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Serfas RX-921L Road/MTB Comfort RX Saddle - Men's

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$64.95

$ 31 .99 $31.99

In Stock

About this item

  • Ride Longer, Feel Better - Tired of sore rides? This saddle’s gel padding and ergonomic design erase pain and numbness, even on long trips. It molds to your body and absorbs shocks so that you can focus on the ride—not the discomfort. Whether cruising around or hitting the trails, it’s the comfiest seat you’ll ever own.
  • Protect Your Health - Keep your sensitive areas safe! The pressure-free center channel boosts blood flow, prevents numbness, and stops chafing dead in its tracks. Better airflow means you stay calm and irritation-free during rides of any intensity. This isn’t just a saddle—it’s your key to cycling pain-free for years.
  • Fits Every Ride and Style - Casual cruise, spin class, or mountain adventure—this saddle adapts perfectly. Upright or leaning forward keeps you stable and comfortable no matter how or where you ride. Whether you're hitting the gym or the open road, it’s a saddle that works as hard as you do.
  • No Extra Gear Needed - Ditch the padded shorts! This saddle’s gel tech delivers all the cushioning you need—no extra gear, no hassle. Hop on in your regular clothes and enjoy a plush, pain-free ride every time. Why complicate things? This saddle makes cycling simple, easy, and incredibly comfortable.
  • Built to Last, Made to Perform - Stylish, rugged, and reliable—this saddle does everything. It's ready for anything, waterproof, durable, and packed with advanced features like twin-bar flex and dual-density support. Whether you’re a weekend warrior or a daily commuter, this saddle is built to elevate every ride and keep you going for miles.



From the manufacturer

Serfas RX Saddle - Protecting your junk since 1998

Serfas' RX saddles have a full length anatomical groove down the middle of the saddle along with an elevated seat position. This has proven to eliminate pressure & significantly reduce numbness around your soft tissue (plumbing) & put weight where it belongs—around your sit bones. This means you can spend more time in the saddle without sacrificing comfort.

A difference you can see and feel

This is a pressure map of a Traditional Saddle on the left and the Serfas RX Saddle on the right. The red color indicates the areas with the highest pressure. Notice how the Serfas RX Saddle distributes the pressure evenly to your sit bones, while the traditional saddle has the most pressure in the middle, directly on your sensitive soft tissues.

Pressure Eliminating Channel

A complete anatomic channel maximizes blood flow through the neurovascular bundle for reduced numbness & discomfort.

I.C.S. Infinite Comfort System

I.C.S. mates four unique layers of closed cell foams, gel & microfiber covers to give you the support where you need it & the comfort where you want it for sustained riding.

Dual Density Base

A soft, flexible rubber-like material lies in the saddle’s base to ensure your sit bones never hit a hard spot. Saddle halves rotate independently with rider to reduce saddle friction & irritation.

Zero Friction Gel Infused Padding

Gel infused foam optimizes saddle comfort & support while reducing saddle friction & chaffing.

Pressure Reducing Two Step System

A raised tall end of the saddle removes pressure from you neurovascular bundle while maintaining the nose of the saddle for riding stability.

Serfas : All Riders Welcome

Wherever your road leads we know cyclists seek the ultimate ride. With that in mind, Serfas strives to make products that reflect those wants and needs. Bringing Cycling To Life for over 24 years, Serfas’ commitment to quality, performance, and customer service is reflected in our innovative products that are rider-tested and rider approved.

From our latest E-Lume light technology to our plethora of comfort and performance saddles, Serfas has something for everyone. Come take your next journey with us. We guarantee you’ll love the results.


Bernard Leaney
Reviewed in Canada on May 17, 2024
Easy install. Soft and perfect if you have tail bone issues when riding
Mr J
Reviewed in the United Kingdom on January 31, 2024
Taken on the Lands End to John O’Groats virtual bike challenge on my exercise bike (874 miles). First thing I needed to do was upgrade the saddle for such a task. After much deliberation chose this one which has proved to be really comfortable and has made a massive difference. Over 60 miles in and no problems.
Dr. R. H. Moore
Reviewed in the United Kingdom on November 18, 2023
Very comfortable; a significant upgrade for a BikeErg!
Dana H
Reviewed in the United States on October 19, 2023
I've now put 1500 miles on my fat tire E-bike using this seat and I can't believe how comfortable AND durable it is. I'm a very large guy, 6'-3" 300+ lbs, who rides almost every day a minimum of 9 miles, but often 20 miles or more. This seat is even more comfortable than using padded biking shorts on any other seat. It still has plenty of cushion after all the abuse it's taken from an XXL rider over many miles, often on rough terrain. I give this product my highest recommendation. It's so good that I doubt I would ever buy a bike seat from another company. It's a little more expensive than most of the other seats on Amazon but very much worth the price.
Customer
Reviewed in Canada on January 13, 2023
Allows me to ride comfortably and with less pressure on man parts.
Flow
Reviewed in the United States on January 27, 2021
This was definitely an upgrade to the seat in which I was provided in my initial purchase of the bicycle (it isn't a cheap bicycle). I would describe this as a performance seat in which you'd use for longer rides and would like to benefit from a far more comfortable and "breathing" seat than your racing type "boards". With that, it doesn't take away from an active type or performance riding. If I've noticed anything and too a very small degree, the seat cushion elevates you higher than the flatter seats which is easily adjusted with the seat post. When riding in a more performance orientated posture when, in particular, going down steep hills, there is a slight grab between the legs (inner thighs) when moving your hips back to accommodate a slope. It's not that the seat is much wider - it's the type of material is more fibrous or textured than your standard seats which tends to be more of a smooth plastic. For me, it's a very small issue and barely noticeable. The seat seems to be durable - at least up to now and after having used it for approximately 500 miles. As seen in the product description, it's basically two seat portions, a left and right half, with the two being coupled with a semi flexible plastic. It would seem that the plastic coupling would be the weak link to the seat structure although, as mentioned, there has been no problem or sign of cracking, general wear etc. Also, I would add that the flexibility of the inner coupling allows for more of a comfortable ride by slightly adjusting to your movement. With that, the coupling does not overly give way - it's just slightly pliable. At this point, with the knowledge about the seat's construction and my experiences using it, I would buy it again and recommend it to others.
Mar Dacillo
Reviewed in Australia on June 22, 2019
What a great product. It's a bit pricey but very very comfortable seat.
Fsnah
Reviewed in the United States on November 28, 2011
I'm a big guy, 44yo, 5'10" and 230lbs. But I also ride my hybrid 28miles round trip to work five days a week. I needed a saddle that was comfortable to soak up the road and didn't compress the nether regions. Every saddle I have tried was either too narrow at the tail for my bum, didn't provide enough clearance to avoid compression or was too hard for longer rides. The Serfas RX is very comfortable with a great mix of padding and gel and most importantly the split design makes sure that nothing gets squished. If you're a road warrior with carbon everything this is not the saddle for you. It's too wide and too heavy. But if you're a modestly athletic middle age guy looking to stay in the saddle for a few more decades than you probably can't go wrong with this one.Some quick additional notes:- This saddle is about the split design, not performance, weight or even comfort (although I think it's quite good at soaking up the road).- It's not a terribly attractive saddle, but beauty is in the eye of the beholder...and I'll take a weird looking saddle over numbness.- I don't park my bike outdoors at either work or at home. Protection from the elements may have helped to keep the saddle in good shape.- Some people have asked me if the split design ever pinches. The answer is no.UPDATED 7/8/2013I have 1.5 years of 5 day a week, all weather riding on this saddle and I have to say that it's far and away the best saddle I've owned. Since the original post my commute has increased to 35 round-trip miles daily and it's just as comfortable. First off, the build quality is impressive. Despite an approximate 13,000 miles of usage the only signs of wear are some fading of the black lycra fabric covering and the silk screened art has peeled a bit. There are zero popped stitches, fabric tears or signs of structural fatigue. I do think that the gel/padding are getting a bit tired but I only really notice that on bumpier sections of pavement. I have two other bikes with different saddles, one is a road bike and it has the stock saddle with only a shallow channel and the other is my weekend beater and it has an after-market super squishy granny seat. This Serfas RX is far and away my favorite. The only reason I haven't switched out the other two saddles is pure laziness on my part.UPDATED 8/22/2016Still love this saddle enough that I finally bought a new one! Considering the abuse I put on my kit, I consider 5 years and ~30k miles a really good run. About 18mos ago I noticed that it lost some shock absorption. Not too extreme but on bigger jostles it felt like I was, pardon the pun, bottoming out. I didn't replace it right away, waited until last March, in hindsight I don't think I will wait next time.Still riding 5 days a week, although the last few winters took me off the road. I wasn't particularly cold, got good gear to keep me comfortable (I should probably write some reviews for those products as well!). However, my brake cables have frozen a few times. That's a bit scary. Anyway, 9 months a year I'm out there pedaling away!Other minor things... Most of the silk screen peeled away and there was definitely considerable fading of color. Interestingly, there weren't any popped stitches or rips in the lycra. Most importantly, so far the new saddle seems to be as well constructed as the original!Honestly, of all my bicycle accessory related purchases, this is one of the best decisions I've ever made.
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