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The Discover seatpost from Shimano offshoot Pro is reasonably light, very long and easy to live with. It's just a pity it doesn't actually provide any comfort improvements.
If your bike setup involves a lot of exposed seatpost, then the Pro Discover carbon seatpost might just have your name on it – even if your name's really long. There's space for a lot of Letraset on a 400mm post.
Styled to match Pro's other gravel bike components, the Discover stem and handlebars, the Discover seatpost is fairly light at just 217g for this 400mm x 27.2mm version. As you might expect from those numbers, the main shaft is carbon fibre, as is the inner section of the clamp. There's some super-strong Dyneema fibre in the mix too, an ultra-high-molecular-weight polyethylene we've previously encountered in Specialized shoes, and the Outlier Minimal backpack.
There's 20mm of setback (the distance between the centreline of the shaft and the centre of the clamp) which isn't unusual, but check against whatever you're swapping from, and there's room inside the post for a Di2 battery.
Your saddle is held by a side-fastening clamp, a design that has a chequered history. I've used side-fastening posts that simply would not stay put however hard I tightened them; getting the angles and friction between the surfaces right so the weight of a rider won't move the clamp seems to be less than trivial.
Happily, the Pro Discover carbon seatpost's clamp holds firm even when it has to cope with my current, ahem, lockdown weight (and if you haven't been raiding the fridge 14 times a day since March you have far more willpower than me). There's a catch though: Read The Freaking Manual. Or rather, read the torque recommendation on the clamp.
You have to tighten the saddle rail clamp to 13Nm. That's a surprisingly large amount of oomph to be putting through a 5mm hex if your fingers are used to the 5 or 6Nm that's typical of things like handlebar, stem and seatpost clamps or even the twin bolts of many high-end seatposts. Use a torque wrench, or you'll likely under-tighten it and it'll move.
How do I know this? Because I'm an idiot who hastily assembled a £230 seatpost without a torque wrench, didn't tighten it enough and it slipped. You're now going to take the piss in the comments and, well, fill your boots. I deserve it.
My torque wrench neglect aside, Pro's side-fastening clamp is a lot less fiddly than the saddle clamps on most seatposts. It only requires the normal human complement of hands to assemble it instead of the three that many clamps are designed for. So that's nice.
It's only designed for 7mm round-section rails though, so most carbon fibre rails won't fit.
Pro Bike Gear's tagline for the Discover seatpost is 'smoothing out the roughest rides'. Weeeell, not really. At least not as far as I could detect in normal trail use. It's not unusually stiff, and it may dissipate a bit of buzz, but on a gravel bike the tyres already do that unless you inflate them too hard. It certainly doesn't move under you in a way that you can feel, unlike some comfort-improving seatposts.
Thinking I might simply not have enough exposed to give the Discover seatpost a chance to do its thing, I switched it to the smallest frame I own. That's a hybrid with a 460mm seat tube (bottom bracket centre to top of seat clamp), as opposed to the 505mm of my gravel bike, so there was 225mm of seatpost exposed instead of 180mm, measured to the saddle rails.
For good measure, I whacked an extra 20psi in the tyres too.
Over hard pothole edges I did then seem to be able to pick up a bit of shock-absorbing flex, but there still wasn't much, and certainly not enough to justify the price. It might work better with even more post exposed, but to need that you'd have to be either very tall or riding a frame that's on the small side.
If you don't feel the need for a flexy seatpost, though, the Pro Discover seatpost is a very good piece of kit. With one rather large caveat: the price.
I generally try not to say much about price and value for money. I figure you know your own budget, dear reader, and are smart enough to figure out for yourself if a particular piece's features and capabilities are worth it to you. But there's no going past the fact that this is one of the most expensive seatposts around but doesn't really offer any particularly special qualities to justify its price tag. You can find it online for about £180, but that's still more than the Ritchey WCS Carbon Link Flexlogic. Conversely, you can pick up the Pro Vibe seatpost for under £60. It's very similar to the Discover but made from aluminium, and still decently light at a claimed 234g for a 350mm post.
On the gripping hand, the Canyon S15 VCLS 2.0 CF is expensive at £232.95 but lives up to its cushioning claims and is fairly light. The same goes for the Specialized CG-R post at £185, though they're getting hard to find since Specialized stopped using them on the Roubaix bikes.
Should you buy the Pro Discover seatpost? Yes, if you like its looks, or want a very long, fairly light post and feel the price is reasonable for those features. But you should look elsewhere if you want serious bump-taming abilities.
Generally decent long, light post but the claimed ride-smoothing ability is missing
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road.cc test report
Make and model: Pro Discover Seatpost Carbon
Size tested: 27.2mm 400mm
Tell us what the product is for and who it's aimed at. What do the manufacturers say about it? How does that compare to your own feelings about it?
It's a carbon fibre seatpost with a single-bolt clamp that you get at from the side. The carbon layup is designed to provide a bit of comfort-improving flex. "Smoothing out the roughest rides," says Pro.
At 400mm it's also quite extraordinarily long.
Tell us some more about the technical aspects of the product?
Pro Bike Gear says:
LIGHT & ROBUST CARBON FIBER LAYUP
WITH USE OF DYNEEMA
PERFECT MATCH WITH DI2
SINGLE BOLT CLAMPING
WEIGHT: FROM 205 GRAMS
DIAMETER: 27,2 & 31,6 MM
SETBACK: 20 MM
It's very tidily made.
Holds the saddle firmly, which is the main thing I want a seatpost to do, and if Pro didn't claim comfort enhancement it'd be getting a higher score here, but the ability to"smooth out the roughest ride" seems to be missing in action, and that marks it down.
It's reasonably light, but not amazingly so.
As far as I can tell it's no different from just about any other seatpost.
I hate rating things for value, but there's no going past the fact that for about the same money you can get seatposts that provide the ride-smoothing that's claimed but missing here, and you can get lighter posts for less money if that's your priority. Score it 6/10 if what you really need is a very long seatpost.
Tell us how the product performed overall when used for its designed purpose
Perfectly well, except for the lack of alleged ride-smoothing.
Tell us what you particularly liked about the product
Easy set up, looks good, solid hold on saddle rails.
Tell us what you particularly disliked about the product
Be nice if it actually delivered the claimed smoothness.
How does the price compare to that of similar products in the market, including ones recently tested on road.cc?
Expensive: see main story.
Did you enjoy using the product? Yes, insofar as it's enjoyable to have a saddle that stays where you put it.
Would you consider buying the product? No, I don't need the length and there are better bump-taming posts.
Would you recommend the product to a friend? Only if they needed a really long, robust post. It's a pretty narrow use case.
Use this box to explain your overall score
Curly one this. If Pro hadn't claimed this post was capable of 'smoothing out the roughest rides' it'd be getting 7 for 'good', because it IS a decent seatpost, just a bit expensive. But when a major claim about a product just isn't delivered, and that product is among the most expensive in its category, it's hard to give it more than 5, 'average'.
About the tester
I usually ride: Scapin Style My best bike is:
I've been riding for: Over 20 years I ride: Most days I would class myself as: Expert
I regularly do the following types of riding: commuting, touring, club rides, general fitness riding, mtb,
John has been writing about bikes and cycling for over 30 years since discovering that people were mug enough to pay him for it rather than expecting him to do an honest day's work.
He was heavily involved in the mountain bike boom of the late 1980s as a racer, team manager and race promoter, and that led to writing for Mountain Biking UK magazine shortly after its inception. He got the gig by phoning up the editor and telling him the magazine was rubbish and he could do better. Rather than telling him to get lost, MBUK editor Tym Manley called John’s bluff and the rest is history.
Since then he has worked on MTB Pro magazine and was editor of Maximum Mountain Bike and Australian Mountain Bike magazines, before switching to the web in 2000 to work for CyclingNews.com. Along with road.cc founder Tony Farelly, John was on the launch team for BikeRadar.com and subsequently became editor in chief of Future Publishing’s group of cycling magazines and websites, including Cycling Plus, MBUK, What Mountain Bike and Procycling.
John has also written for Cyclist magazine, edited the BikeMagic website and was founding editor of TotalWomensCycling.com before handing over to someone far more representative of the site's main audience.
He joined road.cc in 2013. He lives in Cambridge where the lack of hills is more than made up for by the headwinds.