Low Stack Internal Cable Routing Headset Adapter / Dustcover for Trek Emonda ALR / Trek Domane Gen 4 |

Why do you want it?

You are seeking a lower-stack solution (~8 mm - 9 mm) that cleans up the existing through-the-headset cable routing on your Trek Emonda ALR (2023+) or Trek Domane (Gen IV) SL, SLR, RSL, or ALR, while using the parts referenced in the Trek Service Manuals.

You want to use a FSA / Vision, Specialized Tarmac SL7, Kalloy Uno, Enve In-Route or EXS stem / barstem on your Trek while keeping the cables neatly tucked away.

These products are best suited for use with electronic drivetrains. 

What is it?

There are currently SIX versions of this Part.

1. The FSA / Vision ACR version allows you to use FSA ACR split spacers or transition spacers for the FSA / Vision ACR system.
2. The FSA  / Vision Direct Fit SMR version will enable you to use the FSA  / Vision SMR or SMR-II stems mounted directly and slammed for a low stack height and streamlined look.
3. The Enve version is designed only for use with the Enve InRoute system and is compatible with Enve split spacers.
4. The EXS version is designed only to work with the EXS one piece barstem. EXS spacers can be used between the headset cover and transition spacer.
5. The Tavelo Avro / Rise version can be used with the Tavelo Avro Gen-1, Avro Gravel, and Rise handlebars. It can use Tavelo spacers.
6. The 2-Hole version only has room for  2 hydraulic hoses. It is also the lowest version that can be used with a standard -17-degree stem. It has a height of 4-5mm and can be used with regular round spacers.

In order to work, this part requires the Trek Domane MKIV Headset Split Ring (Part # W5274269). That split ring is listed as the service part for the Emonda ALR in the current service manual, but may not be included with that bike and can be purchased separately from your Trek dealer or via this link: https://www.trekbikes.com/us/en_US/equipment/cycling-components/bike-headsets/trek-domane-mkiv-headset-split-ring/p/W5274269/

If you are ordering the FSA / Vision ACR version, you can purchase the following adapters for additional routing options:

• My version of these FSA ACR or FSA SMR internal routing adapters that pass hose nuts and hydraulic couplers, those products are listed here: https://aprotobike.com/products/fsa-ns-acr-or-smr-adapters-transition-spacers
• Low Stack hose tray kits for partially external use with the FSA / Vision SMR stems are available here: https://aprotobike.com/products/smr-stem-low-stack-hose-guide-for-hydraulic-couplers and https://aproto.myshopify.com/products/smr-stem-low-stack-hose-guide
• Adapters for the Kalloy Uno stems are available here:  https://aprotobike.com/products/kalloy-uno-to-fsa-acr-system-internal-routing-adapter-transition-spacer
• Adapters for the Zipp Service Course SL / Service Course stems are available here: https://aprotobike.com/products/transition-spacer-adapter-zipp-service-course-service-course-sl-to-fsa-acr-system-internal-routing
• Adapters for the Deda Superbox stem are available here: https://aprotobike.com/products/transition-spacers-adapters-deda-superbox-to-fsa-acr
• Adapters for the Tavelo Avro bar stem are available here: https://aprotobike.com/products/transition-spacers-adapters-tavelo-avro-to-acr
• Adapter kits for the Specialized Tarmac SL7 / SL8 stem are available here: https://aprotobike.com/products/transition-spacer-adapter-for-specialized-s-works-tarmac-sl7-sl8-stem-to-fsa-acr-system-internal-routing

Please message me to discuss options to fit other stems, custom dimensions, custom integration for stems, etc.

How is it Made?

These parts are printed in the USA on Commercial Grade HP Multi-Jet Fusion machines. Parts, like these, designed to hold preload are made using PA12GB. While this material costs over 2x more than traditional PA12 Nylon, the addition of the glass increases its strength under compression by 80% and in this application, eliminates creep. Given that SLS and MJF printed nylons are only 60%-70% of the density of the high-pressure injection-molded parts made by OEMs, this assures OEM level performance.

This part must be properly installed and the headset preloaded to manufacturer specifications.

Stems, bikes, Headset Split Ring, etc. not included.

Part is guaranteed to fit. If not, you will either be eligible for refund or remakes until this part fits.

If you select a custom stem adapter, please message me with details before ordering.

Note: Items are produced when ordered and have a 4-10 day lead time. Bulk discounts are available, please message / email for more information.