Head tube outside diameter must be 54mm or less. Using a Vernier Caliper is the recommended way to make this measurement.
We recommend using with a frame that uses a press-in headset top cup. This will prevent any compatibility issues from using the G1 with different gyro tabs.
If your frame does not use a press in top cup, you can use gyro tabs that line up with the bottom of the small G1 (69mm) however, gyro tabs are not included and may need to be customized to align with the width of the bottom of the gyro.
Steer tube must have 20mm of extra length
SIZE LARGE
Head tube outside diameter must be 54mm or greater. Using a Vernier Caliper is the recommended way to make this measurement.
We recommend using with a frame that uses a press-in headset top cup. This will prevent any compatibility issues from using the G1 with different gyro tabs.
If your frame does not use a press in top cup, you can use gyro tabs that line up with the bottom of the large G1 (74mm) however, gyro tabs are not included and may need to be customized to align with the width of the bottom of the gyro.
Steer tube must have 20mm of extra length
FEATURES
MTB specific gyro
6061 T6 machined aluminum
Low friction / high wear resistance machined delrin bushing
Two sizes available (dependent on outside diameter of head tube)
Available as a full system or gyro only
INTENDED USE
Dirt Jump / Slopestyle
Skatepark / Street
RECOMMENDATIONS
To ensure proper installation, watch our G1 gyro set up video
Recommended use of G1 cables and G1 lever for best set up
Keep bushing lightly lubricated
Have installed by a professional
Need help choosing the right product?
Our team of riders and experts will be pleased to help you.
Specs
Size
Metric
Imperial
This is a size chart.
Geo
Metric
Imperial
Geometry of this bike.
Reach
Horizontal measurement taken from the middle of the bottom backet to the middle of the headtube.
Stack
Vertical measurement taken from the middle of the bottom bracket to the middle of the headtube.
Effective Top Tube
Horizontal measurement taken from the middle of the seatube to the middle of the headtube.
Actual Top Tube
True length of the top tube taken from the seatube along the toptup to the headtube.
Standover Height
Vertical measurement taken from the ground to the the middle of toptube.
Seat Tube Angle
Angle of the seatube.
Seat Tube Length
Lenght of the seat tube taken from the bottom bracket to the top of the seat tube (the measure is taken alongside the seat tube)
Headtube Angle
Angle of the headtube.
Headtube
Vertical lenght of the headtube.
Chainstay
Horizontal measurement taken from rear axle to the bottom bracket.
Wheelbase
Horizontal measurement between the two wheel axles.
BB Height
Vertical measurement taken from the ground to the bottom bracket (Never taken at sag).
BB Drop
Vertical measurement between the height of the axles and the height of the bottom bracket.