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The Absolute Best
Need help choosing the right headset? Read this: Everything You Need to Know About Headsets
We invented the modern headset in 1992 with the Aheadset and the 110 series is a continuation of that legacy of precision, craftsmanship and performance.
We know the 110 headsets are the best in the world, and we want to make sure that they have the best guarantee in the world.
The Hellbender bearings are built to live in the most extreme conditions, keeping you riding smoothly through rain, mud, grit or whatever the road and trail throws at you. Using Stainless Steel bearings and advanced sealing elements.
Our patented Interlok spacer design provides solid interface between the top cover and spacer stack, meaning they “nest” together and into the top of the bearing cover, which helps minimize shifting under load while riding; and shave 25% in weight off a standard alloy spacer stack. Spacers sold separately
The 110-Series offers the widest array of configurations available in a premium headset. With over 26 straight and tapered combinations, whatever your headset requirement, we have a premium solution for you, backed by our lifetime guarantee and superior customer service.
In 1992, we brought the Aheadset®, the original threadless headset, to market – kicking off a major change in the way bicycle frames and forks would be developed going forward.
The original design of that revolutionary headset is still found in almost all bikes on the market today.
| Cups and Covers | 7075 T-6 Aluminum, Internally contoured and relieved to minimize weight and maximize strength. |
|---|---|
| Covers | Low-friction upper bearing seal completely seals cup from contaminants and is fully captured by the top cover with no loose parts |
| Crown Race | Dual-Seal crown race provides excellent seal efficiency with low friction |
| Bearings | Premium, sealed stainless-steel HELLBENDER bearings EC34 will take a 41mm bearing All complete Cane Creek headset assemblies (top or bottom) will use a 36×45 degree contact angle bearing, with the exception of our IS47/33 and EC44/33 headset assemblies. IS47/33 and EC44/33 will use a 45×45 degree contact angle bearing. |
| Interlok® | Interlok® spacer compatible |
| Warranty | 100% Lifetime Guarantee – Including bearings |
| Stack Heights | External Cup (EC) — 16mm top, 12mm bottom, ZeroStack (ZS) — 8mm or 15mm top, 4mm bottom, Integrated (IS) — 9mm or 15mm top, 1mm bottom |
Our curent part numbers for 41mm bearings are below:
41mm Zn40 Zinc coated steel bearings: BAA1130
41mm Hellbender stainless steel bearings: BAA1054
Your Cruz S40 uses the EC34 Viscoset. The ViscoSet is a top headset design so you only need to replace the top headset. Our 110 Series part number: BAA0165K
Yes our bearings should work but you may require some IS shim spacers for the upper headset since our bearing heights are not exactly the same.
Your 2023 Trek Roscoe appears to be using an integrated headset...IS41 Top and IS52/40 Bottom. Most Trek models are using this size so our part number in the 110 series is BAA0768K
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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.
Got more questions? Want to know what size bearing you need? Check the Headset FAQ here.
Verified OwnerWhat can you say other than this is the best! Jewels for the bike yes- but they last so long and run so smooth its well worth it!
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Verified OwnerWhat can you say other than this is the best! Jewels for the bike yes- but they last so long and run so smooth its well worth it!
Verified review - view original
Verified OwnerAbsolutely solid headset! Bulletproof, smooth, and no play!
Verified review - view original
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