When's the Chumba SS 29er coming out?- Mtbr.com
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  1. #1
    Northern Aggressor
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    When's the Chumba SS 29er coming out?

    Although I just a bought an XCL (review pending my Bootleg trip this weekend), I am already eager to lust over something else.. so where's that steel 29er frame that's been rumored...... I heard there's some "inside" guys on this forum .

  2. #2
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    I've seen the prototype out on the local trails. I think it may have been spotted at the Fullerton Loop last Thursday actually...

  3. #3
    Northern Aggressor
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    Fullerton Loop?! Isn't that where that Bike Gang rides? STR or something?

  4. #4
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    We are riding the prototypes around right now. Still some debate on the tubing we should use, any suggestions?
    Simple | Proven | Reliable

    http://chumbaracing.blogspot.com/

  5. #5
    Northern Aggressor
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    Hmmm... I'm thinking of a company in Europe.... England actually... could it be... Reynolds?

  6. #6
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    Quote Originally Posted by CHUMBAevo
    We are riding the prototypes around right now. Still some debate on the tubing we should use, any suggestions?
    Beryllium
    beaver hunt

  7. #7
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    Quote Originally Posted by CHUMBAevo
    We are riding the prototypes around right now. Still some debate on the tubing we should use, any suggestions?
    something with some portions of Al and V

  8. #8
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    saw one of the new proto's 2 weeks ago... its super pimpin

  9. #9
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    Use 4230 Cromo, cheap and reliable.

  10. #10
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    Any pics of the prototypes?

  11. #11
    Trophy Husband
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    Quote Originally Posted by 88 rex
    Any pics of the prototypes?
    Yeah, WHAT THE EFF?

    This thread is worthless without some mutha-effing pics.


    Extreme stationary biker.

  12. #12
    Northern Aggressor
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    I vote for:

    1) Steel
    2) Pics

  13. #13
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    CARBALTIMOLY It's kinda hard to get though.

  14. #14
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    Jasoooooonnnnnnnn.....


    Whats the ETA on this bad boy? I need to satiate my 29er jones by the spring .

  15. #15
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    Any new info?

    Just wondering if anything new has come of the SS 29er?
    Cycle tracks will abound in Utopia. ~H.G. Wells

  16. #16
    WWJR
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  17. #17
    NWchumba
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    this bike better be steel my friend.

    al on a big bike is just too flexy

  18. #18
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    Quote Originally Posted by NWchumba
    this bike better be steel my friend.

    al on a big bike is just too flexy
    That's a weird thing to say as aluminum frames are generally stiffer than steel, aren't they?

  19. #19

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    This is correct.

    Aluminum is generally stiffer than steel. Both have unique quality's.

    Quote Originally Posted by dubjay
    That's a weird thing to say as aluminum frames are generally stiffer than steel, aren't they?

  20. #20

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    Quote Originally Posted by ChumbaJason
    Aluminum is generally stiffer than steel. Both have unique quality's.
    Aluminum isn't actually stiffer than steel. Steel has a higher modulus than aluminum and as result frame makers use thinner steel tubes analagous to thicker aluminum tubes. This means the cross section of steel tubing has generally has a higher area moment of inertia than a thicker aluminum tube of comparable strength. The higher the area moment of inertia the higher the slenderness ratio - the key factor in what we percieve as stiffness.

  21. #21
    NWchumba
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    science is cool ^

    steel is still real
    it has a better "bounce" you could say

  22. #22

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    Hmmm interesting.

    After over 20 years of riding and testing bikes and motorcycles I have seen the balance go either way depending on the technology applied.
    In most of the tests the two equal weight frames made of two different materials such as steel and heat treated 6061 T6 aluminum. The steel had a spring like snap back and the aluminum had stiff but brittle feel. The true test is the ride. Who is to say what is better.
    It is a preference. If you want a bike that will not fatigue quickly than look into the Steel frames.
    You must also take into consideration that not all aluminum frames are tube and its not always a fair comparison. I can get a much stiffer frame with hydro formed aluminum closer to the 3 lb range. With steel it would take a lot of work and it would have a lot of flex. I like steel so the weight isn't something that would bother me .
    If you want lighter with flashy welds look at aluminum. either way if the geometry is correct you will be happy. I have been riding an aluminum single speed and I like it.
    I rode the prototype Solo 29er chumba it was great. The steel frame had a nice feel to it also. I just didn't get enough time on it to develop a strong opinion on that bike.


    QUOTE=theOtherMrT]Aluminum isn't actually stiffer than steel. Steel has a higher modulus than aluminum and as result frame makers use thinner steel tubes analagous to thicker aluminum tubes. This means the cross section of steel tubing has generally has a higher area moment of inertia than a thicker aluminum tube of comparable strength. The higher the area moment of inertia the higher the slenderness ratio - the key factor in what we percieve as stiffness.[/QUOTE]

  23. #23
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    bump
    Cycle tracks will abound in Utopia. ~H.G. Wells

  24. #24
    Made in China
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    Raritanium!
    "Didn't your doctor tell you to stop smoking and drinking?" George Burns "Yes but they all died"

  25. #25
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    I have a prototype that is steel medium in black w/ sliding dropouts if anyone is interested.

    A.
    Simple | Proven | Reliable

    http://chumbaracing.blogspot.com/

  26. #26
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    Quote Originally Posted by CHUMBAevo
    I have a prototype that is steel medium in black w/ sliding dropouts if anyone is interested.

    A.
    By reading this thread, I think that people are interested. Go get some pics!

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