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  1. hmcleay

    Random new bike thread

    @buckoW The i-track patents don't cover swingarm mounted idlers. But, Linkage software does use my method for calculating AS with these configurations (and any configuration with a floating idler).
  2. hmcleay

    Kinematrix (Beta) - Suspension Kinematics Optimisation Software

    Hey Monkeys, It's been a while since I was last here. Not sure if this is still the place to talk tech... I don't think I've ever ventured into the other forums on Ridemonkey. Some of you might have seen some videos on YouTube where I've used my own software to automatically adjust...
  3. hmcleay

    Suspension Kinematics Video Series

    Hey all, If you've ever been confused about ICs and CCs, then this vid could help you out. Cheers, Hugh.
  4. hmcleay

    Just how long is your....

    I'm 175cm tall and regularly switch between a M (445mm reach) and L (465mm reach). Both are the same bike (Craftworks ENR) with same 50mm stem and cockpit. Both have 601mm stack. After a bit of back-to-back riding, I think I'm more comfortable on the M, but sometimes the L feels pretty fast and...
  5. hmcleay

    Riding In Japan...

    I spent a day DHing at Fujimi Panorama (different from Mt Fuji) around 2010. http://www.fujimipanorama.com/mtb/en/ It's lift accessed, with 3 or 4 runs (only one proper DH run). It has probably improved since I was there. It was pretty wet when I was there, so not super enjoyable, but still...
  6. hmcleay

    Craftworks ENR

    Really? You know that's in AUD, approx $1750 USD. What other frames do you think are a better deal?
  7. hmcleay

    Craftworks ENR

    Hi NSH, Thanks for the compliment! I've got a DH bike modelled up, but at this stage I can't really see it being economically viable to go into production. Perhaps we'll consider some sort of crowd funding for a DH bike, so we can gauge interest before going into production. Surprisingly...
  8. hmcleay

    Suspension Kinematics Video Series

    Hey guys, The next video is up. I wanted to fit Horst Links into this episode too, but ran out of time. I was even hoping that this episode would be shorter than the last one... but I failed. I'd rather have long boring videos that cover everything, than gloss over some important things...
  9. hmcleay

    Suspension Kinematics Video Series

    PK relates to the chain growth of the 'tension' segment of the chain from the Chainring through to the cassette. With a high-pivot, there's more AS built into the linkage kinematics (I call it 'Natural AS'), meaning that you need less (or negative) chain growth to get decent Total AS figures...
  10. hmcleay

    Suspension Kinematics Video Series

    Thanks! I tried to bump up the volume afterwards, but it ended up with a lot of that 'digital' sound in the background, which was quite annoying, so I left it as it was. But I'll try and get it sorted for the next one. Great questions/comments! A more rearward axle path will increase what I...
  11. hmcleay

    Suspension Kinematics Video Series

    It's all good. You'll notice I'll try to refrain from passing judgment on specific shaped curves being "good" or "bad". The idea being that the content remains 100% factual, regardless of your personal preference (unless you can violate the laws of physics). But I'm happy if it prompts some...
  12. hmcleay

    Suspension Kinematics Video Series

    Episode 2 - Single Pivots:
  13. hmcleay

    Suspension Kinematics Video Series

    Thanks Udi. Yep, it certainly cuts down design time. For those people that have designed a bike, and then proceeded to build it, you'll know that there's usually a point in the process where you need to go back to the drawing board and adjust pivot locations to resolve a structural/packaging...
  14. hmcleay

    Suspension Kinematics Video Series

    I wish I was witty enough for that to have been intentional!
  15. hmcleay

    Suspension Kinematics Video Series

    I don't plan on making it publicly available, however people can gain access to it through my consulting services. The main reason for this, is that many clients would have their own additional design constraints (more than just limiting pivot locations to +/- Xmm) that they need to adhere to...
  16. hmcleay

    Suspension Kinematics Video Series

    Hey everyone, There's too much lizard talk and not enough armchair engineering going on in this forum, so I've decided to steer things back on track. Here's something I'll be working on over the next few months. Throughout the series I'll be discussing all things kinematics, mostly from the...
  17. hmcleay

    Trust me...

    Definitely. Anti-Dive ( = Anti-Rise) Leverage Ratio is the same as with a rear suspension, although it's difficult to see how the 'shock' is mounted internally. Mechanical Trail can't be plotted directly, but can be interpreted from the axle path plot.
  18. hmcleay

    Trust me...

    there's no option to remove the chain in linkage, just look at the Anti-Rise ( = Anti-Dive)
  19. hmcleay

    Trust me...

    Totally agree with your definition of stability. Although I interpreted the 'stability' commentary as having a lot to do with pitching rather than steering. With any amount of anti-dive (or even simply less 'pro-dive' than what you have with telescopic forks), the front is going to maintain its...
  20. hmcleay

    Craftworks ENR

    Haha, well if they're going to the effort to pull it apart, maybe they can service my forks at the same time.
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