacturer – is intended to reduce pressure on soft tissue and prevent numbness.

Prologo highlight their in-house Multi-Sector System as a key feature. The saddle surface is divided into zones, each with independent padding cells designed to deform separately for optimal responsiveness to movement. You can choose between lightweight Tirox rails (an aluminum-steel alloy) or the more affordable Re-Steel rails made from standard steel. The Re-Steel model sells for € 89 and is around 50 grams heavier than the Tirox version in the same width – not a bad deal! This lets you choose the right version based on budget and weight preferences.

There’s less variety when it comes to aesthetics: the W660 sports a distinctive design that clearly sets it apart from the traditionally black saddles of many competitors. However, this can make it harder to match with your bike’s look. Riders who prefer a more discrete look might be put off – a classic black version would be a welcome addition.

The Prologo Proxim W660 MTB Saddle on Test

As soon as we sat on our 145 mm test model, one thing became clear: the W660 is no sofa, and like the Nembo SC, leans toward the firmer side. This reflects Prologo’s heritage in the drop-bar segment.

Despite its firmness, the saddle performs well thanks to its successful shaping. The extra-long rails provide plenty of adjustment range for positioning the saddle far forward or backward depending on preference – very cool!

Heading into the first climbs, it’s easy to find a fairly comfortable and efficient pedalling position. Even on steep, technical climbs, we had no issues with annoying loss of grip. The central relief channel was just right for our testers and reliably prevented numbness. However, the firm padding became noticeably uncomfortable after some time. On shorter rides, the W660 is comfortable enough, but for rides over 1–2 hours, we’d prefer a softer saddle. Endurance riders with more natural padding – or those using a bib – might find the W660 provides a consistently stable riding experience.

Once the climbing is done, the W660 also delivers a solid performance downhill. The seating area isn’t too wide, and the short nose is well-shaped for applying pressure with your knees in corners. It never gets in the way or poses a risk of catching on your shorts.

Conclusions about the Prologo Proxim W660 MTB Saddle

The Prologo Proxim W660 proved to be a capable saddle during this test, though there’s room for improvement. On descents, It consistently supports control without being obtrusive in shape or size . On the climbs, it’s not the most comfortable – the padding is too firm for longer rides. On shorter rides, efficient and fairly comfortable pedaling is possible without causing numbness. What we didn’t like: Prologo offers only one – far from subtle – design. On the plus side, the slide-control surface provided excellent grip while pedaling.

For more information, visit Prologo’s website.

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Words: Ben Arlom Photos: Peter Walker