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Extralite BlackLock Front Thru Axle

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Product Description

With the rising popularity of thru axle designs being used by nearly every major fork and frame manufacturer, companies like Extralite have immediately filled in the niche for quality performance tuned parts that many discerning cyclists desire. With this in mind, Extralite has produced the Black Lock, a surprisingly lightweight thru axle skewer. Utilizing a unique externally tapered surface and precise dimensioning, Extralite is capable of shaving as many grams as possible while still maintaining a sturdy design that’s tough enough to withstand the abuse of a typical mountain bike ride. To ensure proper installation that’s as smooth as possible, each Black Lock comes with a self lubricating brass washer that is designed to reduce friction between the skewer and frame/fork.


The Extralite Black Lock is available in configurations to fit most modern forks:

Model Compatible Forks Total Length Thread Pitch & Length
BlackLock 15.1 DT Swiss XMM29' (Torsion Box models only) 143 mm M15x1.5, 8.7 mm
BlackLock 15.2 DT Swiss XMM29' (All other models) 143 mm M15x1.5, 16.2 mm
BlackLock 15.3 Fox (All Models) 146 mm M14x1.5, 14.2 mm
BlackLock 15.4 RockShox RS1/Sid/Reba 147 mm M15x1.5, 12.2 mm
BlackLock 15.4B RockShox Boost 156 mm M15x1.5, 12.2 mm
BlackLock 15.5 Magura 139 mm M15x1, 11 mm
BlackLock 12.5 Road 12x100 120 mm

M12x1.5, 12.5 mm

BlackLock 12.5A Road 12x100 116 mm

M12x1.5, 12.5 mm

BlackLock 12.5B Road 12x100 125 mm

M12x1.5, 14 mm


Each Black Lock thru axle is installed using a 6 mm allen wrench at a torque rating of 10 Nm. The tool fitting is located on the threaded side of the axle. It is highly recommended that threads are greased prior to installation to ensure a proper torque rating.

Product Specifications

ModelInterfaceLengthThread PitchThread LengthWeight
BlackLock 12.5Flat120mm12x1.512.5mm20g
BlackLock 12.5AFlat116mm12x1.512.5mm19g
BlackLock 12.5BFlat125mm12x1.514mm21g
BlackLock 15.1Flat143mm15x1.58.7mm25g
BlackLock 15.2Flat143mm15x1.516.2mm27g
BlackLock 15.3Flat146mm14x1.514.2mm27g
BlackLock 15.3BFlat156mm14x1.514.2mm28g
BlackLock 15.4Flat147mm15x1.512.2mm27g
BlackLock 15.4BFlat156mm15x1.512.2mm29g
BlackLock 15.5Flat139mm15x111mm27g
Material7075 T6 aluminum
Tool Fitting6 mm allen
Recommended Torque10Nm

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