Both the front and rear hub spacing are bicycle frame and/or fork specific. The front hub width measurement is directly related to the spacing between your fork dropouts. The frame measurement is also related to the spacing of the frame dropout width. Oftentimes the hub spacing can simply be measured (in millimeters) from the fork or frame, or referenced on the bike/fork manufacturer’s website. Keep in mind that hub spacing can be model year/generation specific, so the 2017 model may have a different hub configuration than the 2018 model. For any questions related to wheel or hub specifications, please refer to your local bike shop or the Industry Nine Service Department at (828) 210-5113 or at www.industrynine.com
Hub endcaps can be classified into two categories and are bike frame/fork dependent: (1) QR (quick release) and (2) thru-axle. The majority of high end, modern bikes now are built with thru-axles. Thru-axle dimensions are typically measured in axle diameter (mm) x axle width (mm). If your hub skewer can be dis-assembled easily and has small conical springs, it is a QR type. Thru-axles and skewers are not included with wheels or hubs.
Endcap dimensions correlate directly with hubshell width. Below are some common fitments and their corresponding thru-axle configurations:
The cassette that you plan on mounting to your rear i9 hub determines the freehub type. For any questions refer to your local bike shop or the cassette manufacturer. A guide for common mountain cassette types can be found below. Please note, other brands such as TRP, E13, Suntour, etc. use common FH compatibilities, please refer to your owners manual for more information.
|Cassette Type (Mountain)||Industry Nine freehub compatibility|
|Shimano 12 speed||Micro Spline (MS)|
|Shimano 7-11 speed||HG|
|SRAM GX, X01, XX1, Eagle + SRAM “XG-” cassettes||XD|
|SRAM NX + all other SRAM “PG-” cassettes||HG|
|Single Speed cogs (use with spacer kit, not incl.)||HG|
Rotor Identification text: Disc brake rotors are offered in two mounting interface options: (1) 6 bolt and (2) Center Lock. The rotor style is easily distinguished by how the brake rotor mounts to the hub. 6 bolt rotors are fastened to the hub with 6 separate bolts, whereas center lock rotors use a central lockring and require a bottom bracket tool (for 15mm/20mm thru-axles) or cassette lockring tool (for 12mm thru axle or QR style). Bolts and lockings are not included with wheels or hubs.
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