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Old 04-11-2008, 07:31 AM   #1
Marc Miller
Birel & Rotax Specialist
Join Date: Jan 2008
Posts: 850
Default TECH: Freeline Axle Chart

The link below is to the Freeline Axle Modulus chart.


Here is how to read the model #:

Axle diameter in millameters (mm) x Axle Thickness (mm) x Axle Length (mm) + Letter CODE

Example: 40x2.5x1040F = 40mm axle, 2.5mm thick, 1040mm in length w/ an F rated modulus.

The lower the modulus, the "softer" the axle is.

For the 50mm axle range - Letter Code goes from softest to stiffest in this order: S, B, D, F, M, K
Marc Miller
Director of Brand Development
MRP Motorsport/Birel
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