20mm E-thru axle type.FRONT HUB: The new front hub carries over the 20mm through axle for maximum control and minimum weight. Angular contact bearings ensure easy maintenance and total efficiency. The new shape is visually lighter and incorporates the standard Center Lock interface which allows easy interchangeability with other rotors or the use of a 6-bolt rotor adapter.
20mm thru axle design: Improves steering and balances suspension response.
Center Lock: For easy rotor interchangeability and a lighter hub shell.
Angular Contact Bearings: Balances destructive loads from any direction.
Superior Sealing: Labyrinth and lip seals increase sealing by 400%.
Series: SAINT
Disc Rotor Mount: Center Lock
Axle Type: 20mm Thru Axle (SM-AX80)
Axle Length: 110mm
Axle Diameter -
Axle Material -
Stainless Steel Ball Bearings: stainless steel
Cone Races: Cubic Boron Nitride
Cup Races: Cubic Boron Nitride
Contact Sealing: Double
Spoke Holes: 32/36 holes
Spoke Hole Circle: 61.6mm
Hub Shell: aluminum/anodized
Center to Flange (Right): 36.4mm
Center to Flange (Left): 25.2mm
Average Weight: 225g
Require Shimano Tool TL-FC36 to lock the disc lock ring which is same size as HollowTech II BB tool, you may use the BB tool Shimano TL-FC32
, or Park Tool BBT-9 
which is more practical and cost effective.Park Tool BBB-2 The Big Blue Book of Bicycle Repair - 2nd Edition
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