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Aerozine forges new XEN MTB cranks ‘for those who want the strongest’

Aerozine, XEN O1 crankset with Ovality ring
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Late last year, we checked out some unique cranks, BBs & chainrings that Aerozine had shared back at the tradeshows. Now the Taiwanese company is back, adding two new hollow forged aluminum mountain bike cranks to their catalogue – the XEN A1 and XEN O1.

Aerozine XEN A1 & O1 alloy mountain bike cranksets

Aerozine XEN crankset, on bike

Aerozine calls these cranks “suitable for those who want the strongest”, intended to handle everything from XC to DH riding. Between the two models the crank arms and spindle are the same, the key difference being that the A1 comes equipped with round chainrings, while the O1 model features oval rings.

Xen Tech Details

Aerozine ALS pedal boss inserts

Probably the most interesting part of the XEN’s hollow-forged, then CNC-machined 7075 aluminum crank arms is their adjustable crank length. Aerozine’s ALS (Adjustable Length System) uses pedal boss inserts that can be flipped to allow for 5mm adjustments. Between the inserts and a few different crank arm lengths these cranks should fit just about any adult rider, plus some junior-sized bikes too. Crank arms are offered in 155/160, 160/165, 165/170, 172.5 & 170/175mm options.

Aerozine XEN A1 crankset, full

Aerozine also gives you two options for your chainring interface. The XEN cranks can host direct-mount chainrings, or can also run a Shimano-standard asymmetric 4-bolt BCD96/64 spider. Aerozine’s round or oval chainrings are made from CNC machined 7075 aluminum. What Aerozine calls ‘Spider Rings’ (what would be better described as spiderless/direct mount) are available in two-tooth increments ranging from 28-40t. For the O1 cranks, their Ovality Spider Rings are offered in the same sizes.

Aerozine, XEN crank arms and Way Point Axle

Aerozine’s 30mm aluminum ‘Way-Point Axles’ (spindles) come i three lengths to fit 142, 148 & 157mm spaced rear ends. To ensure a snug fit on your BB shell, these spindles can adjust up to 2.5mm in width without using a wave washer or similar gadget.

Aerozine XEN crankset, BSA30 HS bottom bracket
*Photos c. Aerozine

The XEN cranksets come with Aerozine’s BSA-30-HS threaded bottom bracket, but they’re also compatible with their PF30 and PF4130 press-fit BB’s. With strength as the main goal, the XEN crank arms set weigh in at 559g. The A1 and O1 cranks are available in three colors: Blast Black, Blast Gold & Blast Blue. Included chainrings come in Black only.

Aerozine XEN crank arm, BlackAerozine XEN crank arm, GoldAerozine XEN crank arm, Blue

Pricing for the XEN A1 or XEN O1 crankset ranges from $414-428, and are available online now.


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5 years ago

You say “adjustable spindle length.” You mean adjustable crank arm length.

5 years ago
Reply to  mudrock

It looks like it has both, mudrock. I see the arm length adjustment shims, but the spindle design also allows for a few different chainline setups.

Cory Benson
5 years ago
Reply to  dockboy

Both of you are correct. But, yes.. ‘adjustable’ crank arm length and ‘interchangeable’ bottom bracket spindle widths.

5 years ago
Reply to  Cory Benson

It says the spndle is available in three different lengths (142 148 and 157mm) and each is individually adjustable by up to 2.5mm to allow for correct bearing preload without the use a wave washer or similar widget.

Crank arm length is adjustable between two lengths
Crank Axle(spindle) length is adjustable by 2.5mm
Crank axle is available in three overall lengths (142mm, 148mm and 157mm)

Read the article boys. Don’t scan while looking for an opportunity to shoot holes in the message

Andrew Fleming
Andrew Fleming
5 years ago

No 180mm crank length option? Damn it!

5 years ago
Reply to  Andrew Fleming

fat bikes are dead….

Did you know that cannondale has stopped making tandems?

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