Recently bought an almost complete Specialized Hardrock Sport. The Ritchey and Zipp ones below can be bought on Amazon or eBay – click the links to go to their product pages. First safe bet is inserting seatpost at least 150 mm inside the seat tube. That is: to keep a minimal length of the seatpost inserted into the seat tube. You can also subscribe without commenting. Cane Creek Thudbuster (ST) Type: Elastomer Suspension Seatpost. It will not stay firmly in place – dropping deeper, or twisting (this is the least of the problems and it happens most rarely, the other problems are more serious). Hi, I have a Cinelli via Folli seatpost and the minimum insertion length marked on it by Cinelli only leaves 70mm in the frame. The top part of the seat tube (the frame) could break. $309.00. Compare; Cervelo R5 Seatpost - 25mm Offset. Of course Shimano make one too, the PRO Di2 battery seatpost holder. Specialized designed this seatpost to deliver comfort, control and efficiency without the drag of extra grams weighing you down. Ending Tuesday at 8:48PM GMT. Respect the recommendations of the seatpost and/or frame manufacturers, if they are provided. Its innovative engineering allows for 18mm of vertical compliance, and Zertz vibration dampening means you'll be that much more comfortable on your ride. Specialized S-Works SL full carbon seatpost 27.2x350 fits SL3 or SL4 Check out Specialized S-Works SL Carbon two bolts seatpost. In other words: for me it is understood that if not advised otherwise, one should follow the given manufacturer recommendations, when they are available. Pull the current seat post out. Also please note 25 mm is 1″. If it is – I’d look for a longer seat post, just in case. £9.99 postage. – Riding terrain (of road, or paved roads). Take a look at all the different sizes we have available, from the 27.2mm seatposts to the 31.6mm seatpost. Comment for robotsPlease empty this comment field to prove you're human. Reckon that should be ok? This means the seatpost will probably not fit firmly enough to stay in place inside a seat tube meant for 31.6 mm wide seatposts. Specialized. Bottom line: if the frame is not precious (either in terms of cots, or, more importantly, sentimental value), I’d give it a go. $35.34 shipping. To avoid anyone having any problems, I have added something I had considered to go without saying, but think it should be explicitly noted, to be on the safe side: When it comes to premium quality there are none that can rival the quality of SWorks. Older French frames use 28 mm seat posts, and older American style bicycle frames use a 1-inch seat post, according to Sheldon Brown, a bicycle mechanic and writer. UPANBIKE Aluminum Alloy Bike Seat Post Length 350mm30.8mm Black for Mountain Bike Fixed Gear Bike Seatpost Four Sizes for You to Choose 4.5 out of 5 stars 1,167 $12.99 $ 12 . Notify me of followup comments via e-mail. This improvement/correction, like many others on the website, was made thanks to the good quality feedback: people taking the time to note the things that aren’t explained well enough (or are incorrectly noted). 350mm x 0mm Offset. Seatpost not inserted deep enough poses a risk to damage either frame, or the seatpost (whichever gives first). That is explained in the next chapter. Shop now. Minimum seatpost insertion depth. View Details. Fox Suspension 2021 Transfer Factory Kashima Dropper Seatpost (Black) (Internal Routing) (Lever Not Included) Not yet reviewed. , Website#z32d1350f487c26512f4f189{display:none}. The size is usually stamped at the end of the post. Looking to get a seatpost for it. As far as I'm concerned a Di2 seatpost battery holder is the only real option. Specialized S-Works FACT Carbon Seat Post - 27.2mm x 400mm x Zero Layback. Choosing between an in-line post, and one with layback, can be a quick way of subtly changing the riding position on your bike. What happens if it is exceeded is explained in the next chapter. A seatpost shim is a hollow aluminium ring that allows to use a specific-diameter seatpost in a frame that is nominally too big for it. Decked out in performance-focused components at every level, the new Rockhopper fits right in at any occasion. Specialized Seatposts. 99 That is explained in Setting up comfortable cycling position. One stop shop for all things from your favorite brand. On a steel road bike, with a horizontal top tube (so connected to the seat tube at a very high point, near the end of the seat tube), where the seatpost is not likely to protrude much (since the frame is designed to match rider’s height, unlike the modern design where they just put the top-tube across, and see where it ends up ) – I would expect it to be fine. The size is usually stamped at the end of the post. Diameters: 25.4, … Find many great new & used options and get the best deals for Specialized Shiv Post Satin Carbon at th… The seatpost wedge bolt may be adjusted with either a 4mm hex or an 8mm socket. Come join the discussion about bike parts, components, deals, performance, modifications, classifieds, trails, troubleshooting, maintenance, and more! You May Also Like. – Seat post strength. Update on the 20th of July 2020: Aesthetic and smooth seatpost for arduous rides 4 4 out of 5 stars from 16 reviews 5 16 (16) Compare; Specialized Shiv Disc Carbon Forward Offset Seatpost. – Frame material and strength in the seatpost clamping section. For “men” frames, with (more, or less) horizontal top tube, minimal insertion depth can be shorter than 150 mm, and is defined by the following two conditions: a) Seatpost should end at least 25 millimeters below the lower part of the horizontal tube weld to the seat tube.b) Total inserted length should be at least 90 mm from the top end of the seat tube. – Frame design (how high is the point where the top tube is connected to the seat tube). This has … Specialized S-Works Venge Carbon Seatpost. We also stock a range of clamps and spares for lost and damaged parts. $29.00. Though I can see why in this case that was a bit confusing, so added the two paragraphs above to avoid any misunderstanding. Bicycle seat post diameter on British or Italian bike frames is typically around 1 1/8 inches in diameter, or 28.6 mm. Air-sprung RockShox forks, tubeless-ready rims and tires, and 1x drivetrains on the Expert and Elite will certainly turn heads, while powerful disc brakes and a whole host of dependable Shimano bits across the entire line will always be in fashion. DRESSED FOR SUCCESS. I have a '98 Stumpy and on '08 Stumpy FSR and they're both 30.9. Source: www.bikecad.ca Picture 3. Still, when setting up the riding position, attention must be payed to not move the seatpost too much out for it’s length. The insertion limit depends on various things, such as: Specialized Pave carbon seatpost with Zertz dampener 27.2 diameter (350mm) Specialized Pro SL Carbon Zertz Seatpost Condition: Great. Travel: 50mm. Adjusting saddle height. 300mm x 0mm Offset. I want to say yes, because that's all I've seen on the Spech, at least the last 2 years model of Mtb. A new seat post wedge is used for the Roubaix, S199900021.The seatpost wedge is positioned inside the frame and is accessed by removing a rubber boot, S199900095. Retül can help you estimate your Roubaix bike size and saddle height here. The right size bike for your body size is essential to ensure the optimum experience, comfort and enjoyment as you ride. Therefore, seatpost would have to be inserted for total of 105 mm in this case (80 + 25 mm). With sizing varying between the type of bike and even the model, we’ve compiled a handy guide for Specialized Bikes to help you get the correct size… Always measure! 30.9mm x 400mm/ 10mm Offset. SPECIALIZED SWORKS CARBON SEATPOST TOP TIER CARBON FIBER SEATPOST A seatpost is a great way to lighten up a ride. The adjustment fastener features a 4mm inside hex and a 8mm outside hex, which reduces the potential for failure due to a stripped head. I would feel safer placing the seat tube at least 25 mm (1″) below the lower end of the top-tube – seat-tube junction. 300mm x 20mm Offset. Same goes if the lowest part of the weld is at 80 mm for example. 27 watching. With a disclaimer: picture 3 of this article shows the “safe bet.” Slide {current_page} of {total_pages} - You May Also Like. I have a "99" Spec. Is 30.9 mm a size that is common amongst Specialized bikes? Seatposts are made in lengths from 75 to 430 millimeters. This site is protected by reCAPTCHA and the Google, Guest posts, linking, and advertising policy, Headsets [01] Names of fork and headset parts, Headsets [02] Important fork, head tube and headset dimensions, Bicycle shifter, brake cable, and housing standards. This post will explain minimal seatpost length. That means itll be smoother over the rougher terrain. $300.00. (a=>{let b=document.getElementById(a.i),c=document.getElementById(a.w);b&&c&&(b.value="",c.style.display="none")})({"w":"z32d1350f487c26512f4","i":"z32d1350f487c2"}); Save my name, email, and website in this browser for the next time I comment. The new S-Works Pave Seat Post uses Tarmac SL6 Di2 battery mount, S186800006. For reasons explained at the start of the (now edited) article’s 2nd chapter. Safest bet, of course, is following the frame (and seatpost) manufacturers’ recommendations. Are we sitting comfortably? For metal seatposts in a metal frame, use an anti seize mounting paste (“copper grease” or similar – Amazon affiliate link). Follow the frame and/or seatpost manufacturer recommendations – if they are provided. $150.00. Exceptions (when to not follow manufacturer recommendations)? Make a big difference to the way your bike feels with one of these high quality Specialized seatposts. Clicking on the link and image below leads to the Amazon on-line shopping. Compare; Thomson Dropper Seatpost. – Total seat post height. Carbon fiber seatposts are also a great way to increase the compliance of a bike. 27.2mm x 300mm. $180.00. $450.00. Colour me conservative. Specialized CG-R seatpost review. Both of these conditions must be fulfilled. $180.00. All the major brands make these, both in the 27.2 mm and 31.6 mm sizes. As an Amazon Associate I earn from qualifying purchases. FSR, the post on this is 30.9. We also added tire clearance up to 30mm, which translates to a 28mm Turbo Cotton on a Roval C 38 Disc wheel. Price and other details may vary based on size and color Amazon's Choicefor specialized seatpost clamp ODIER Bike Bicycle Quick Release SeatPost Clamp 34.9mm 31.8mm MTB Bike Road Bike Casual Bike Seatpost Clamp 4.5 out of 5 stars575 That's why we designed a seatpost that builds compliance into the upper 120mm where clamping doesn't happen, dropped the seatstays, and altered the seat tube shape. It’s going to be fitted to a vintage steel road bike frame with a horizontal top tube etc. Compare; Cervelo Carbon Seatpost - 25mm Offset. For a better experience, please enable JavaScript in your browser before proceeding. PNW Components Puget 2x MTB Lever (Black) Not yet reviewed. For example, using the appropriate shim on a 27.2mm diameter seatpost will enable it to be used in a frame with a … Seatpost: S-Works FACT carbon with Zertz insert, 27.2mm: Saddle: Body Geometry Toupe Team with hollow Ti rails: Rims: Roval Rapide SL 45: Rear Tyre Size… 1d 20h. 27.2mm x 400mm/ 0mm Offset. Disclaimer 2: cycling industry engineering is not what I’d call good engineering. A seatpost can relatively easily be cut shorter, but a too short seatpost can’t be lengthened, of course. It will prevent seatpost from welding to the frame over time and getting stuck. SEATPOST 2021 S-Works Tarmac Carbon seat post GROUPSET SRAM Force eTap AXS hydro disc, 1x, 10-36 cassette, with power meter (front chainring size TBC) WHEELS Roval Rapide CLX, 51mm front, 60mm rear But like the previous posts, it's most likely a 30.9. – In all of my articles, I usually explicitly note only in case manufacturer recommendations can be disregarded (noting the exact case/situation). Inserting seatpost 90 mm deep would not fulfill the a) requirement of seatpost ending at least 25 mm below the weld. When giving such recommendations, manufacturers take into the account the strength of the material(s) used, wall thickness, as well as the total seatpost length (which is effectively the length of the lever over which the rider weight puts the load) etc. Shortening seatposts is very popular with road bikes, for weight reduction. There is one exception, that will now be explained. So their recommendations may be “stricter”, or “less strict” than what is written here below. Thanks for your advice, feel happier with the amount of insertion I have. JavaScript is disabled. $131.56. Seatpost not inserted deep enough into the seat tube (as explained in chapter 2.) I will give myself the liberty to say that I disregard manufacturer recommendations when they recommend more shallow insertion, than what is advised in this article. I'm not sure of what year the frame is, but I can tell you that it is disc brake specific, and silver in colour with black lettering. VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. Is it safe to go shorter than that? Compare; It is 27.2mm diameter x 350mm length. 27.2mm x 360mm. Saddle height is adjusted by sliding the seatpost further in/out of the frame (seat tube). £11.49. Specialized Carbon Seatpost 27.2mm diameter 400mm length. To avoid any injury, or equipment damage, I prefer to consciously “err” on the side of caution. can cause the following problems: Most of these problems can be hazardous if they happen when riding at high speeds and/or on bumpy terrain. The minimum safe margin was explained in this chapter. It is shown in picture 2. As a result, a larger seatpost size is often a sign of a higher-quality bicycle. How long is that? 350mm x 25mm Offset. At 300mm in length, the Enve seatpost is available in 0mm, and 25mm offset versions. For carbon seatposts and frames, a special carbon mounting paste should be used: Related post – How to choose a correct bicycle frame size: If the frame is made of carbon fiber would 90 mm insertion be enough when the top of the seat stay junction is at 90 mm from the top of the seat tube. It can be seen from picture 2 that the seatpost is marked as 31.6 mm wide (and 410 mm long), while it really measures only 31.42 mm. With normal marks from installing as well as a few other tiny marks above the current seat clamp mark Weight: 220 grams Size: 27.2mm X 350mm. When inserting a seatpost, always grease it with proper mounting paste. Both of these conditions must be fulfilled.If, for example, lowest part of the top tube weld ends 50 mm below the seat tube top, inserting seatpost 25 mm below it won’t fulfill the requirement b) – of minimum 90 mm total insertion depth (seat post would be inserted 50 + 25 mm – so only 75 mm). I find such feedback invaluable and wish to thank everyone who has contributed over the past years – so this can become better and more useful for everyone. – Rider’s weight. While quite a few carbon posts see a metal clamp head bonded on … For example, a 27.2mm seatpost (a size commonly found on road bikes) fits inside a 28.6mm diameter seat tube, so it’s a 28.6mm clamp you need. We stock a range of ultra-lightweight carbon rigid seatposts as well as adjustable options, so you can get the precise fit for your needs. It feels a very solid seatpost and is made of thick forged aluminium 6061 T6. A post explaining seatpost width (diameter): Seatpost diameter sizing standards. Most bike shops have a set of seatpost gauges just for this purpose, they most likely won't even charge you for the service if you buy the post from them, maybe a couple of bucks otherwise. A forum community dedicated to Mountain Bike owners and enthusiasts. If, for example, lowest part of the top tube weld ends 50 mm below the seat tube top, inserting seatpost 25 mm below it won’t fulfill the requirement b) – of minimum 90 mm total insertion depth (seat post would be inserted 50 + 25 mm – so only 75 mm). Saddle height depends on how high from the pedals the rider wants to sit. Size. Over the years, I’ve learned to take it as more of a guideline (and warranty protection) than gospel. Even if it costs a couple of bucks and it just confirms your guess, it's better than ordering one and then being surprised when it turns out to be the wrong size. This will securely hold on practically any bicycle. 3 bids. To adjust the saddle height, begin by moving the rubber grommet up the seatpost to expose the seatpost wedge bolt. Our rating . And having it inserted at least 90 mm – both conditions fulfilled.