Smiling Butt Kit

Name: Smiling Butt Kit
Brand: Posedla
SKU: SBK_IF
Availability: InStock

Our special measurement kit made from permanent foam and designed to determine your sit bones width.

$0.00

What's included: +

Smiling Butt Kit (ships next day) impression foam for your sit bones measurement

Custom 3D-printed Joyseat including color clip and nickname of your choice

Continuous access to our customer support via chat, email, or phone

100% satisfaction guarantee (read more)

Why Custom Saddle?

Saddle Pain Relief

Solve Your Saddle Sores for Good

No more trial and error. Our custom-fit saddles target pressure points to eliminate soreness—finally, real relief that lasts.

HAMILTON H. United States

“I have struggled with saddle sores and tried half a dozen saddles. After getting the Joyseat, the problems vanished. It’s truly a game-changer.”

Numbness & Pressure

Say Goodbye to Numbness

Tingling and pressure mean your saddle doesn’t fit. Joyseat aligns with your anatomy for pain-free rides that go the distance.

ZACH N. United States

“I had saddle issues for 10 years before I tried Joyseat. I’ve now ridden over 6 hours without any numbness or pain. Unreal difference.”

Tried & Surprised

Because the Hype Is Actually Real

Custom saddle sounds like marketing fluff—until you try it. That’s when skeptics become believers, and comfort becomes addictive.

DAN P. Germany

“I honestly didn’t expect much. But after just a few rides, I was blown away by the comfort and how natural it felt. Never going back to off-the-shelf.”

Imprint Photogrammetry

Made from Your Butt, Not a Catalog

With our Smiling Butt Kit, your saddle is shaped by you—from sit bone width to riding style. It’s not guesswork. It’s geometry.

DAVID F. United States

“Easy fitting process and very communicative team. The Smiling Butt Kit was fun to use, and the result is genuinely personalized comfort.”

All-Ride Comfort

Custom Comfort for Every Ride

Gravel, road or MTB—Joyseat adapts to your discipline and body, making long days in the saddle feel surprisingly short.

KIKE M. Netherlands

“It’s my saddle choice for Badlands! I’ve ridden it in gravel races and bikepacking tours. One saddle that works on everything.”

What Makes Your Saddle Custom?

3S System

Size

While traditional saddles offer a limited selection of widths, we've expanded the spectrum. Joyseat comes in 40 widths, ranging from 130 to 170 millimeters.

3S system

Shape

Joyseat offers a comprehensive range of saddle shapes, from flat profiles for flexible road cyclists to curved designs for mountain bikers with a stiffer back.

3S System

Stiffness

Through the power of 3D printing, we are able to tailor the padding stiffness according to your BMI, gender, age and annual mileage.

3S system

Personalization

Add your name and a touch of color to match your frame or kit or whaterver you fancy.

Tailored to Every Bike Type

ROAD

Flatter, less padded saddle for comfort on tarmac

Flat saddle profile
Thinner padding
No pressure cut-out

GRAVEL

Medium padded saddle to tackle the paths less traveled

Medium saddle profile
Medium padding
No pressure cut-out

MTB

More articulated shape and more padded saddle for adventures with suspension

Curvy saddle profile
Thicker padding
No pressure cut-out

TT

Flat saddle with extra padded nose and extended relief channel

Flat saddle profile
Wider and extra padded nose
Extended pressure cut-out

Joyseat Variants

PLUS

Accessible comfort, fully custom-fit

Fully custom padding
Nylon shell
7×7 mm stainless steel rails
Weight from 220g
No load limit
Ships in 2—4 weeks

$399

PRO

Lightweight custom saddle for fast rides

Fully custom padding
Twill carbon shell
7×9 mm UD carbon rails
Weight from 165g
100 kg load limit
Ships in 4—5 weeks

$499

ULTRA

Our lightest, stiffest, pro-level fit

Fully custom padding
UD carbon shell
7×9 mm UD carbon rails
Weight from 155g
110 kg load limit
Ships in 4—5 weeks

$599

Saddle Customization:
Made-to-Measure vs. Presets & Stock Saddles

LEARN MORE

What's Coming Next?

Butt Imprint →

Imprint your buttocks into the Smiling Butt Kit in just your underwear—no cycling shorts! Take a picture (of the imprint… of course) and send it to us.

Configuration →

Complete an online configurator consisting of 10 questions about your bike, your riding style, yourself and the desired look of your Joyseat.

Manufacturing →

We have all we need for our algorithm to design every aspect of your saddle. Next, we fire up our 3D printer and complete the saddle by hand.

Just Joy →

Joyseat has finally crossed the finish line after going through some laps of quality control. Mount it on your bike and start riding pressure-free.

Manufacturing Timeline

How Is Joyseat Manufactured?

LEARN MORE

Ridden by the Best

PETR VAKOČ

pro gravel rider | national champion

THOMAS DE GENDT

pro gravel rider | TdF stage winner

TOMÁŠ BÁBEK

ex-pro track rider | European champion

MARTIN FUKSA

sprint canoeist | world champion

VOJTA BLAHA

enduro cyclist | national champion

TEREZA HUŘÍKOVÁ

ex-pro MTB rider | world champion

JOSIE LORI MILLARD

gravel cyclist | skateboarder

JORDY BOUTS

pro gravel rider

MARKÉTA DAVIDOVÁ

biathlete | world champion

DAPHNÉ MERLEVEDE

speed skater | road cyclist

JIŘÍ JEŽEK

para-cyclist | world champion

MAX RIESE

ultracyclist | world record holder