--- product_id: 217078214 title: "SR Suntour SP12 NCX Spring Seat Post Diameter 31.6 mm Black 2019 Seat Posts" brand: "sr suntour" price: "€ 130.36" currency: EUR in_stock: true reviews_count: 19 url: https://www.desertcart.pt/products/217078214-sr-suntour-sp12-ncx-spring-seat-post-diameter-31-6 store_origin: PT region: Portugal --- # SR Suntour SP12 NCX Spring Seat Post Diameter 31.6 mm Black 2019 Seat Posts **Brand:** sr suntour **Price:** € 130.36 **Availability:** ✅ In Stock ## Quick Answers - **What is this?** SR Suntour SP12 NCX Spring Seat Post Diameter 31.6 mm Black 2019 Seat Posts by sr suntour - **How much does it cost?** € 130.36 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/217078214-sr-suntour-sp12-ncx-spring-seat-post-diameter-31-6) ## Best For - sr suntour enthusiasts ## Why This Product - Trusted sr suntour brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Stanchion tube diameter: 31.6 x 400mm w/25mm setback. Material: alloy. Saddle base width: 43.5mm. Travel: 50mm system: brass bushing parallelogram system compatible: 7mm saddle rails only target category: all road-sport/MTB weight: 826g = 1.82 lbs. Warranty: one year ## Features - Brass bushing parallelogram system - Alloy arms - 50mm travel - Diameters: 27.2mm or 31.6mm. - Length: 350mm. - Colour: Black. - Rider weight: 60-100Kg. - Hard or soft spring optional. ## Images ![SR Suntour SP12 NCX Spring Seat Post Diameter 31.6 mm Black 2019 Seat Posts - Image 1](https://images-na.ssl-images-amazon.com/images/I/31Jlw-y6ssL.jpg) ![SR Suntour SP12 NCX Spring Seat Post Diameter 31.6 mm Black 2019 Seat Posts - Image 2](https://images-na.ssl-images-amazon.com/images/I/81SFE1YN9IL.jpg) ![SR Suntour SP12 NCX Spring Seat Post Diameter 31.6 mm Black 2019 Seat Posts - Image 3](https://images-na.ssl-images-amazon.com/images/I/81c5nAyqhOL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐ Converting a hard tail to soft(er) tail at a reasonable price.... *by D***S on Reviewed in the United Kingdom on 25 August 2018* So, post a bit of a mix up on delivery, the Suntour NCX suspension seat post arrived (Prime next day') quickly and safely. First impressions were good, it appears very solid and well-built, nicely finished with bright white logos and lettering on a matt/satin black finish. One thing I noticed immediately, however, was just how much heavier this seat post is compared to a standard, non-suspension, post. Of course all suspension seat posts are heavier to greater or lesser extent but this one is on the greater side of things - the tough parallelogram design comes at a cost on this account.This aside, the design is visually pleasing, it looks and is robust, and is well finished. The clamp is designed to accommodate 7mm seat rails and secures the seat via two wide flange stainless steel hex bolts either side. Leveling the seat is achieved by loosening these bolts and 'clicking' through notches in the clamp incrementally. Consequently, getting the seat perfectly flat, if that's your thing, can be a little tricky. Otherwise the post dropped cleanly into the seat tube on my Marin hybrid and all was well. One thing to keep in mind here is seat post length. I ordered the 350mm (27.2mm) but there is also a 400mm option available - which may be important if you are tall and on a small frame (I'm not). Also be aware that the parallelogram itself takes up about 3-4 inches of the seat post length so if your present post drops further into the seat tube than this it might be a problem.Another inherent consequence of the parallelogram design is that as the seat compresses, both under the rider's weight and when soaking up bumps, the seat naturally shifts both downwards and backwards. This therefore needs to be kept in mind and accounted for when setting up - the post should be set to ride at the correct height with the rider is seated and the seat itself should be set at the correct distance forward or back under load. This latter adjustment was a potential problem for me as I am short, with a short reach, so I will typically put the seat more forward on the rails in any case. Getting this in the right ball park meant setting the saddle pretty much at the limits on the rear of the rails to get a sufficiently forward position. I don't think this will be a problem for most riders however, I mention these things here because they might be useful to those, like me, that are short of stature, and reach., in which case some compromises may be in order.On a more positive note, I was pleasantly surprised to find that the NCX suspension post comes not just with the possibility of changing the spring for one with a higher or lower rate (stiffness, the standard spring is medium, good for up to 95kg riders apparently) but that the screw that retains the spring in the tube, like some other suspension posts, allows for adjustment of the preload. The one I received had the spring pretty well loaded up (i.e. tightened so as to give quite hard ride) and I had to back it off quite a bit to get to the 'sweet spot' for me. This of course doesn't actually affect the spring rate, only changing out the spring will do this, but it does change where the suspension starts to take notice of the lumps and bumps on the trail so it a useful adjustment to have. This is also useful if you want to control the amount and frequency of the seat shifting in response to trail conditions (given, as above, the action of the parallelogram when functioning).Once, set-up and with a good bit of static trial and error bouncing up and down on the seat to check it was working more or less as intended (e.g. that it hopefully wasn't going to bottom or top out, etc.) it was time to try it out for real!Riding on a mixture of tarmac, dirt, and gravel roads, as well as some woodlands this suspension post really does perform much better than any of straightforward piston type affairs I have used previously - it's in a different class. I eventually found that what worked best for me was to set the preload so that the sag, with my weight actually on the seat, allowed the seat to 'float' around a third of the way down the suspension travel. This way I found it really soaks up a lot the holes and in the roads and rocks off-road without hitting the top stop on return. This might actually a bit too 'bouncy' for some but at this point is a matter of personal choice.What I can say though is that, generally, the NCX exceeded my expectations and it is certainly a good value option if you want life in the saddle to be a bit more comfortable but don't want full suspension or an armchair for a seat. In fact the saddle on my new Marin (stock) is a bit too harsh for me and I was going to change it, I probably still will, but the NCX makes enough difference that it's now more a matter of choice than necessity. Does it work as well as a full suspension bike? of course not, no where near really, but it's a great alternative for softening a down side of hard tails whilst keeping all the benefits. Overall shock absorption is very good for a suspension seat post in this price range, indeed in any price range. Is it worth the money, is it worth the investment? Absolutely.Pros: Cons:1. It works, very well! 1. Heavy (relative to a standard post)2. Good build quality and finish. 2. Could be tricky to set up for some.3. Changeable springs and (therefore) rates. 3. Dust cover not supplied (available separately)4.Well priced against similar products (e.g. 'Thudbuster')In conclusion (and having only had it a very short while) the Suntour NCX suspension seat post has really impressed me. It works better than I thought it would and although it may not be for everyone I found it transformed the ride and feel of my hybrid in a very positive (i.e. comfortable) way. It looks good, soaks up the lumps and bumps, and the price, whilst not cheap, doesn't cause palpitations the way some bike upgrades do these days. The dust cover should come as standard, as should a choice of spring rate, and I'd have liked to have seen finer adjustment available for seat leveling. However, this is a great product, I love it, and happily recommend it. ### ⭐⭐⭐⭐⭐ Makes a Big Difference *by K***L on Reviewed in the United Kingdom on 23 September 2017* Chose this as the Cirrus Bodyfloat cannot possibly be worth more than three times as much, and the cheaper seat posts have rather iffy reviews. Just taken it out in the forest tracks and it made a very noticeable difference. Bike is rigid frame ebike, so although you feel the ruts through the handlebars, you quickly adopt a more relaxed hold, which leaves only the vibes coming through the seat, which are almost eliminated by this seat post. Easy to fit, good instructions (with photos) and no spring adjustment required for my 77kg.One thing to be aware of. If your bike has no crossbar and you use the seat post to clamp it to your workstand, there is less "free post" to clamp to. I had to shorten my clamp with a saw!UPDATE 11/10/17. Just added Ergon GC1 'biocork' handlebar grips to the mix and I think I have almost turned a rigid general purpose bike into a FS MTB!!An exaggeration of course, I wouldn't do MTB DH with this, but I am definitely doing rough trails quicker than I did with the original set-up. I am not talking about bike toughness. I am talking about rider comfort. Which does affect the speed you can do. And the speed affects the exhilaration. In the original post I mentioned the vibes through the handlebars. These Ergon grips spread the shocks over a larger area, so reduce their impact. So you can go faster. ### ⭐⭐⭐⭐ Good isolation but depends upon rider's weight *by D***S on Reviewed in the United Kingdom on 10 July 2019* Nicely designed and manufactured suspension seat post. I purchased this after my previous suspension seatpost (an earlier version of this one) developed too much play in the joints after 5 or 6 years of light use. This version either has a stronger spring or the geometry is slightly different which means, at 70kg, I appear to be at the lower weight limit. I have the spring adjustment set to minimum compression yet it still doesn't feel as 'floaty' as my previous Suntour suspension seatpost - it feels a bit stiffer. I've seen replacement springs available with different compliance ratings (both softer and harder than the, I assume, standard one supplied) so substituting a different rated spring is an option. I find isolation from the road/track surface is still good and there's no play whatsoever in the joints - of which there are many. I understand that replacement joint bearing kits are available for this model. I hope they won't be needed for a few years yet.One thing to watch out for is that this seatpost is very tall and adds considerable height. Some riders may find that, even when the seatpost is set as low as possible into the bicycle's frame, the saddle is still too high. The suspension movement is unusual in that the saddle moves backwards and down in an arc. This means the rider sits slightly further back from the handlebars than normal.EDIT, March 2020: Replaced the supplied spring with the old spring from my previous Suntour SP12 suspension seatpost and this gives me back the isolation I had before. A definite improvement. How much effort would it take for Suntour to state suitable weight ranges in their specs? From my experiences, the spring currently supplied with this NCX seatpost is unsuitable for riders weighing under about 70 - 72kg. If you weigh around 70kg and are using the currently supplied spring, you don't know what you're missing - it can be so much better. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/217078214-sr-suntour-sp12-ncx-spring-seat-post-diameter-31-6](https://www.desertcart.pt/products/217078214-sr-suntour-sp12-ncx-spring-seat-post-diameter-31-6) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-06-22*