A custom titanium stem machined to your exact length and angle — for riders who want a fit the standard 10mm-step sizing can't quite hit.
SKU: AUR-STEM-CUSTOM
Secure checkout · Apple Pay · Card
Custom Product Lead Time: 4 months.
Have a question before you buy?
Rather than choosing from a fixed set of stock lengths, tell us your exact target length and angle — from a bike fit, from measuring your current stem, or from a fitter's recommendation — and we machine to that figure directly. This is the way to dial in a fit that off-the-shelf sizing, even in fine increments, can't always hit exactly.
An aerospace-grade titanium alloy. It flexes just enough to absorb high-frequency road and trail vibration before it reaches your hands, so the front end stays comfortable on long or rough rides. It also doesn't rust or corrode, and resists the fatigue cracking that ends the life of aluminium stems.
The titanium is anodised, a surface treatment that hardens the outer layer for added scratch and wear resistance and gives a clean, consistent finish. Unlike paint it won't chip or flake. It's protective and cosmetic rather than structural.
Three things decide fit: your fork’s steerer diameter, your handlebar’s clamp diameter, and the exact length/angle you tell us.
1 1/8″ (28.6mm) → standard fit for this stem
31.8mm → standard fit for this stem
Machined to your exact figure — tell us what you need, no fixed increments
If your fork uses a different steerer diameter, or your bars use a clamp size other than 31.8mm, get in touch before ordering or reach out to Will — we can advise or build to spec.
Tools needed: torque wrench, the hex/Allen keys that match your stem bolts, titanium-friendly grease (or carbon assembly paste if you're clamping a carbon bar or steerer)
Slide the stem onto the fork steerer and set your spacer stack and bar height. Leave the steerer cap and clamp bolts loose for now.
Lightly grease the steerer clamp bolts, or use carbon assembly paste on a carbon steerer.
Fit the handlebar into the clamp, centre it, and start all face-plate bolts by hand to avoid cross-threading.
Set the headset preload with the top cap before tightening the steerer clamp bolts.
Tighten the steerer clamp bolts evenly to 5 Nm.
Tighten the face-plate bolts evenly in a cross pattern to 5 Nm, keeping an even gap top and bottom.
Check bar and stem alignment, then confirm every bolt is torqued to 5 Nm.
Auren designs and builds in Melbourne. One workshop, one builder, frames made by the person you can actually reach.
Every Auren titanium bike comes out of a simple idea. Founder and engineer Will Young wanted to build custom titanium the way it should be done: a frame shaped around the rider, not picked from a range. Your geometry, your parts, your bike, designed with you from the first conversation to the final build.
Building direct means there's no dealer between you and us. When you're planning a build, talking through your fit, or need something sorted years down the track, you talk to Will, the person who made the bike. Every Auren titanium is built to last decades and backed by real support that doesn't disappear after delivery.
That's reflected in our reviews: five stars across Google and Trustpilot.
Not sure something will fit, or which option matches your build? Chat with Will over email or on a call before you order.
info@aurenbikes.com.au Enquire