Contact information, map and directions, contact form, opening hours, services, ratings, photos, videos and announcements from ξ /ksi/ cycling, Bicycle shop, Athens.
03/11/2025
Pick the one that fits your style—and customize as you go.
The ξ /ksi/ slave cylinders let you choose the setup that matches your riding style—then fine-tune it further by swapping pistons, springs, and internals.
👉 Available at .eu
17/10/2025
From raw stock to the finalized product, we chase precision and quality at every stage of the CNC process. The ξ /ksi/ slave cylinders are engineered, inspected, and finished to perform—ride after ride.
👉 Available at .eu
09/10/2025
Pro tip for your first ksi setup! ⚙️
When you grab a set of ξ / ksi / slave cylinders, make sure to include a bleed fitting for your brake line.
It’s the small part that makes the big difference — without it, you can’t bleed the system properly and unlock that perfect ksi brake feel.
Precision starts with the details. 🔧
04/10/2025
More grip, more control. ⚡
The ξ / ksi / rosin blocks are made from pure pine rosin blended with organic beeswax — both sourced locally here in Greece.
Designed to instantly boost rim brake power without contaminating your pads or rims, and perfectly matched to our ksi brake pads and ground rims.
Hand-crafted, small-batch, rider-tested.
Because sometimes, the simplest tools make the biggest difference.
25/09/2025
The ξ /ksi/ slave cylinders adapt to your style!
Our slave cylinders are fully customizable — even after purchase. Swap pistons, springs, and internals to fine-tune feel, power, and response to match your riding style.
Because precision isn’t one-size-fits-all.
15/09/2025
🚨 They’re back! 🚨
The ξ /ksi/ cycling slave cylinders are officially back in stock — and they’re better than ever.
After refining the design and pushing the limits in the workshop, this second batch comes with subtle improvements that make a big difference on the bike. Precision-engineered, rider-tested, and ready to deliver the braking power ξ /ksi/ cycling slave cylinders are known for.
⚡ Only 10 pairs available in this batch.
⚡ Once they’re gone, you’ll need to wait for the next production run.
If you want to be part of the ksi project and ride with the same passion we put into building these, now’s the time 👉 get yours .eu
31/12/2024
2024 is over and we're excited as it was a very creative and productive year!
We wish you all a great new year and we promise you that more products are coming for 2025!
Follow us on our product development journey!
Get all of our products now at .eu
See bio for our website link and follow for more videos and photos to come!
06/12/2024
Are you ready for the upcoming world championship? Get the ξ /ksi/ cycling slave cylinders now and get them next week!
For the first time ever riders have the option to experiment and configure their slave cylinders to match their personal preferences and riding style!
Get them now at .eu
See bio for our website link and follow for more videos and photos to come!
04/11/2024
The ξ /ksi/ cycling brake pads were developed form the ground up both considering their compound and their backings.
Backings are precision CNC machined out of 7075-T651 aluminum alloy. Due to the exceptional strength of the backing’s material, they were machined to be as light as possible while maintaining their structural integrity.
They are refillable and their pads' compound was developed from scratch to optimize braking power and performance! Also, it’s highly recommended to be used with ground rims and if you want to maximize your braking performance you can combine them with any of the rosin products.
You can get them now by going to our e-shop at .eu
03/05/2024
We're so happy and excited to announce that the ξ /ksi/ cycling slave cylinders are finally available and you can get them at our e-shop at .eu
For the first time ever you have the opportunity to customize your slave cylinders to match your personal preferences and riding style! Also, these slave cylinders are fully repairable which means that you can take them apart whenever you want in order to clean them and regrease them to make them feel like new again!
These slave cylinders pack some additional features that you've never seen before! If you haven't already watched the relevant videos that have been already uploaded, go check them out at the .siasos YT channel!
Also, if you want to get any of the ξ /ksi/ cycling goodies, you can find them at our e-shop by going to the .eu
See bio for our website link and follow for more videos and photos to come!
08/04/2024
GIVEAWAY ALERT!!! Enter to win a set of two ξ /ksi/ cycling slave cylinders of your choice!
The ξ /ksi/ cycling slave cylinders are the first customizable and fully repairable slave cylinders and they will be officially released on May 1st, 2024!
However, you have the opportunity to win a set of slave cylinders of your choice before they get released!
You can choose between aluminum or plastic pistons, regular or hard springs, and stainless steel or titanium fittings and internal parts giving you a total of 8 different possible combinations to choose from and fine tune your brakes to your liking!
If you want to learn more about the ξ /ksi/ cycling slave cylinders, you can visit the website and watch the relevant videos on the "Alexandros Siasos" YouTube channel!
⬇️HOW TO PARTICIPATE ⬇️
1. Follow and .eu on Instagram.
2. Like this post.
3. Tag two of your trials friends.
4. Share this post into your story and tag us (note that we'll be able to see your story only if your account isn't private)
OPTIONAL FOR AN ADDITIONAL ENTRY: Subscribe to the "Alexandros Siasos" YouTube channel and comment that you want to enter the giveaway and your Instagram username on any of the upcoming slave cylinders related videos! Each name will be added to the draw sheet at the end of the competition for a second time!
What you can win! 🎁
A set of two ξ /ksi/ cycling slave cylinders of your choice!
The winner will be contacted directly by via Instagram DM after the giveaway has ended. Do not reply or answer to any accounts that are not the official accounts of the users involved with this giveaway. Please report scams and fake accounts. Do not give your credit card or financial information to anyone as this is not required to win these slave cylinders.
🔜 Giveaway ends on April 29th, 2024
16/02/2024
For the first time ever riders will have the option to experiment and configure their slave cylinders to match their personal preferences and riding style!
So, everyone will be able to choose between different materials and overall specifications for almost every part of their slave cylinders!
Coming soon .eu
Stay tuned 👊😉🚴
These slave cylinders pack some features that you've never seen before! If you haven't already watched their presentation video that was uploaded last week, go check it out at the .siasos YT channel!
Also, if you want to get any of the already released ξ /ksi/ cycling goodies, you can find them at our e-shop by going to the .eu
See bio for our website link and follow for more videos and photos to come!