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Carbon Wasp 3D Prints Titanium Cranks for Pinion Gearboxes

carbon wasp titanium crank arms for pinion gearbox
7 Comments

Got a bike with the Pinion Gearbox behind your cranks? The new Carbon Wasp 3D-printed titanium crank arms will drop 170g off the original aluminum ones, and look good doing it.

The brand has made carbon fiber cranks for Pinion units in the past. Those were light, but always required some sort of metal insert to pinch clamp onto the spindle, which is part of the gearbox. That metal part was tricky to machine because of its intricate spline interface, too.

carbon wasp titanium crank arms for pinion gearbox

But 3D printing it, that could be easy, and done with titanium. As they experimented, they found they could print an entire hollow ti crankarm that was as light as anything they could make out of carbon. They admit, a full metal part is a bit off brand, but it’s a better part, so they went with it.

carbon wasp titanium crank arms for pinion gearbox

The two crank arms weigh in at a combined ~280g, which is 170g lighter than stock. They come in 165/170/175mm lengths for $804, or get a custom length and/or Q-factor for $866, letting you fit your body, fat bikes, etc.

CarbonWasp.com

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7 Comments
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G-Bike
G-Bike
5 months ago

What a bummer they only work with their gear box. They wont fit any other bike…

Sevo
Sevo
5 months ago

Whats the stock Q factor though? Think the creep towards unnecessarily wide Q factor cranks needs to be addressed. When MTB cranks are up to 165-170mm when thats what a cheap melt forge crank on a $300 bike once was we have a problem

duck e.
5 months ago
Reply to  Sevo

The q factor on stock Pinion CNC cranks for the C-line drivetrain (what most people will use) is 167mm. I own one, not sure it’ll get much narrower. Anything fat will be wider of course, and at that point they’re probably put a P-line box on it with 175mm q factor.

Generally, the wide Q factor is necessary to accommodate the larger and larger tires we’re seeing on MTBs.

Oliver
Oliver
5 months ago

Those are really light given their intended use. Hopefully they’ll offer some XC and Road / Gravel ones.

Billyshoo
Billyshoo
5 months ago

Those are glorious.

John
John
5 months ago

Pinion geaboxes are heavy and going to Ti cranks aren’t going to save that much weight and at that cost. I have an Pinion gearbox and I wouldn’t think of trying to save a .3 of a pound.

Umaface
Umaface
3 months ago
Reply to  John

I have a Pinion fatbike, but hate that it came with 175mm cranks.
They are presently the only available option for fatbike.

I had emailed everyone and anyone who makes cranks, if someone was going to make shorter Pinion fatbike cranks, with no luck.

I emailed Adrian, at Carbon Wasp, to see if he would make me some shorter carbon ones, even though I really didn’t want carbon.
Just trying to find shorter cranks.

Fast forward a year, Adrian emailed me about these.
Right away, I ordered some custom 160mm Pinion fatbike cranks.

I’ve been running 165mm for 8 years now, on other bikes, and decided to go slightly shorter for my 4 season fatbike.
After 2 weeks with these, no after ride knee throbbing.

Now, the Pinion fatbike is my favorite bike.

So grateful that there’s companies like Carbon Wasp, willing to make niche parts like these and the fact that Adrian remembered a year later that I was looking for them blew me away.
Appreciate Adrian so much!

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