Low Stack Internal Cable Routing Headset Adapter for Time and De Rosa Bikes

Why do you want it?

You seeking a lower-stack solution (~5mm-6mm) for your Time (ADHX / ADHX 45 / Alpe D'Huez) or De Rosa (Merak, Idol, 838, Spider).

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

What is it?

This part is a set of parts from my general headset collection modified to have a 56mm OD to match the 56mm OD headtubes used by these bikes.

There are currently three versions of this Part. The FSA / Vision ACR version allows you to use FSA ACR split spacers or transition spacers for the FSA / Vision ACR system. The FSA  / Vision Direct Fit SMR version will enable you to use the FSA  / Vision SMR and SMR-II stems mounted directly and slammed for a low stack height and streamlined look. The Enve version is designed only for use with the Enve InRoute system.

If you are ordering the FSA / Vision ACR version you can purchase the following adapters:

• 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
• 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

This system must be used with a Deda DCR compression ring. If you indicate that you are using an FSA headset, a compression ring from Deda is included. We will follow up with you to confirm the fitment as there are currently both 36/45 and 45/45 degree bearings used in FSA headsets.

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. Custom orders may take up to 4 weeks depending on the sourcing of parts needed to complete the design. Bulk discounts are available, please message / email for more information.