Stem Alpha Pro SDS

Stem Alpha Pro SDS

Ab 88.95 €

MSRP from 88,95€

· 1 ⅛” A-Head stem

· With SDS front cap for SDS links / adapter

· Angle adjustable from -10° to +50°.

· Handlebar clamping ø 31,8 or 35mm

· Robust toothing in the adjustable joint

· Suitable for MTB / Cross Country use

· Required min. fork shaft protrusion approx. 58 mm

SKU: o. A. - Button "Produkt kaufen" ist eine Weiterleitung zu unserem offiziellen Webshop! Category:


Designed for (e)-city / trekking bikers, this 1 ⅛” A-head stem is part of the new Alpha series, which sets accents with its own design language. The Alpha Pro is angle adjustable over a wide range from -10° to 50°, with the robust adjustment joint standing out. Ideal for individually adjusting the stem angle and handlebar height to relieve strain on the arms and neck. The play-free adjustment of the headset works without the usual A-head star nut. The integrated fixing ring allows the stem to be rotated 90° to the left and right to transport the bike in a space-saving manner without adversely affecting the headset adjustment. Thanks to its heavy-duty forged construction, the Alpha Pro is also suitable for cargobikes. The Alpha Pro allows hidden cable routing through the stem, as well as the installation of a navigation system or lamp via the SDS system.

Tech. Data

  • Material : Aluminium AL-6061-T6, 3D forged
  • Colour : Black anodized
  • Handlebar clamping : ø 31,8 or ø 35 mm
  • Lengths : 65 – 110 mm
  • Angle : From -10° to +50° (in 10° steps)
  • Weight : Approx. 470 g at 110 mm length
  • Scope of delivery : Stem Alpha Pro SDS Super Strong and manual

Assembly Instructions

View here >>

Installation Requirements

· A-Head metal fork shaft 1 1/8“ (threadless); outer diameter 28,6 mm.
Using the stem with a carbon fork shaft is strongly not recommended.

· The minimum fork shaft protrusion must be at least 58 mm.

· A maximum of 40 mm spacers / risers may be installed beneath the stem.

· No A-head claw is required in the fork shaft.

· The threadless fork shaft should be shortened to the correct size. When cutting, make sure that the fork shaft end still has an outer diameter of 28.6 mm and is fully deburred.

· If necessary, the correct fork shaft protrusion can be achieved by placing suitable spacers / risers underneath.

· The brake and shift cables, as well as electrical cable connections to the handlebars, must be of sufficient length so that they are free of sharp kinks when adjusting the angle and twisting function, and do not obstruct the steering in any way.

· Handlebars and stem must be compatible with each other and must have the same clamp diameter of 31.8 mm or 35 mm. Carbon handlebars must not be mounted!

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