Uploaded July 2021 | Updated September 2026, 2 hours ago

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The Koozer XM490 is one of the few 141mm QR Boost hubs available for bikes such as the Schwinn Axum and the Trek Roscoe which both use this uncommon rear wheel spacing. At the time of this video it was available on Amazon for $85.
Koozer 141mm QR Hub: amzn.to/3BhYFeC
Digital caliper: amzn.to/36Pfe3R
Measurements:
OLD = 141mm
PCD = 58mm
Flange to flange = 61mm measured (not 60 like I say in the video)
Left flange to locknut = 34mm
Right flange to locknut = 47mm
Right flange to center = 36.5mm
Left flange to center = 23.5mm
*I recommend you verify these measurements with your hub and am not responsible for any errors.

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