Buy SEIDO Bike Components Online at Low Prices

Bikes
BIKES
Gravel Bikes
Bikepacking Gravel Bikes
Gravel Race Bikes
Road Bikes
Aero Road Bikes
Endurance Road Bikes
Fitness Bikes
Cyclocross Bikes
Triathlon Bikes
Mountain Bikes
Hardtail Mountain Bikes
Full Suspension Mountain Bikes
MTB Trail Bikes
Cross Country Mountain Bikes
Enduro Bikes
Downhill MTB & Freeride Bikes
BMX & Dirt Bikes
Touring Bikes
Randonneur Bikes
City Bikes
Hybrid Bikes
Urban Bikes
Folding Bikes
Kids Bikes
Kids Mountain Bikes
Balance Bikes
Kids Scooters
ELECTRIC BIKES
Electric Gravel Bikes
Electric Road Bikes
Electric Mountain Bikes
Hardtail E-Mountain Bikes
Full Suspension E-Mountain Bikes
Electric Enduro Bikes
Electric Touring Bikes
SUV E-Bikes
Electric City Bikes
Urban Electric Bikes
Folding Electric Bikes
Kids Electric Bikes
Electric Cargo Bikes
Parts
Drivetrain
Cassettes
Cranks
Chains
Chainrings
Bottom Brackets
Power Meters
Sprockets
Chain Guards
show more ...
Shifting Parts
Groupsets
Rear Derailleurs
Shifters
Hub Gears
Derailleur Hangers
Front Derailleurs
Rear Derailleur Accessories
Cockpit
Handlebars
Stems
Handlebar Tape
Handlebar Grips
Clip-On Bars
Headsets
Bar Ends
Bar End Plugs
Cables & Casings
Brakes
Disc Brakes
Rim Brakes
Bike Brake Fluids & Bleed Kits
Brake Parts
Tires & Tubes
Tires
Inner Tubes
Tire Accessories & Tubeless
Wheels
Wheels & Wheelsets
Hubs & Freewheels
Quick Releases & Thru Axles
Rims
Spokes & Nipples
Rim Tape
Pedals
Flat Pedals
Clipless Pedals
Hybrid Pedals
Cleats
Saddles
Seatposts
Rigid Seatposts
Dropper Posts
Suspension Seatposts
Seat Clamps
show more ...
Forks
Suspension Forks
Rigid Forks
Shocks & Coils
Frames
Ball Bearings
Tools & Maintenance
E-Bike Parts
Batteries & Chargers
Drive Units & Components
E-Bike Lights
E-Bike Brakes
E-Bike Forks
E-Bike Wheels, Rims & Hubs
E-Bike Tires
E-Bike Displays & Accessories
show more ...
Accessories
Water Bottles
Attachments
Lights
Bottle Cages
Luggage Carriers
Bike Computer Mounts
Phone Holders
Child Bike Seats
Bells
Fenders
Mirrors
Kickstands
Baskets
Front Bike Baskets
Rear Bike Baskets
show more ...
Bags
Pannier Bags
Handlebar Bags
Top Tube Bags
Frame Bags
Saddle Bags
Other Bags & Cases
Tool Bags & Bottles
Bag Accessories
Locks
D-Locks
Folding Locks
Cable Locks
Chain Locks
Frame Locks
Combination Locks
Lock Accessories
Cycling Backpacks
Hip Packs
Messenger Bags & Shoulder Bags
Hydration Reservoirs & Water Bladders
Bike Hydration Packs
Pumps
Shock Pumps
Electric Bike Pumps
CO² Pumps
Mini Pumps
Floor Pumps
Tubeless Pumps
Indoor Bike Training
Indoor Bikes
Turbo Trainers & Bike Rollers
Mounts
Display Stands
Wall Mounts
Transport
Bike Covers
Bike Racks
Bike Travel Bags
Trailers
Dog Bike Trailers
Kids Bike Trailers
Cargo Bike Trailers
Tools & Maintenance
Brake Fluids & Bleed Kits
Work & Repair Stands
Cleaners & Cleaning Kits
Bolts
Lubricants
Tools
Sports Nutrition & Body Care
Stickers
Electronics
Bike Lights
Battery Lights
Dynamo Lights
Front Lights
Rear Lights
Reflectors
Light Accessories
E-Bike Lights
E-Bike Headlights
E-Bike Tail Lights
Bike Computers
Navigation
Bike Computer Mounts
Mobile Phone Accessories
Phone Holders
Phone Bags & Cases
Cameras & Action Cams
GPS Trackers & Bike Alarms
Power Meters
Chest Strap Heart-Rate Monitors
Sports Headphones
Sports Watches
Power Supply
Speed & Cadence Sensors
Clothing
Cycling Shoes
Road Bike Shoes
MTB Shoes
Gravel Bike Shoes
Winter Shoes
show more ...
Bike Helmets
Road Bike Helmets
Gravel Bike Helmets
MTB Helmets
Downhill Helmets
Aero Helmets
E-Bike Helmets
show more ...
Cycling Sunglasses
Road Bike Glasses
MTB Glasses
show more ...
Cycling Jerseys
Road Bike Jerseys
MTB Jerseys
show more ...
Cycling Pants
Road Bike Pants
Bib Shorts
MTB Pants
MTB Shorts
Winter Trousers
Waterproof Trousers
show more ...
Cycling Underwear
Cycling Base Layers
Cycling Undershorts
Cycling Jackets
Road Bike Jackets
MTB Jackets
Rain Jackets
Winter Jackets
Vests
Windproof Jackets
show more ...
Cycling Gloves
Road Bike Gloves
MTB Gloves
Winter Gloves
show more ...
Other Clothing
Cycling Socks
Shoe Covers
Caps & Multifunctional Headwear
Arm, Leg, Knee Sleeves
Skinsuits
Triathlon Suits
Others
Body Armor
Knee Pads
Chest Protectors
Back Protectors
show more ...
Textile Care
Kids Clothing
Kids Helmets
Kids Glasses
Kids Shoes
Kids Jerseys
Kids Trousers
Kids Jackets
Kids Gloves
Kids Body Armor
Shoes
Outdoor
More Sports
Brands
SALE %
Brands %
ASSOS SALE
CUBE SALE
Garmin SALE
Hoka SALE
MAAP SALE
Rapha SALE
VAUDE SALE
Bikes %
Road Bike SALE
Gravel Bike SALE
MTB SALE
E-Bike SALE
E-MTB SALE
E-MTB Full-Suspension SALE
Categories %
Hot Deals
Outlet
B-Stock

Cycling
Running
Swimming
Triathlon
Fitness
Outdoor
Gift Certificates
Brands
Advice
SALE %

|

Home
Brands
SEIDO
Components
Headsets

Popularity

SEIDO

PRO IS Headset Tapered - IS42/28.6 | IS52/40 - black

31,92 €*

SEIDO

PRO EC Headset Tapered - EC34/28.6 | EC44/40 - black

49,57 €*

SEIDO

SPARK Expander 1 1/8 - black - 23.6mm

27,72 €*

Back Next

Page: 1

OUR TOP BRANDS

Brand Overview

Build
Your Ride.

Excellent
30-day return policy
Free help and advice

Subscribe to our newsletter

Always one gear ahead: Get exciting new releases, exclusive deals, and the hottest top brands – delivered straight to your inbox.

About BIKE24

Legal notice
Corporate website
Join our team
Terms and conditions
Right to cancel
Privacy policy
Disposal and recycling

HELP & SUPPORT

Contact & FAQ
Returns and claims
Shipping and handling
Payment
Track your order
Frame size guide
Manufacturer sitemap
Delivery and product availability
Price guarantee
Bike assembly and shipping
Advice

PAYMENT OPTIONS

WE SHIP WITH

International

English int.
Deutsch
Deutsch
Español
Français
Italiano
Nederlands
Français
Deutsch
Français
Nederlands
Suomi
Polski

[*] For deliveries within the EU, all prices include VAT plus shipping costs. For deliveries to countries outside the EU, prices may exclude VAT, plus shipping costs and may also incur additional import charges. Please refer to the price information on the specific product page.

[**] The stated delivery time includes the complete processing of the shipment at BIKE24 and transport to the delivery address you provided. For items not in stock, it also covers the time needed to procure the goods from our suppliers. The stated delivery time refers to the currently selected delivery country .
The DHL Express option is generally subject to a surcharge. DHL Express can be selected during checkout if all items in the shopping cart offer the Express option and DHL Express is available for the selected country. We display the remaining time for receiving the order in exact hours and minutes. For DHL Express deliveries, parcel transit times may be longer depending on the postal code of the delivery address. Once the postal code is entered, the exact parcel transit time for that address will be calculated. If you are logged in to your account, we will use the postal code of your default delivery address to calculate the DHL Express transit time.
If you order multiple items with different delivery times, shipping will begin once all items are ready for dispatch. For the payment method “cash in advance,” delivery time will be extended, as shipping will not start until payment is actually received. The status “Not deliverable” indicates items that are currently unavailable and for which there is no reliable availability information. These items cannot be ordered. We recommend choosing other available products from the BIKE24 range. More about delivery.

[5] Savings compared to the recommended retail price of the manufacturer or German importer.

[8] The shipping promise is only valid for delivery to Germany. This includes all items with the shipping promise symbol. For more information on the delivery time, please see the detailed view of the respective product. More about the shipping promise.

[9] Only available in Germany – Available for orders from €499. 5.9% annual percentage rate (APR) with a term of 6 to 60 months. Financing is provided by our partner, TARGOBANK AG & Co. KGaA, Kasernenstraße 10, 40213 Düsseldorf, Germany. Subject to credit approval. No fees.

[10] Only available in Germany – The stated “leasing price” is a guideline for 36 months of use and is calculated from the purchase price minus any potential income tax benefits from a salary conversion. The calculation assumes the maximum possible income tax benefit. Your actual savings depend on your income and personal circumstances and may be lower. Transfer costs at the end of the lease are not included. You can calculate your individual lease rate using the calculators provided by our leasing partners on our leasing information page. Please note that for discounted items under leasing, we apply a 5% surcharge to the purchase price shown in the webshop – but never more than the manufacturer’s suggested retail price (MSRP).