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  1. rbx

    [Videos] MTB Rear suspension series

    The IC is only used for braking analysis. The CC is used for acceleration behaviour.
  2. rbx

    "Aaron Gwin chainless world cup winning run, the mystery explained "

    I hope im not highjacking this thread.. I find it interesting that a guy can win on a bike that has virtually no anti-squat (even has pro-squat). But at the time that low anti-squat/low pedal-feedback feature lets Gwinn get in some pedal strokes in the rough sections so gaining some time.. So...
  3. rbx

    2015 Specialized Demo and Enduro Evo

    Has any company ever provided "efficiency" real world number differences between 0,50 and 100% AS suspension systems? I mean is it like a 5 watt power difference(loss) 0 vs 100% AS?
  4. rbx

    2015 Specialized Demo and Enduro Evo

    Funny how slowy the FSR went from a 0% to a 100% Anti-squat suspension system...
  5. rbx

    Wheel size comparison, data based

    hey mtg could you add 24" wheel in your graph?, just curious!
  6. rbx

    650 for future freeride and DH bikes

    hehehehe all this talk about 29" this and 650b..and im still thinking of putting a 24" wheel at rear! Oh well...:D
  7. rbx

    What d'ya wanna see from Eurobike?

    horst-link with P1 gearbox and idler pulley....:D
  8. rbx

    G-BOXX Planetary, first pics

    If the suspension is well designed the P-1 has the potential to the next evolution in MTB suspension. All the A/S with minimal chaingrowth!! I really like it:thumb:
  9. rbx

    Marin 2012 lineup: bastard child of IH and Trek?

    Only a DW link acts like a dw link Its not because it has small parallel links it means that it will act like a DW link. In fact not even Giant's maestro suspension acts like a dw link. Small parallel links go as far back as Balfa 2-step circa 2004.
  10. rbx

    Pedal Feedback

    This what i initially thought but i was thinking that since the front a and rear sprockets are the same size(the chain line force passes tru the main pivot so no moment is created) Then the greater force becomes the ground tire contact point(parallel to ground). I think the traditional way...
  11. rbx

    Pedal Feedback

    This is the design i have been working on On paper i should i get 100% anti-squat(thru all the travel) with zero chain extension and active braking. The cc is at the center of the alfine hub. Also the CC(center of curvature) is mid-point from the ground to the COM of standing rider. My...
  12. rbx

    Pedal Feedback

    If you look at the Zerode bike on the linkage program and place the COM of the rider at (450,850) I estimated the height of rider after drawing up a 2d CAD stick figure(real human proportions) figure standing up while accelerating. Then the mid height would be at about 575 as you said so we...
  13. rbx

    Pedal Feedback

    I still think that by having an internal geared hub with a cc pivot at just the right height you could have 100% anti-squat(thru the entire travel) and have zero pedal feedback on top of that. (same size sprocket)
  14. rbx

    Could the zerode bike suspension be the holy grail of suspension design?

    So i did not accelerate that well?
  15. rbx

    Could the zerode bike suspension be the holy grail of suspension design?

    So if i understand the maths correctly Zerode is using the ground/reaction force at rear tire contact point to create a "lifting" force at the main pivot. (moment ground force X distance to main pivot = a reaction in "y" axis equal and opposite to the "y" force acting on the rear contact...
  16. rbx

    Super Clean Gearbox out of NZ

    Zerode suspension explanation/theory of why its design is neutral to "bob" casts a doubt in my mind...:think: Its like they calculated all of their moments about the main pivot and dont use the anti-squat gorund reaction method... :think:
  17. rbx

    Tomac and Honda (Gearbox bike)

    "telescoping dual UJ alu. shaft drive with gearbox...would open up alot of suspension possibilities." The old crazy man yelled before dispairing into the wood once again!
  18. rbx

    DW Wins Split Pivot patent

    Why use a cocentric pivot at the rear axle? Wouldn't a very close rear chainstay pivot that is slighty above the rear axle accomplish the same things without stepping on specialized toes? (It would also have the adavantage of being easier to design and properly seal) Maybe im missing...
  19. rbx

    2011 Devinci Wilson DH

    DW Looking at the how the lower links meet its seems that the bike will have some brake-squat. Is my observation accurate? Is this how racers like it?
  20. rbx

    Kona Operator....Or Session, I dunno. :D

    Its shame and a waste that Kona doesnt use that long upper link to good use they good get very neutral braking. And dont give me that BS that horst link cant be laterally stiff!!
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