GSI AH100 Hub Extension

The GSI AH100 is a hub extension that moves your steering wheel 100mm closer to you. It is for sim racers who need to dial in reach without giving up stiffness or fitment.

Why it matters

• Better ergonomics: the rim comes closer, so you can sit in a more natural driving position.
• No flex: the joint stays rigid, so force feedback comes through clean and consistent.
• Wide fit: it suits the many wheelbases and wheels built on a 70mm PCD.
• Light: the aluminum body adds reach, not extra weight.
• Your color: several anodized finishes let you match the rest of your setup.

Who it is for

Any driver, at any skill level, who wants to fine-tune seating position for comfort and control. It suits fixed rigs, deep seating positions and formula-style cockpits, where reach and spacing are critical. It also makes sense on high-torque direct drive bases, where rigidity and alignment matter most.

How it is built

GSI machines the AH100 from billet 6061 aluminum, so it keeps its strength under load. Both faces use the standard 70mm pitch circle diameter. One face has threaded holes and the other has plain holes, which covers a wide range of mounting combinations. Every unit is anodized for durability.

On the rig

If your wheelbase sits too far forward, the extra 100mm puts the rim where your hands want it. That eases strain on your arms and shoulders and gives you more leverage and control. The hub stays solid under load, so you still feel the full detail and strength of a direct drive base. You get exact positioning with no loss in performance.

Key specs

• Extension length: 100mm
• Material: billet 6061 aluminum, anodized
• Bolt pattern: 70mm PCD, both faces
• Holes: threaded on one face, non-threaded on the other
• Weight: 0.16 kg
• Hardware: six M5 x 12mm mounting screws included
• Colors: Black, Red, Green, Blue, Gold, Purple