Teardown
Project 321 Hub Teardown
Project 321
Project 321 is best known as an aftermarket Lefty dealer, a premier Lefty service center and for manufacturing steerer tubes to adapt Cannondale Lefty struts to any mountain bike frame. In the mountain bike realm that is.
The company also machines aftermarket parts for Carroll Shelby International along with their own automotive accessories but a recent relocation from Fresno, California to Bend, Oregon suggests bikes are a lifestyle as much as a business. Who doesn't want to ride out their back door to awesome trails?
P321 has been selling hubs, including popular Lefty front hubs, for a long time but their brand new release is entirely designed and manufactured in-house, with the exception of the Japanese made EZO cartridge bearings.
The company will also be supplying hubs to select rim manufacturers. Tim Coleman is currently testing a set of We Are One carbon wheels using the hubs shown here. By all accounts, the folks at We Are One are particular and there are a number of Gucci hub options they could have chosen.
Options
Every perspective of the Project 321 hubs remind me of something that Pete from North Shore Billet said to me once: "Why machine a straight edge when you can machine a curve?".
When it comes to configurations the options from P321 are almost endless. Almost every variable in ten different anodized colours is available for shells and axles: Black, Blue, Gold, Green, Pink, Orange, Purple, Red, Silver, and Turquoise.
Driver
P321 hubs can be crank-it-to 11 loud or almost silent by swapping between two different sets of magnetic pawls. The loud option comes with a slight increase in drag, but the louder pawl option produces 51% less drag than the previous generation with spring backed pawls. The quiet pawls make for a 68% reduction.
Project 321 recommends only Dumonde Tech Pro X Freehub Oil for lubrication of the pawls and drive ring.
The magnetic pawls with both the loud and quiet options and the high-quality EZO bearings really sealed the deal for us. - Dustin Adams, We Are One
There are actually four freehub driver options. That's XD (SRAM) and HG (Shimano) available in two different pawl setups. Drivers are then available in two different engagement options: 6x2 (6 pawls with 2 pawls engaged at a time) and 6x3 (6 pawls with 3 pawls engaged at a time).
The 6×2 driver yields 1.7° engagement and the 6×3 option yields 2.5°. In theory, the 144 points of engagement from the 6x3 option is robust enough for single speeding Clydesdales.
Watcha Spinnin' On?
"A West Coast capable hub" - Dustin Adams, We Are One
Project 321 offers hubs with Enduro ceramic hybrid bearings (+$100 USD) or high precision EZO Japanese made steel bearings. I find it hard to imagine the hubs spinning any nicer than they do with the EZO setup and my limited experiences with ceramic hybrid bearings have been poor. But, to each their own, options abound and etc.
Usually between Jeff and myself a teardown involves loading up any bearings with heavy water proof grease but he's spent all summer rebuilding Remi and Jesse's hub bearings with light oil and no seals so we split the difference and left the hubs as stock.
It's a very quick job to pull the axle and pop the seals on the most outboard bearings, the ones that most often have performance issues from water ingress, so I'll keep an eye on them with hopes that the tight tolerances, extra oil in the drive system, and the freehub seal keep the water out.
My experience with what initially seemed to be under-sealed True Precision hubs has taught that machining tolerances can vastly improve bearing life in wet conditions.
Up Front
To some extent a front hub is a front hub. The P321 hub has easy to swap but tight-to-remove end caps sealed by o-rings, and the anodizing perfectly matches the rear.
How To
Anyone who has successfully replaced bearings in a hub is fully equipped to tackle a complete teardown on the new Project 321 hubs. All the same the company is currently working on building a repository of How To videos to help guide riders through the ins and outs.
Comments
[user profile deleted]
7 years, 1 month ago
This comment has been removed.
Andrew Major
7 years, 1 month ago
There are no hubs that I know of designed to convert between Boost and non-Boost.
You could use Problem Solvers' Boost kit to make that swap(142->148) but as with the Wolf Tooth kits it isn't a factory solution.
I'd love to see more companies (Chris King, Hope, DT) offering factory front and rear Boost adapter kits for the troves legacy hubs out there. In the case of P321 I imagine the demand for conversions kits would be extremely small since they're a new product.
By design I can't see them getting louder over time other than maybe lube breaking down - and telling me it's time for a clean & lube? I'll report back once I've thrashed them solidly.
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Shoreboy
7 years, 1 month ago
Id love to see legacy adapters too, but its very unlikely to happen. There is no incentive for these companies to offer Boost adapter kits. A new set of hubs is going to earn them alot more $$$ than $50 worth of adapters. Why manufacture something that is going to take away from people buying new and more expensive items from your company? I dont agree with it at all, but it is the sad reality of how the industry seems to function now.
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Andrew Major
7 years, 1 month ago
I know I pick on Chris King a lot on this subject - it's out of love I promise - but on the one hand making an axle & brake spacer kit for legacy hubs is about practicing what they preach from an environmental perspective and company philosophy --- I.E. product you can buy and service forever.
On the other hand, a King axle and brake adapter kit wouldn't be $50. It would probably be closer to $150... per wheel. There's money to be made in supporting legacy product along with the feel good fist-bump of a rider being able to lace their 15-year old King hubs into a fresh set of 30mm wide 29'er hoops and keep ripping along on trend.
It goes without saying I'd love to see Hope, Industry-9, Project 321, True Precision, Onyx and etc who make their own products in house all doing the same.
The nice thing about making products in house is if there is a demand it's really easy to support it by making longer axles and rotor spacers.
With this being a brand new hub I'm sure the business case (~zero demand?) isn't there for P321 to offer such a kit as this time - they make Boost and non-Boost hubs with specific shells/axles. That said, they are offering extensive warranties on the product and I'd guess assuming their hubs will end up surviving at least a couple frames so if enough riders are looking to roll forward their 135/142 hubs to Boost frames maybe they'll consider making their own axle kit?
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bikerider
7 years, 1 month ago
Hope has a rear boost kit listed:
HUB CONVERSION KITS & PART NUMBERS
Rear hub conversion kits:
Pro 2 EVO/Pro 4 Rear Boost Conversion Kit HUB493
It isn't available yet though.
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Andrew Major
7 years, 1 month ago
That's a great find - originally they weren't going to make one.
Of course for Hope, DT and MOST I-9 hubs Wolf Tooth makes awesome kits for Boost conversion.
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awd505
7 years ago
Nice to see Project 321 get press for their high quality, smartly designed hubs.
They have been using Dumonde Tech Freehub Grease for many years for a reason.
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Michael
7 years ago
Running one of these now in the quiet version. Definitely a " where have you been all my life" moment love this hub. I hope it's up to the task long term.
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Andrew Major
7 years ago
So far this one has been a treat - but long term will tell.
I do like that unlike other instant/silent hubs the design is very user serviceable with no special tools needed.
If you want to have it a long time it’s pretty easy to stay on top of maintenance. Dumond Tech freehub grease can be easily ordered in by any shop.
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cyclotoine
6 years, 4 months ago
I have these hubs and got a few skips on the first few rides. I was assured that I got the new pawls made in the USA... they rarely skip not but every couple rides they still do. I'm going to open them up soon to have a look. As you say, this shouldn't be happening with such an expensive hub. My question is this, in the photos, it looks more like grease than oil on the hub. What am I seeing? Is this the "slurry" of Slickoleum and Dumontech that you mention in your review article?
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Andrew Major
6 years, 4 months ago
Apologies for the confusion there, these photos are still of the Dumondetech grease. I’ve not photographed the guts with freehub oil.
Have you contacted Project 321? If you already swapped to oil it’s possible that the ringdrive was damaged previously - they’d certainly replace it if that was the issue.
I’m still on the original pawls and driver - just with oil instead of grease.
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