[US] Go Kart Hubs for Esk8

Hi all,

Go kart tires are starting to catch on in the esk8 racing scene. Like it or hate it, I wanna try it, and currently the only way to do so is by having Stooge make you a custom 5/8” axle for your 3-links and modifying an off the shelf go kart hub to mount to his gears.

I wanted something with maximum compatibility with existing esk8 trucks, drive patterns, standards, and go kart wheels, so anybody can use these tires to “ruin esk8 wheel to wheel racing forever” -@Evwan :wink:

Enter:

GK Hubs

Compatibility list:

Bearing spacing:

  • MBS - with extended outside bearing bores, you can stack up to three bearings for increased load capacity, depending how much axle space you have. We worked closely with Big Bearing™ on this design to ensure you’ll be buying as many bearings as possible.
  • Urethane (please don’t actually use this, it was put there exclusively for shits, giggles, and photo shoots) - one 22mm bearing seat, one 28mm bearing seat. Use one 608 and one 638 bearing

Esk8 drive bolt patterns:

  • MBS - threaded holes
  • China 80mm - threaded holes; MBS usually works fine but we added it just in case
  • Linnpower/Etoxx gear drives - 40mm circle
  • Exway gear drives - 43mm circle
  • SRB drive hub pattern, but M4 instead of 8-32 (in case the MBS interface suddenly disappears again :wink:)
  • Additional patterns might be added on a case by case basis if you ask within the next few days, but no guarantees

Go kart wheel bolt patterns:

  • American standard - uses captive nut pockets on the inside of the hub and bolts to attach the wheel. These hubs have been tested to fit inside DWT Classic American standard wheels, which is what Stooge has been using
  • Metric standard - counterbored threaded holes to accept standard M8x1.25 kart studs
  • CRG front hub standard - counterbored threaded holes to accept standard M8x1.25 kart studs

These hubs are designed for kart wheels with 2” backspacing or less. Others might work, but likely future batches of these made at different lengths will be required.

Drawings, courtesy of @jack.luis, who will take over selling these after this initial batch:

If you need custom parts designed, hit him up on his website:

Pricing and Availability:

Currently $200 per set of four shipped, but if we get 10 sets sold, that will drop to $150 shipped. Full price is expected to be $250+ if this becomes a stocked item.

Extras:

Wheel centering rings: we plan to offer 3d printed wheel centering rings for common size wheel bores to eliminate wobble while mounting. They will center based on the bearing bore of the hub. More info and pics to come.

Laser cut drive shims: depending your tire/wheel combo and/or drive system, the tire may bulge past the edge of the wheel, interfering with drive components. We plan to offer laser cut shims in varying patterns to increase spacing between wheel and drive system to address this issue.

Interest:

Who wants em?

*looks for the poll button* fuck I have to be a regular to do that and I keep losing it. Jackon will post the interest poll

13 Likes
Are you interested in buying into the first batch of GK Adapters for $200 to $150 shipped CONUS
  • Yes
  • Yes but only if we order enough to get to $150
  • I’ll buy later at $250
  • I just wanna touch the poll
0 voters

Also here’s a list of all my holes

4 Likes

:ogre::ogre::ogre:

3 Likes

hole pattern reminds me of the isle of man flag, built for speeeedddd

5 Likes

Should we change the name of these to “GoSK8 Hubs” ? GoSkart Hubs?

Quickly @BenjaminF think of a name you hate

6 Likes

I’m not super knowledgeable and don’t want to start an argument or anything, but isn’t the centering ring on a go-kart hub supposed to help support the weight? I was under the impression it was there for more than just centering. I’m somewhat interested, but feel like I’d prefer something that has an integrated centering ring, even if it ends up being less universal as far as the kart wheels used or requires some kind of adapter or something.

2 Likes

That’s new info to us!

We are gonna do some research on this and get back to this thread with what we find and how we changed the design to account. Thanks for the heads up!

Edit after very quick research:

First thing I found is this video

At about 20 seconds on they share the same info I assumed while designing this. I am more than interested in getting more opinions. Thanks again!

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Count me in if you get to $150!
Possibly $200

4 Likes

I added a poll option for you!

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Sweet.

These hubs look dope. I love how flexible they are

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They better not be! :grin: Idk if we mentioned but we’ll be using 6061 alu with black anodizing

4 Likes

oh yeah maybe that would’ve been useful to add to the post :sweat_smile:

It seems I may have been mistaken. I think I was told that the lugs don’t support the weight of the wheel and thought that meant the ring does, but what is really happening is that once you tighten the lugs with everything centered, it’s the friction between the wheel and the hub that actually transfers the force.

1 Like

Glad we were able to clear that up!

While we’re on the topic here is what the centering ring will look like. Comes free with the hubs and you just lmk what your go karts center circle diameter is. This example is 1.75in.

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I have no knowledge on these things, is this a part that could be FDM 3D Printed?

Yes, please read above

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Is there a way to distinguish between the MBS and the 80mm China pattern on the hub?


carefully

3 Likes

Looks like you’re planning on using captive hex nuts instead of tapped holes(?)
Any reason for that(cost?)
Personally I prefer tapped holes, less faf. but that’s personal preference

1 Like

Don’t have to wait for loctite to cure?

2 Likes