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Pembree Releases Updated DBN Seatpost Clamp in 10 Sizes & 8 Colors

Oct 2, 2023 at 4:52

Press Release: Pembree

We have designed and manufactured the DBN seat post clamp specifically for frustrated riders (like us) that were sick of cheap clamps slipping / over-tightening, often resulting in damage to the sensitive internal mechanism of dropper posts. DBN stands for Double Barrel Nut, a reference to the rotating components, that allow the clamp to actuate.

Having launched in 2022, the DBN has become one of our most popular products, continuing the quest to make mountain bike products better in every way and today we are announcing an additional 6 sizes to accommodate nearly all the varying sizes across the market.


Concept: We designed this to offers exceptional and consistent clamping force, ensuring that your seat post remains securely in place, without crushing your dropper post. The Barrel Nuts rotate during clamping, keeping the custom designed bolt perfectly straight; reducing the stress in this area.
Compatibility: The DBN Seat Post Clamp now comes in 10 sizes ranging from 28.6 through to 39.7 and we believe that Pembree has the most choice of any company globally. The size is machined directly onto the clamp body to avoid any mis-sizing situations.
• The DBN is manufactured in PEMBREE’s own factory that is powered entirely on renewable energy.
• The clamp body is machined out of UK-produced 75% recycled aluminium which minimises the carbon footprint
• The DBN can be 100% recycled at the end of its life.
Precision Engineering: the DBN is machined on a Brother 5 axis Mill/ Turn CNC machine and is loaded via an ABB robot. The final bore is turned rather than milled resulting in an incredibly accurate clamp that will fit frames perfectly.
Customisation: Available in all 8 PEMBREE colours to match any bike.


bigquotesThe response to the DBN has been overwhelming, our customers globally appreciate the thought and care that we have taken with the clamp, the attention to detail at every level…including the box! By increasing the number of sizes to 10 means we are producing 80 variations which realistically is only possible when you manufacture the products in house. Our commitment to minimising our carbon footprint continues as always and the DBN looks sweet!”Phil Law, Pembree Founder

bigquotesAs with everything PEMBREE it’s perfect, not over engineered, the attention to detail , even on a seat clamp, is outstanding, British engineering at its best."Rob Warner, MTB Legend

bigquotesThe DBN is a no brainer. It's simple, looks great, is available in lots of colours and sizes, and does the job better than just about anything else. It's become one of our most popular customer upgrades."Dave Williamson, Owner of Bikegoo


Pricing and Availability

• DBN are available now from pembree.com and from PEMBREE Stockists at £29 in the UK
• The DBN comes in 28.6, 30.0, 31.8, 34.9, 35.6, 36.4, 37.0, 38.5, 38.6 and 39.7 sizes and all 8 PEMBREE colours.


PEMBREE’s goal is to become a global leader in ethical, transparent and ecologically sustainable manufacturing within the mountain bike industry. Our premium products are designed and manufactured in our own solar/wind powered factory in East Sussex, England using only recyclable materials.

Author Info:
Pembreeuk avatar

Member since Jan 17, 2020
3 articles
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  • 67 2
 game changing stuff here
  • 14 9
 truly the kind of insightful and relevant, cutting edge reporting that I've come to expect out of PinkBike
  • 4 0
 oh man if you haven't experienced the undeniable and profound performance difference from a bespoke seat collar... just buckle up for that one.
  • 5 0
 @Ralph-Wiggum: they need to make flat pedals and really up the game
  • 2 3
 @Ralph-Wiggum: it’s literally a product press release by Pembree bro.

Name checks out.
  • 1 0
 Hey, if you don't anodise. Ya basic!
  • 18 0
 These look really good! It's shocking to me that Hope hasn't even updated their terrible clamp design with even a single barrel nut.
  • 8 0
 Hope, for a company who can design and manufactuer anything they like, certainly make some odd choices
  • 2 0
 Indeed. Hope be like 'Not our fault, just buy a replacement bolt.'
  • 11 0
 Is this a little overkill? Maybe. Is it a well designed product though? It sure is. Pretty colors are a bonus.
  • 6 0
 Thank you
  • 4 0
 If you have a dropper you should get a simple torque wrench so you don't over tighten, then you can use it on other bolts too! I do like a anno collar, though, but they demand matching spacers and other accessories.
  • 3 0
 This solved my seatpost sticking problem. With the garbage stock seat clamp, If I went loose enough for it to move freely, it would slowly sink into frame or a mild bump would change the angle. The old version worked as advertised for me. Not cheap but does what they say for me.
  • 3 0
 The important question, do you position the clamp bolt towards the front or back? The pic above would indicate it goes in the back, but I've also seen it rotated to the front. I just want to make sure the laughing behind my back isn't because of my seat post clamp.
  • 4 0
 We actually don’t have a preference, however some frame manufacturers do…usually carbon fibre frames. Don’t worry we won’t laugh…
  • 3 0
 A single barrel nut does normally do the job - any testing to confirm it functions better than the normal one?

Pembree make nice stuff but it has to be a slow news day this one ….
  • 5 0
 This clamp has saved me from seat post slippage after exhausting literally every other option. Bravo 2 pembree
  • 3 1
 Pretty, but not well executed. The full top lip on the clamp leads to uneven clamping pressure on the seatpost. Not great for droppers or carbon posts. Look at the elegant BikeYoke seat clamp for an alternative. You don't totally need to bite their style, just add 3-6 large cutouts on the top lip to allow the clamp to more easily conform to the seat tube and provide a more consistent holding force without risking deformation of the seatpost.
  • 2 0
 Why does a lip of uniform size prevent equal clamping?

Torque won’t be high enough to localise the clamping force to that area, it’s still going to spread evenly around the clamping surface.
  • 1 0
 I've been trying to buy one of these clamps but they don't seem to be in stock anywhere locally in the size I need. Emailed Pembree a couple of times but they never respond. The second time I emailed I got some cryptic auto-reply saying "Due to the structure of PEMBREE please expect a short delay to our reply." Eh? The 'structure? Never a good sign when a company doesn´t reply to sales inquiries.
  • 1 0
 Morning, sorry for missing your message. “The Structure” refers to a small team doing everything. We design, test, manufacture and distribute everything ourselves and with only a few people this can be tricky and sometimes we make mistakes. We are human after all!! If you get in touch at hello@pembree.com I will look for your message. Sorry once again. Cheers Phil
  • 2 1
 There really is no need to produce a 38.5 and a 38.6mm clamp - a layer of paint or allowable tolerance between frames would be much more. Just make a 38.55mm clamp and call it done.
  • 9 2
 you know thats not the way we do things :-) but i certainly get your point
  • 1 0
 when you say - "factory that is powered entirely on renewable energy" what energy type are you referring to? Cuz Solar is one thing, Natural Gas or Bio fuel is totally different story
  • 4 0
 Our factory is powered through Ecotricity. So only wind and solar power is used. They are pioneers in the UK!
  • 2 0
 @Pembreeuk: sweet, I am not disappointed Big Grin
  • 3 0
 TIL there are 10+ seat post diameter standards
  • 3 0
 Phil's a really nice bloke, who really knows what he's doing.
  • 1 0
 HOW MUCH?, I appreciate it's machined perfectly round but the same can't be said for the seattubes of most frames on the market.
  • 2 0
 Do you guys do silver? love the look! Probably will buy a pink one soon!
  • 1 0
 Certainly do
  • 2 0
 I've got a pink one and matching stem. And they match the pink hydras perfectly
  • 2 0
 Wonder what it will cost to ship to the US?
  • 8 4
 just go for Wolftooth. Made in USA.
  • 1 1
 @mtnliving247: They dont make 39.7 clamps, my Slash has a beefy seat tube
  • 3 0
 @mcwag23: we do!
  • 4 1
 @mcwag23: We just started making 39.7 a few weeks back.
  • 1 0
 It's not over-engineered? Then what would it it take to over-engineer a seat post clamp?
  • 6 0
 A built in bottle opener or a built in button that books your Reverb in at your local Rockshox service center would both be verging on over engineering.
  • 2 0
 @dingus: Strong disagree. Both of those would be quite useful, and since they don't (shouldn't) effect the actual clamping part of the clamp, wouldn't be a factor in the engineering level of the clamp, just some nice value-adds.
  • 3 0
 @dingus: That Reverb button had better be over-engineered or it's gonna wear out pretty quick.
  • 2 1
 I have some ideas Smile

Smart Clamp: Embed sensors that connect to an app, allowing riders to monitor clamp pressure and receive notifications when adjustments are needed.

Climate Adaptation: Integrate a system that automatically adjusts the clamp's tension based on weather conditions, ensuring optimal grip in varying temperatures and humidity.

Biometric Unlock: Implement a fingerprint or facial recognition system that unlocks the clamp, ensuring that only the bike owner can adjust the seat height.

Self-healing Material: Construct the clamp from a self-healing alloy that repairs minor scratches or dents by itself over time.

Nanotech Coating: Apply a nanotech coating that repels dirt, water, and grease, ensuring the clamp remains pristine and operates smoothly at all times.

Holographic Size Display: Incorporate a mini holographic projector that displays the size and tension setting of the clamp when prompted, making adjustments a futuristic experience.

Voice-activated Adjustments: Enable the clamp to adjust the seat height using voice commands, paired with an AI assistant that can engage in conversations about optimal seat positioning.

Solar-powered LED Lighting: Add decorative LED lights powered by integrated solar panels, providing illumination and added safety during nighttime rides.

Anti-theft Alarm System: Incorporate a discreet alarm that sounds if someone attempts to tamper with the clamp without authorization, discouraging potential thieves.

Mood-responsive Color Change: Embed the clamp with thermochromic or photochromic material, allowing it to change color based on the rider's mood or the surrounding environment.
  • 3 0
 @dingus: we will get in touch with SRAM !!
  • 4 0
 @swampdonkeyuk: we might borrow some of those ideas!!
  • 1 0
 ICan makes a similar design…..out of carbon.
  • 1 0
 @Pembreeuk It's probably me and I'm sorry, but I can't seem to find Canada as a shipping option on your website.
  • 2 0
 We are distributed in Canada through Orange Sport Supply. They have a comprehensive dealer network who can hook you up!
  • 1 0
 DO you guys have a US distributor yet? You don't sell the Turbo Levo size here.
  • 1 0
 We are distributed by BTI in the US and we make the 38.6 clamp.
  • 3 2
 Yup.. its a seatpost clamp made of aluminum.
  • 1 0
 Sweet, a seatpost clamp with 2 pivots and every seatpost size imaginable!
  • 1 0
 Looks very nice. Let me know when there is a quick release version.
  • 3 2
 Wow, I'm so excited ...
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