Back to the Drawing Board Nov 24, 2008


At first, I wasn’t going to post this, but after thinking about it for a bit, I decided I should. There have been some conversations lately on this blog about rims. I’m not going to get into the debate again and I do think that this is a freak accident, but I’ve never seen something like this happen before and I believe it’s important to get this out there.

That being said, let me apologize to H+Son [H plus son, H + Son, ect] for posting it, but if this starts to happen a lot, you guys are going to have to re-evaluate how you’re manufacturing your rims.

You don’t want people’s wheels exploding on them while they’re bombing traffic, hills or whatever.

Thanks for the info Ganring.

My take on what happened:

It’s obvious the rim exploded at the valve-stem drilling in the rim. What most likely occurred was that the rider made an error we all have at some point; he didn’t properly nest the tube and tire within the hooks of the rim’s cross-section.

What usually happens when you do that is your tube slips past the wire bead of the tire and forms a bubble. You can ride on it like this, but it will eventually explode. From my observation, it appears that the rim’s inner wall was weaker than the tire bead and it took the released force the hardest resulting in the damage shown above.

These rims are deeper than Velocity Deep Vs and appear to be 1/2 the weight as well. Something has been compromised in the process.

The rider was not bunny-hopping or doing anything that would cause this kind of fracture. I was told that he just did a skid and heard a “pop”.

EDIT: Jay Rooney just alerted me to their new use!

  • Colby

    Check our blog later today and laugh it up. I hope there all not like that

  • matty

    You were more generous than I was. I was skeptical about these rims, and heard a few rumors of weakness. Seeing the pictures, though – wow.

    This underscores some of the ridiculous of the fixed/internet/whatever scene – somehow these untested rims already got a reputation as being sturdy.

  • akahn

    So many hip shoes in one photo.

  • andrew

    I posted it on my site as well. Not as nicely as you but hopefully when you google h+son it will come up to warn everyone.

  • kale

    They should rename themselves H+Sonned.

  • prolly

    brilliant! I wish I woulda thought of that! hahaha

  • huphtur

    John, check out this thread (including official H+Son reply)

  • Kenny Price

    Man why couldn’t you post this about a week ago. I just got my HSON rim in today and now I feel like shit. hahaha

  • chris

    damn, i just laced a pair of these to my grand compe’s. this is not the sorta thing i need to be seeing now. no hill bombing here, but i kinda like the idea of my wheels…uh…NOT exploding.

  • john

    decompression is a very strong force, and these have thin walls… id really like to know MORE about this before i make a judgment about them. obviously this was a catastrophic failure, but i’d need to see this kind of thing repeated identically to say it’s not just an isolated freak incident. that and tzusing has been a classy fellow with confidence in his product, and has said repeatedly “these rims are made to be light and fast” not “bombproof”. (though im not saying the rider had ever used them for tricks)

  • Tzusing

    There has been no official H Plus Son reply as we have yet to see the rim in person.
    The “official reply” that people are posting, is in fact a few weeks old, and is not a response to this rim.

    Prolly the rim isn’t half the weight of a Deep V, they are about the same: 580 grams.

    The tire well of these rims is made to the same specs as the many other road rims we manufacture. They are 0.8, plus or minus 0.1 mm

    We are a new brand. But the factory has been making rims for the past 10 years. We make about 6-7 million rims each year and about 2 million of them are double walled.

    We don’t want to piss anyone off, nor do we want to push responsibility onto someone else. But please we think there needs to be more investigation into the real problem of this before pushing the blame onto one party.

    We have asked for the customer to send us their address and phone number and a representative will go and inspect the rim.

    If for some reason the rim did not rip apart and cut open the inner tube, we believe we reserve the right to take this a step further in clearing our name.

  • ganring

    Hi, yes I just want to share the imfomation of what happened with this rim.
    so, i don’t want to make a great fuss about this.
    i’ll use this rim from now on, because i just lased wheel with this rim.
    and i’ll lase with other new H+Son.

    what we have to do is investigation of this case.

  • Matty

    I think the salient point for me, and the motivation behind my blog post, was that this is a particularly extraordinary failure that even in extreme cases should not happen quite so dramatically. Tzusing and the Giant Factory need to reevaluate their design and materials almost as much as the scene needs to reevaluate the process by which components get hyped.

  • prolly

    The only time I’ve ever heard of a rim splitting like is when MTB’rs run tubes on a tubeless set up. The rim splits.

    There is no excuse for this to happen and if it continues to happen, H+Son will have a huge mess on their hands.

    I really hope this was a freak accident. For everyone’s sake.

    On another note, my Equalizer 23s are holding up fantastically and they’re not splitting open like tacos.

  • Angelo R.

    I want to to see if is an actual site, but I will wait until I leave the office.

  • prolly

    oh it is… beware of the wizard!

  • Chris
  • Beefy McManstick

    lolclits is my new favorite site!