Gilles ACMA steering stem nut for BMW S1000RR, black⟲ 360° — drag me
02 · Data & docs

The facts.

Technical data
BrandGilles Tooling
SeriesACMA
Part numberACMA-28-10.b (black), ACMA-28-10.bl (blue), ACMA-28-10.r (red)
TypeSteering stem nut for the top yoke
ThreadM28 x 1.0
MaterialAluminium 7075, anodised
LockingPatented pin-interlock anti-twist lock
UseSteering head only, not for wheel or swingarm axles
FitmentBMW S1000RR (2015–2026)
Road approvalNot required (Gilles)
DescriptionThe whole story▼

On a superbike, the top yoke is the last thing the rider sees before tucking in and the first thing after sitting up again. The S 1000 RR has been through five type designations since 2015, yet its steering stem nut has always been a plain part in a very deliberate cockpit. The Gilles ACMA replaces it.

Key Features

  • M28 x 1.0 thread
  • Not for rear wheel or swingarm axles (Gilles)
  • Designed exclusively as a steering head nut
  • Aluminium 7075, anodised
  • Patented pin-interlock anti-twist lock, taken over from the ACM axle nut
  • No registration required, according to Gilles

K10 to SR99

Gilles lists the ACMA for every S 1000 RR from the K10 of 2015 to the SR99 from 2025. On track-day bikes that get stripped and rebuilt through the season, the nut is one of the parts a mechanic handles often, and a coloured one is easy to spot on the bench.

Road Approval

According to Gilles, the ACMA steering stem nut needs no approval on the BMW S1000RR. Nothing changes in the papers; tighten it to the manufacturer's value for the steering stem nut.

Scope of Delivery

One ACMA-28-10 steering stem nut in your chosen colour.

Fitting

After fitting, turn the handlebar from lock to lock and rock the fork with the front brake applied: no play, no tight spots. If anything feels different from before, have the steering head checked.

Specifications

  • Brand: Gilles Tooling
  • Series: ACMA
  • Part number: ACMA-28-10.b (black), ACMA-28-10.bl (blue), ACMA-28-10.r (red)
  • Type: Steering stem nut for the top yoke
  • Thread: M28 x 1.0
  • Material: Aluminium 7075, anodised
  • Locking: Patented pin-interlock anti-twist lock
  • Use: Steering head only, not for wheel or swingarm axles
  • Fitment: BMW S1000RR (2015–2026)
  • Road approval: Not required (Gilles)
What's includedEverything in the box▼
  • 1x Gilles ACMA steering stem nut M28 x 1.0 (colour as selected)
FitmentWhich bikes this fits▼
  • BMW S1000RR (2015–2026)
07 · Support

Questions, one topic at a time.

Estimate your shipping

Get the real shipping cost for this item to your address — the same rates as checkout.

Pick your countrySame rates as checkout

Choose a destination and hit Estimate — we fetch the live rates for this item.

How long does delivery take?

We’re based in Germany. Standard delivery goes by DHL and national postal services and takes about 2–5 days within Germany, 1–2 weeks within the EU and 2–6 weeks outside the EU. Need it sooner? Express delivery reaches most of the world within a few days — just choose it at checkout where available.

How much does shipping cost?

Your exact shipping cost is calculated by destination and weight and shown at checkout before you pay — no hidden fees. Express delivery is selectable at checkout where available.

Do you ship to my country?

Yes, we ship to over 130 countries. Prices, taxes and delivery times for your destination are calculated automatically at checkout.

Will I have to pay customs or import duties?

Within the EU, no — our prices already include all duties and EU VAT. For deliveries outside the EU (e.g. Switzerland, the UK or the USA), your order may be subject to import duties and taxes set by your country. These are collected by the carrier when your parcel arrives, aren’t included in our prices, and are outside our control.

How can I track my order?

As soon as your parcel ships we email you a tracking link, so you can follow it all the way to your door.

What if an item is out of stock?

On out-of-stock items you can request a delivery time or leave your email to be notified the moment it returns — just use the notification box on the product.

Didn’t find your answer?

Our team will personally help you choose the right gear or part — around 24h for a reply.