Quantcast

tech & innovation thread

Discussion in 'Downhill & Freeride' started by jonKranked, Apr 4, 2019.

  1. jonKranked

    jonKranked Press Button, Receive Stupid

    Rep/Likes:
    376 / 3,673
    Joined:
    Nov 10, 2005
    Messages:
    54,222
    Location:
    media blackout
    i felt like this topic deserved its own thread as some new stuff definitely is worth a look, so i didn't wanna toss it in another thread. yes, there's a lot of crap out there, but every now and then some cool stuff comes up.

    this caught my attention today:

    https://bikerumor.com/2019/04/03/ta...ears-making-chains-by-eliminating-the-roller/

    they figured out a way to remove the rollers from a chain and integrate that function into the outer plate. there's a thread in the shop forum on chainrings and one of the topics discussed was wear between chains and rings, and the part of the chain that actually wears out. the company making this chain claims the primary benefit will be improved durability / longevity of the chain, but stops short of claiming an actual amount of improvement.
     
    #1 -   Apr 4, 2019

    Please register to disable this ad.

  2. StiHacka

    StiHacka Compensating for something

    Rep/Likes:
    322 / 3,531
    Joined:
    Jan 4, 2013
    Messages:
    10,903
    Location:
    i͓̽t͓̽ i͓̽s͓̽ fu͓̽l͓̽l͓̽ o͓̽f s͓̽t͓̽a͓̽r͓̽s͓̽
    Replacing rollers with sliders? Sounds like content for another popular thread.
     
    #2 -   Apr 4, 2019
    • Winner Winner x 1
  3. rockofullr

    rockofullr confused

    Rep/Likes:
    115 / 832
    Joined:
    Jun 11, 2009
    Messages:
    7,300
    Location:
    East Bay, Cali
    Contact point for the ring/cog teeth isn't flat any more. Wonder if that will cause problems.

     
    #3 -   Apr 4, 2019
  4. Toshi

    Toshi Harbinger of Doom

    Rep/Likes:
    183 / 1,396
    Joined:
    Oct 23, 2001
    Messages:
    24,941
    This is where we post the latest improvements to e-bike drivetrains, right?
     
    #4 -   Apr 4, 2019
    • Funny Funny x 3
    • Horns Horns x 2
    • Dislike Dislike x 1
  5. KenW449

    KenW449 Thanos did nothing wrong

    Rep/Likes:
    31 / 267
    Joined:
    Jun 13, 2017
    Messages:
    2,460
    Location:
    Floating down the whiskey river...
    Some people in the comments are talking about increased wear on the cog and cassettes. So, the chain may last longer but wears the other, more expensive components faster. For marginal weight savings, not sure its worth it.
     
    #5 -   Apr 4, 2019
    • Like Like x 1
    • Funny Funny x 1
  6. johnbryanpeters

    Rep/Likes:
    244 / 2,671
    Joined:
    Sep 27, 2001
    Messages:
    24,886
    Location:
    Making moss sad in New Haven, Vermont
    That.
     
    #6 -   Apr 4, 2019
  7. jonKranked

    jonKranked Press Button, Receive Stupid

    Rep/Likes:
    376 / 3,673
    Joined:
    Nov 10, 2005
    Messages:
    54,222
    Location:
    media blackout
    Yea, that's not how it works.
     
    #7 -   Apr 4, 2019
  8. WestCoastHucker

    WestCoastHucker Turbo Monkey

    Rep/Likes:
    40 / 172
    Joined:
    Oct 23, 2003
    Messages:
    3,079
    Location:
    daydreaming about a new rhythm line.....
    seems like it would. without the rollers, all contact is strictly friction...
     
    #8 -   Apr 4, 2019
    • Winner Winner x 1
  9. jonKranked

    jonKranked Press Button, Receive Stupid

    Rep/Likes:
    376 / 3,673
    Joined:
    Nov 10, 2005
    Messages:
    54,222
    Location:
    media blackout
    #9 -   Apr 4, 2019
  10. KenW449

    KenW449 Thanos did nothing wrong

    Rep/Likes:
    31 / 267
    Joined:
    Jun 13, 2017
    Messages:
    2,460
    Location:
    Floating down the whiskey river...
    https://www.chiefdelphi.com/t/difference-between-roller-and-rollerless-chain/150713/2

    "Why would one want ‘rolling’ bushings instead of non-‘rolling’ bushings?

    Mostly for sprocket wear. This is where I could use a better picture, but look at this basic one here 3, and picture that sprocket is being driven by an outside force causing it to rotate clockwise. On the top, the chain is contacting near the midpoint of the sprocket tooth on the bushing as the tooth engages the chain. The chain then gets pulled into the root between the teeth, and then comes back out on the slack side. With a bushing, this is all sliding movement between the bushing and the sprocket, causing more wear than if you had a roller."
     
  11. Flo33

    Flo33 Monkey

    Rep/Likes:
    27 / 308
    Joined:
    Mar 3, 2015
    Messages:
    985
    Location:
    Styria
    • Useful Useful x 1
  12. Flo33

    Flo33 Monkey

    Rep/Likes:
    27 / 308
    Joined:
    Mar 3, 2015
    Messages:
    985
    Location:
    Styria
    This is what makes me a fair bit skeptical about the claimed benefits in wear/durability. There is no bearing rolling down and up the tooth of the sprocket but a bushing sliding that slope. And we all know how perfectly clean those surfaces are in our field of application of chain drives.
     
    • Like Like x 1
  13. jonKranked

    jonKranked Press Button, Receive Stupid

    Rep/Likes:
    376 / 3,673
    Joined:
    Nov 10, 2005
    Messages:
    54,222
    Location:
    media blackout

    yea, there's definitely potential for increased wear by removing the roller / bushing from a chain (but they don't rotate as much as you might thing). but most wear to the cassette cogs / chainrings occurs from a "streched" chain (ie a chain where the rollers have worn down, which increases the space between them) when the chain doesn't sit where its supposed to; so they gears aren't wearing from friction but rather deformation due to the "stretched" chain.
     
  14. Jm_

    Jm_ Turbo Monkey

    Rep/Likes:
    152 / 1,282
    Joined:
    Jan 14, 2002
    Messages:
    8,778
    Location:
    AK
    That doesn’t make sense, if only the rollers were wearing, we wouldn’t see the “stretch” between the pins when we measure a foot of chain.
     
  15. englertracing

    englertracing Monkey

    Rep/Likes:
    5 / 13
    Joined:
    Mar 5, 2012
    Messages:
    116
    Location:
    La Verne
    Stretch is from pins wearing,
    Worn rollers arent bitchn either
     
  16. rpet

    rpet Turbo Monkey

    Rep/Likes:
    23 / 233
    Joined:
    Jun 9, 2003
    Messages:
    2,808
    Location:
    El Lay
  17. rideit

    rideit Bob the Builder

    Rep/Likes:
    87 / 1,446
    Joined:
    Aug 24, 2004
    Messages:
    6,436
    Location:
    In the cleavage of the Tetons
    I want to use one to crack walnuts.
     
    • Like Like x 1
  18. jonKranked

    jonKranked Press Button, Receive Stupid

    Rep/Likes:
    376 / 3,673
    Joined:
    Nov 10, 2005
    Messages:
    54,222
    Location:
    media blackout
    I want to hook a mini bellow up to it and have a shed on wheels
     
    • Funny Funny x 1
  19. KenW449

    KenW449 Thanos did nothing wrong

    Rep/Likes:
    31 / 267
    Joined:
    Jun 13, 2017
    Messages:
    2,460
    Location:
    Floating down the whiskey river...
  20. rpet

    rpet Turbo Monkey

    Rep/Likes:
    23 / 233
    Joined:
    Jun 9, 2003
    Messages:
    2,808
    Location:
    El Lay
    Do they have a “static” head angle?
     
  21. Electric_City

    Electric_City The orangutans are loose!

    Rep/Likes:
    16 / 255
    Joined:
    Apr 14, 2007
    Messages:
    1,345
    I'd buy one and put a 36 on it. Then sell the fork on ebay cause nobody can buy it.
     
  22. Jm_

    Jm_ Turbo Monkey

    Rep/Likes:
    152 / 1,282
    Joined:
    Jan 14, 2002
    Messages:
    8,778
    Location:
    AK
    Its like they blew their entire wad on the front of the bike.













    *of money*
     
  23. KenW449

    KenW449 Thanos did nothing wrong

    Rep/Likes:
    31 / 267
    Joined:
    Jun 13, 2017
    Messages:
    2,460
    Location:
    Floating down the whiskey river...
    • Like Like x 1
  24. rpet

    rpet Turbo Monkey

    Rep/Likes:
    23 / 233
    Joined:
    Jun 9, 2003
    Messages:
    2,808
    Location:
    El Lay
  25. slyfink

    slyfink Turbo Monkey

    Rep/Likes:
    101 / 1,465
    Joined:
    Sep 16, 2008
    Messages:
    5,612
    Location:
    Ottawa, Canada
  26. StiHacka

    StiHacka Compensating for something

    Rep/Likes:
    322 / 3,531
    Joined:
    Jan 4, 2013
    Messages:
    10,903
    Location:
    i͓̽t͓̽ i͓̽s͓̽ fu͓̽l͓̽l͓̽ o͓̽f s͓̽t͓̽a͓̽r͓̽s͓̽
    • Horns Horns x 2
  27. PUSHIND

    PUSHIND PUSH Industries (Duh)

    Rep/Likes:
    3 / 28
    Joined:
    Dec 5, 2003
    Messages:
    168
    Location:
    Colorado
    • Funny Funny x 2
    • Like Like x 1
    • Useful Useful x 1
  28. jonKranked

    jonKranked Press Button, Receive Stupid

    Rep/Likes:
    376 / 3,673
    Joined:
    Nov 10, 2005
    Messages:
    54,222
    Location:
    media blackout
    Can I get a puppet valve for my 6*6?
     
  29. rockofullr

    rockofullr confused

    Rep/Likes:
    115 / 832
    Joined:
    Jun 11, 2009
    Messages:
    7,300
    Location:
    East Bay, Cali
  30. rpet

    rpet Turbo Monkey

    Rep/Likes:
    23 / 233
    Joined:
    Jun 9, 2003
    Messages:
    2,808
    Location:
    El Lay
    "not ideal" is quite an understatement! They should learn how suspension works before building suspension.

    Combined bike/rider weight on an MTB could be as low as 120lbs or higher than 260lbs.

     
  31. rockofullr

    rockofullr confused

    Rep/Likes:
    115 / 832
    Joined:
    Jun 11, 2009
    Messages:
    7,300
    Location:
    East Bay, Cali
    Yeah but a few clicks of preload will fix that right up :bonk:

    Kinda like how Trust wants us to believe that one fork will work for bikes designed for 110mm to 140mm travel forks

    But it's a carbon leaf spring. So carbon.
     
    • Like Like x 1
  32. rpet

    rpet Turbo Monkey

    Rep/Likes:
    23 / 233
    Joined:
    Jun 9, 2003
    Messages:
    2,808
    Location:
    El Lay
    This voodoo about the magical damping properties of carbon is tiresome.

    I found it interesting how the owner of We Are One downplayed it in that recent Downtime podcast interview.