Park Tool

Frame Alignment Indicator FAI-2

The Park Tool Frame Alignment Indicator FAI-2 is a precision frame alignment gauge designed to verify whether a bicycle frame is straight where it matters most: the head tube, seat tube, and rear dropouts. By quickly identifying misalignment, it helps prevent handling issues that show up as poor tracking on the road or trail and can contribute to inconsistent shifting and drivetrain wear.

Key reasons mechanics reach for the FAI-2

• Multi-point frame checks - Measures alignment at the head tube, seat tube, and rear dropouts to pinpoint where a frame is out of spec
• Better real-world ride quality - Helps confirm the frame is in-line for proper tracking and consistent shifting performance
• Retractable pointer design - Adapts to virtually all frame sizes for fast setup across a wide range of bikes
• Black anodized aluminum construction - Durable, corrosion-resistant build suited to frequent shop use