Headsets

Why We Make This: The simple answer is that many contemporary bicycle frame designs call for the headset bearings to ride inside the frame’s headtube. After decades of making press-in bearing headsets, we needed to make headsets that worked in these newer frames. From the beginning we understood that integrated headsets posed a unique challenge in that the bearings are not pressed into a cup and sit loosely in the frame. When bearings are not pressed securely into a cup they shift and move, rapidly losing preload. As preload drops, the bearings are more susceptible to creaking, damage, and failure. That’s a problem we know how to solve. Why You Want It: Enter, our patented GripLock™ bearing cap. The GripLock™ preloads the headset independently of clamping onto the steerer, so it retains preload far better than the competition and is impervious to the ill effects of load spikes from large hits and heavy braking. This means smoother steering, no more creaking, and a longer lasting headset. Our GripLock™ design also takes the guesswork out of preloading a headset, because the bearing preload force is independent of the clamping force. Our headsets can be preloaded to a torque spec. Compatible with Open, 3T, All City, Low, Cinelli, Lynskey, and more. - Engineered, manufactured and assembled in Portland, Oregon USA - King Lifetime Warranty - Legendary made-in-house bearings - Patented GripLock® retention design for dependable headset adjustment (US Patent 8662517) - 42mm 45x45 upper bearing for 2.8-3.0mm bearing ream depth. - 52mm 45x45 lower bearing - Compatible with our included baseplate and 45 degree integrated crown races

Cane Creek compatible integrated style bearings fit directly into headtube. - 36-degree inner chamfer and 45-degree outer chamfer - Crown Race: 30 - S.H.I.S. Lower: IS41 - S.H.I.S. Upper: IS41 - S.H.I.S. Stem Clamp Diameter: 28.6 Threadless

Replacement headset uppers from FSA - Internal HS Upper Orbit-Z - Steerer diameter: 1-1/8" - ZS44/28.6 (36 x 45) - 5.3/13.1mm

Cane Creek's 10 Series has light, tough, and beautiful machined 6061 T6-aluminum cups, Cane Creek's corrosion-resistant black-oxide angular-contact bearings and quality seals throughout to keep the grease in and the dirt out. • Technical Description: EC49/40/H12/K • Bottom Type: EC - External Cup • Bottom Head Tube Inside Dia.: 49.61mm • Crown Race Seat Dia.: 39.79mm • Crown Race Type: Polymer • Bottom Stack Height: 12mm • Bottom Bearing Type: Black Oxide • Material: 6061 aluminum • Weight: 76.57g

• Sealed cartridge bearings • CNC machined 6061-T6 aluminum cups with laser etched logos • 26.4mm & 27.0mm races included • S.H.I.S.: EC30/25.4-24tpi|EC30/26 • Steerer Diameter: 25.4mm • Cup Diameter: 30.2mm • Race Diameter: 26.4mm • Stack Height: 42.5mm • Size: 1-inch • Black or Silver • Weight: 110g including lock nut

New dust cap design, with Monogram laser etched logo, for a cleaner look to accommodate a taller riding set up with less spacers. Same quality as Odyssey's Pro Headset using high-quality sealed bearings and a precision tapered wedge to keep the headset tight at all times. FEATURES - High-quality sealed bearings. - Color matched spacers included. - 15mm dust cap. With 3mm, and 2mm spacers - Laser etched Odyssey bearings. SPECS - Campagnolo standard spec. - 1 1/8-inch integrated headset. - 45º tapered bearings - 41.8mm outer diameter (fits 42mm BMX head tubes).

Crown races for Cane Creek headsets fit a variety of lowers and crown race seat diameters. - Compatible with 10-, 40- and 110-Series headsets and backwards compatible with S and XX Series - Integral mold seals keep out the elements - Durable steel construction

Wolf Tooth Premium headsets feature high-end bearings made by Enduro. They are engineered to use the largest possible ball size and are filled with high-pressure waterproof lubricant. A pair of dual-lip seals ride in micro-grooves to keep out water and debris. - Stainless Steel Bearings provide unparalleled corrosion resistance - Highly recommended if your headset will be exposed to wet conditions or sweat - Lifetime warranty - Lower Bearing, includes race

- Steel cup semi-integrated design - Alloy top cap with hollow bolt allows for brake cable pass-through - Caged bearing 5/32" x 22A - ED Black durable finish - SHIS: ZS44/28.6|ZS44/30 - Steerer OD: 28.6mm - Cup: 44mm - Race: 30mm - Stack Height: 9.4mm

- CrMo headset with oversized 3/16" lower ball bearings, 5/32" upper bearings and a nylon top cover - Hammer: External Cup, traditional - S.H.I.S.: EC34/28.6|EC34/30 - Stack: 12.8mm/11.9mm - Color: Black - Weight: 149g

The FSA Orbit Z headsets feature a very low-profile design primarily for ATB and are compatible with Cane Creek internal style headsets. - "Zero-Stack"/Cane Creek compatible - Very low profile designed primarily for Mountain Bikes - Patented alignment tip for increased durability and performance - TH brand 36-degree Micro Angular Contact Bearings (red seal) - 7075 alloy crown race - Laser etched aluminum top cap - Weight: 89g

The 40-Series is the workhorse of Cane Creek's headset line-up. Representing the balance of performance, durability, and value, the series incorporates all the features necessary for a robust, lightweight, long-lasting headset. Integrated bearings fit directly into compatible head tubes without the need of a bearing press. - Sealed black oxide bearings - Carbon-friendy compression ring captured in top cover, keeping shims in place - Steel crown race with integrated seals - Interlok spacer compatible - Uses 36/45 degree crown race and compression ring - Compatible with tapered 1-1/8" to 1-1/2" steerer tubes, or straight 1-1/8" steerers with a conversion crown race (sold separately)

Hellbender 70 Slam Top Assembly headset.

This is the Bottom External Cup for the Cane Creek 40 Series headset. Please contact us if you have any questions about which parts are correct for your headset.

Super-smooth steering, quality materials, cutting-edge design and serious durability are all hallmarks of Cane Creek's 40-Series headsets. • Technical Description: ZS56/30/H4/K • Bottom Type: ZS - ZeroStack • Bottom Head Tube Inside Dia.: 55.95mm • Crown Race Seat Dia.: 30.015mm • Crown Race Type: Steel, Face-Sealed • Bottom Stack Height: 4mm • Bottom Bearing Type: Black Oxide, Sealed • Material: 6061 aluminum • Weight: 88g

FSA Standard Headset Bearings

The 40-Series is the workhorse of Cane Creek's headset line-up. Representing the balance of performance, durability and value, the series incorporates all the features necessary for a robust, lightweight, long-lasting headset. Zero stack uppers press into head tube with very little stack height. Lowers are either zero stack or external cup. - Sealed black oxide bearings - Carbon-friendy compression ring captured in top cover, keeping shims in place - Steel crown race with integrated seals - Interlok spacer compatible - Compatible with tapered 1-1/8" to 1-1/2" steerer tubes, or straight 1-1/8" steerers with a conversion crown race (sold separately)

Cane Creek's 10 Series has light, tough, and beautiful machined 6061 T6-aluminum cups, Cane Creek's corrosion-resistant black-oxide angular-contact bearings and quality seals throughout to keep the grease in and the dirt out. • Technical Description: EC34/28.6/H16/K|EC34/30 /H12/K • Top Type: EC - External Cup • Top Head Tube Inside Dia.: 33.95mm • Stem Clamp Dia.: 28.6mm • Top Stack Height: 16mm • Top Bearing Type: Black Oxide • Bottom Type: EC - External Cup • Bottom Head Tube Inside Dia.: 33.95mm • Crown Race Seat Dia.: 30.015mm • Crown Race Type: Polymer • Bottom Stack Height: 12mm • Bottom Bearing Type: Black Oxide • Material: 6061 aluminum • Weight: 88.29g

Super-smooth steering, quality materials, cutting-edge design and serious durability are all hallmarks of Cane Creek headsets. The 40 Series has light, tough, and beautiful machined 6061 T6-aluminum cups that are internally relieved for even more gram shaving. You also get Cane Creek's corrosion-resistant black-oxide sealed bearings and quality seals throughout to keep the grease in and the dirt out, including Cane Creek's Clip Seal that completely seals the top assembly.

Why We Make This Headtube and fork steerer standards have proliferated in recent years, but for a long, long time these variables were more fixed, so we made thousands upon thousands of NoThreadsets™ to serve bikes with unthreaded fork steerers. We made them in a variety of diameters, and everyone was happy in the land. We still make it, because it’s still a great headset for all those bikes that are still rolling through the world with a headset that will never die. Why You Want It For decades our NoThreadSet™ set the standard for quality headset function delivering precision performance to numerous world champions, grand tour winners, and aspiring riders around the world. Every Chris King headset is built with our heat-treated bearings, and surgical-grade steel races machined simultaneously to ensure they are perfectly matched. As Chris King bearing tracks age and burnish, they actually get smoother, and all headsets are fully serviceable for years upon years of demanding riding. - Engineered, manufactured and assembled in Portland, Oregon USA - King Lifetime Warranty - Legendary made-in-house bearings - Patented GripLock® retention design for dependable headset adjustment (US Patent 8662517) (1-1/8” only) - Available in 8 beautifully anodized colors in both bold and sotto voce marking options - Responsibly lightweight - Options to fit 1” and 1-1/8” straight steerer tubes

Chris King DropSet 3 Headset. - Crown Race: 30 - S.H.I.S. Stem Clamp Diameter: 28.6 Threadless - Bearing Type: Cartridge - S.H.I.S Lower: IS52 - S.H.I.S Upper: IS41

Designed using high-quality sealed bearings and a precision tapered wedge to keep the headset tight at all times. FEATURES - High-quality sealed bearings. - Color matched spacers included. - 10mm, 3mm and 2mm (15mm total) - Laser etched Odyssey bearings. SPECS - Campagnolo standard spec. - 1-1/8 integrated headset. - 45º tapered bearings 41.8mm outer diameter (fits 42mm BMX head tubes).

The 40-Series is the workhorse of Cane Creek's headset line-up. Representing the balance of performance, durability and value, the series incorporates all the features necessary for a robust, lightweight, long-lasting headset. Zero stack uppers press into head tube with very little stack height. Zero stack cups press into the head tube with very little stack height. - Sealed black oxide bearings - Steel crown race with integrated seals

Wolf Tooth headsets are machined in the USA with aircraft-grade 6061 aluminum. Our headsets have three levels of superior custom sealing to protect bearings from the elements and prolong the life of the headset. They are designed to be lightweight, strong, and durable. Available in a variety of colors. These EC headsets are for frames with external bearing cups, which places the bearing outside of the frame with these headsets. Premium Headsets with Enduro stainless steel bearings have a lifetime warranty. Upper assembly features: - Ultralight Stem Cap With Integrated Spacer plus an aluminum bolt and a star nut. - 5mm cover = 16mm total stack, 15mm cover = 25mm total stack, 25mm cover = 35mm total stack. - O-ring seal prevents water intrusion around the steerer tube. - Custom-molded upper lip seal provides additional protection for upper bearing.

Wolf Tooth headsets are machined in the USA with aircraft-grade 6061 aluminum. Our headsets have three levels of superior custom sealing to protect bearings from the elements and prolong the life of the headset. They are designed to be lightweight, strong, and durable. Available in a variety of colors. These EC headsets are for frames with external bearing cups, which places the bearing outside of the frame with these headsets. Premium Headsets with Enduro stainless steel bearings have a lifetime warranty. Lower assembly features: - Custom molded dual-lip seal on the crown race to protect the lower bearing in the toughest conditions. - 12.25mm stack. - Service and additional parts available.

Wolf Tooth headsets are machined in the USA with aircraft-grade 6061 aluminum. Our headsets have three levels of superior custom sealing to protect bearings from the elements and prolong the life of the headset. They are designed to be lightweight, strong, and durable. Available in a variety of colors. These EC headsets are for frames with external bearing cups, which places the bearing outside of the frame with these headsets. Premium Headsets with Enduro stainless steel bearings have a lifetime warranty. Lower assembly features: - Custom molded dual-lip seal on the crown race to protect the lower bearing in the toughest conditions. - 12.25mm stack. - Service and additional parts available.

Wolf Tooth headsets are machined here in our Minnesota shop with aircraft-grade 6061 aluminum. They are designed to be lightweight, strong, and durable. Our headsets have three levels of industry-leading custom sealing to protect bearings from the elements and prolong the life of the headset. Available in a variety of colors. These ZS headsets are for frames with internal bearing cups that are pressed into the frame. Premium Headsets with Enduro stainless steel bearings have a lifetime warranty. Lower assembly features: - Custom-molded dual-lip seal on the crown race protects lower bearing in the toughest conditions. - All components are precision machined in-house at Wolf Tooth from aircraft-grade aluminum to ensure the highest level of quality. - Service and additional parts available.

Crown races for Wolf Tooth headsets. - For Wolf Tooth headsets

The GeoShift Performance Angle Headset allows you to adjust the geometry of your bike by changing the head tube angle, available in 1 or 2 degree options. This unique design lets the bearings sit at an angle to align with the steerer tube, preventing creaking noises commonly found with angle headsets that feature a spherical design. Reduce the head tube angle to make for slacker geometry and added stability on fast descents, or increase the angle using the opposite orientation of the headset, to make for steeper geometry and quicker steering with maximum front wheel traction. - Enduro black oxide coated chromium steel bearing included on both the upper and lower - Upper headsets ship with a star nut which can only be used on forks with steel or aluminum steerer tubes. For forks with carbon steerer tubes you will need a compression plug (sold separately) - Machined in the USA with lightweight, strong, durable aircraft-grade 6061 aluminum - Includes: Upper and lower cups, bearings, crown race, star nut, shims, stem cap with 5mm integrated spacer and bolt - 1 Degree Adjustment - Short version is designed for headtube lengths between 90 - 115 mm

Wolf Tooth Performance Headsets are machined out of aircraft grade aluminum and assembled with Black Oxide Cartridge Bearings, balancing quality and price. - Black Oxide Bearings are made from chromium steel for high load capacity and durability - Black oxide coating reduces corrosion

Wolf Tooth headsets are machined here in our Minnesota shop with aircraft-grade 6061 aluminum. They are designed to be lightweight, strong, and durable. Performance Headsets with Enduro black oxide bearings have a one-year warranty. Our headsets have three levels of industry-leading custom sealing to protect bearings from the elements and prolong the life of the headset. Available in a variety of colors. These ZS headsets are for frames with internal bearing cups that are pressed into the frame. Lower assembly features: - Custom-molded dual-lip seal on the crown race protects lower bearing in the toughest conditions. - All components are precision machined in-house at Wolf Tooth from aircraft-grade aluminum to ensure the highest level of quality. - Service and additional parts available.

Origin-8's Pro Fit Threadless Headset is made of light and durable aluminum and boasts smooth and long-lasting sealed cartridge bearings. It also sports nice laser-etched logos.

The FSA Orbit XL-II threadless headset features replaceable sealed cartridge bearings and an AL-7075 crown race. - Forged and CNC machined 6061/T6 aluminum cups - Patented alignment tip for increased durability and performance - TH Brand 36-degree Angular Contact sealed bearings - Laser etched aluminum top cap

The FSA Orbit Z headsets feature a very low-profile design primarily for ATB and are compatible with Cane Creek internal style headsets. - "Zero-Stack"/Cane Creek compatible - Very low profile designed primarily for Mountain Bikes - Patented alignment tip for increased durability and performance - TH brand 36-degree Micro Angular Contact Bearings (red seal) - 7075 alloy crown race - Laser etched aluminum top cap

- CrMo headset with oversized 3/16" lower ball bearings, 5/32" upper bearings and an alloy top cover - Mallet: External Cup, traditional - S.H.I.S.: EC34/28.6|EC34/30 - Stack: 15.4mm/13.6mm - Color: Black - Weight: 150g

This is the Bottom for the Cane Creek 110 Series ZeroStack headset. Please contact us if you have any questions about which parts are correct for your headset. - For 1.5-inch crown race diameter - Stack height: 4mm - 54 grams

Backed by a 110-year warranty and constructed in Fletcher, NC, the 110-Series headset is designed with no compromises in quality, durability, or finish quality. Integrated bearings fit directly into compatible head tubes without the need of a bearing press. - Sealed stainless steel bearings - Carbon-friendy compression ring captured in top cover, keeping shims in place - 7075 T-6 aluminum cups machined in Fletcher, NC - Interlok spacer compatible - 110 year warranty

Cane Creek headsets with Hellbender stainless steel bearings with increased sealing elements and more grease in relation to the comparable 110 bearing. - Designed to bridge the gap between the 40-series and 110-series headsets

Super-smooth steering, quality materials, cutting-edge design and serious durability are all hallmarks of Cane Creek's 40-Series headsets. • Technical Description: IS52/30/H1 • Bottom Type: IS - Integrated • Bottom Head Tube Inside Dia.: 52.1mm • Crown Race Seat Dia.: 30.015mm • Crown Race Type: Steel, Face-Sealed • Bottom Stack Height: 1mm • Bottom Bearing Type: Black Oxide, Sealed • Material: N/A • Weight: 72g

Sealed cartridge bearings that drop directly into the head tube. - Upper includes top cap - S.H.I.S.: IS52/28.6 - Stack: 8.3mm

- 1-1/8" / 1.5", 36°/ 45° ACB - For tapered 50mm / 62mm OD head tube - For 1-1/8" to 1.5" tapered fork - Alloy top cover - Upper: Forged alloy cup with ACB (black seal) - Lower: 1.5" CNC machined alloy cup with ACB (black seal) - Stack Height 16.9+2.9=19.8mm - 124.6 grams

• Steel • Retainer ball bearings, includes top cap and star nut • 1 1/8 inch • S.H.I.S.: EC34/28.6, EC34/30

Wolf Tooth headsets are machined here in our Minnesota shop with aircraft-grade 6061 aluminum. They are designed to be lightweight, strong, and durable. Our headsets have three levels of industry-leading custom sealing to protect bearings from the elements and prolong the life of the headset. Available in a variety of colors. These ZS headsets are for frames with internal bearing cups that are pressed into the frame. Premium Headsets with Enduro stainless steel bearings have a lifetime warranty. Upper assembly features: - Ultralight stem cap with integrated spacer plus an aluminum bolt and a star nut. - 6, 15, and 25 mm stack height top cover options (6mm cover = 6mm total stack, 15mm cover = 15 total stack, 25mm cover = 25mm total stack). - O-ring seal prevents water intrusion around the steerer tube. - Custom-molded upper lip seal provides additional protection for the upper bearing.

The Absolute Best Well over a decade ago, we set out to make the best premium headset on the market. With our 110 Series, we did just that, utilizing optimal materials, the most effective seals and the best aesthetics. With the flexibility to purchase complete assemblies or separate Tops and Bottoms, tops are available in either short (9mm) or tall (15mm) stack height bearing covers, the 110-Series offers a premium solution for nearly all straight and tapered configurations on the market today. From Integrated (IS) Tops to External Cup (EC) Conversion Bottoms and everything in between, you can mix and match your headset purchase to best meet your needs. - Technical Description: 110-Series IS41/28.6/H9 | IS52/40 - Top Type: IS - Integrated - Top Head Tube Inside Dia.: 41.1mm - Stem Clamp Dia.: 28.6mm - Top Stack Height: 9mm - Top Bearing Type: Top-quality, sealed stainless steel bearings - Bottom Type: IS - Integrated - Bottom Head Tube Inside Dia.: 52.1mm - Crown Race Seat Dia.: 39.79mm - Crown Race Type: Aluminum, Dual-Seal - Bottom Stack Height: 1mm - Bottom Bearing Type: Top-quality, sealed stainless steel bearings - Material: N/A - Weight: 79.48 grams

Super-smooth steering, quality materials, cutting-edge design and serious durability are all hallmarks of Cane Creek's 40-Series headsets. • Technical Description: IS41/28.6/H9/K|IS52/40/H1 • Top Type: IS - Integrated • Top Head Tube Inside Dia.: 41.1mm • Stem Clamp Dia.: 28.6mm • Top Stack Height: 9mm (Short), 15mm (Tall) • Top Bearing Type: Black Oxide, Sealed • Bottom Type: IS - Integrated • Bottom Head Tube Inside Dia.: 52.1mm • Crown Race Seat Dia.: 39.79mm • Crown Race Type: Steel, Face-Sealed • Bottom Stack Height: 1mm • Bottom Bearing Type: Black Oxide, Sealed • Material: 6061 aluminum • Weight: 87g

- Carbon fiber top cover - Upper: Campagnolo angular contact bearings (black seal) - 1-1/8-inch, 45 degrees/ 45 degrees ACB upper - 1.5-inch, 36 degrees/ 45 degrees ACB lower - For tapered 46mm/56mm OD headtube - For 1-1/8-inch to 1.5-inch tapered fork

- Gyro compatible, 45/45 degree angular contact cartridge bearings, alloy crown race - Impact: 45x45 degree Campagnolo Integrated - S.H.I.S.: IS42/28.6|IS42/30 - Stack: 8mm/1mm - Color: Black, Orange, Red - Weight: 68g

Cane Creek's AngleSet transforms your ride. It enables an effective head-tube angle adjustment of up to +/- 1.5-degrees so you can fine-tune your mountain bike's front-end handling to best suit your riding style, local terrain and race course. Installation is straightforward because the AngleSet automatically adjust to fit different head tube lengths and angles. All AngleSet headsets have light, tough, and beautiful machined 7075 T6-aluminum cups with Cane Creek's corrosion-resistant black-oxide sealed bearings and quality seals throughout to keep the grease in and the dirt out.

- Machined aluminum spacers for tuning stem height - Black spacers with white FSA graphic - 5mm and 10mm Spacers are sold individually - 1-1/8" Spacer Kit includes: (3) 3mm, (4) 5mm, (3) 10mm, (2) 20mm

The Origin8 Twistr Integrated Headset features highly polished sealed angular contact premium bearings ensure smooth operation. Its CNC-machined AL6061 top cover is sealed to keep moisture and grit away from the bearings, while the CNC-machined AL7075 crown race protects the lower bearings and fork. - AL6061 top cap - Forged stainless steel bolt - Includes star nut

This is the Top Cover for the Cane Creek 40 Series ZeroStack headset. Please contact us if you have any questions about which parts are correct for your headset.

ABI Headset Bearing for new builds or replacements.

Replacement headset bearings from FSA. - Compatible with most Trek MTB integrated headset systems - Sealed bearing for long life - Compatible with Knock Block Headsets

Box Two™ Integrated Headsets feature an aluminum compression cap, CNC-machined bearing cover, and split crown race with super-smooth rolling, precision 45x45 bearings. FEATURES - Precision Sealed Bearings COMPATIBILITY - Box One X2 Fork - Box One XL Fork - Box One Stem Lock - Frames with an Integrated NON-Tapered Head Tube

ABI Headset Bearing for new builds or replacements. - Enduro Headset Bearing ACB 4545 137 Stainless 37 x 46.85 x 7 mm: 45 x 45

- No. series headsets offer excellent performance and value - No. 8b: 36x45 degree Cane Creek Integrated, or No. 10: Zero Stack shallow available for 1-1/8" applications - No. 10 S.H.I.S.: ZS44/28.6|ZS44/30 - No. 8B S.H.I.S.: IS42/28.6|IS42/30 - Stack: 5.2mm/3.7mm (No. 10), 8mm/1mm (No. 8B) - Color: Black - Weight: 93g (No. 10), 74g (No. 8B)

The CroMo Ritchey Comp Cartridge Press Fit Lower Headset features full complement stainless steel angular contact titanium-coated, sealed cartridge bearings packed with Ritchey high-webbing grease. - Material: CroMo - Bearing: Ti coated, sealed cartridge - Weight: 40-52g

Designed for bicycles with press-fit headsets, the WCS Press Fit Upper Headset features full complement stainless steel angular contact cartridge bearings packed with Ritchey high-webbing grease and corrosion-resistant Ti-coated bearings. - Top cap: 7.3 or 12.4mm - Material: Alloy - Upper Fit (S.H.I.S.): ZS44/28.6 - Upper HT OD/ID: 50/44 - Bearing: Sealed cartridge, Ti-coated - Weight: 43g (7.3mm), 49g (12.4mm)

For bikes featuring integrated headsets (such as the Ritchey Road Logic and Swiss Cross), the WCS Drop In Integrated Headset stands above all others. This carbon fiber beauty features full-complement stainless steel angular contact cartridge bearings packed with Ritchey high-webbing grease. - Top cap: 8.3mm - Material: Alloy - Upper Fit (S.H.I.S.): IS42/28.6 - Upper Bearing OD: 41.8 - Top Cover OD: 46mm - Bearing: Sealed cartridge, Ti-coated - Weight: 36g

Bringing Ritchey's heritage of legendary cycling products into the world of e-bikes and electronic shifting, Tom Ritchey designed a unique headset that allows the cables to be run internally from the stem into standard frames without requiring the frame or fork to be modified. The Logic-E headset is designed to allow Shimano Di2 and STEPS cables to be concealed from view and the wind while protecting them from damage. - Steerer size: 1-1/8" upper - Drop-in (IS) or Press-Fit (S) - Weight: 35-44g