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  1. #1
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    650B Pivot Mach 5.7??

    Anyone have one, or ride one?

  2. #2
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    Looks doable but only with a Nevegal 2.1 on the rear.

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  3. #3
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  4. #4
    27.5 Convert
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    Pivot 5.7C 27.5 Convert

    650B Pivot Mach 5.7??-pivot-5.7c.jpg

    The most important aspect of converting a Pivot 5.7C to 27.5 is adjusting the rear shock stroke length, otherwise your rear tire will contact your seat tube on full compression. I sent mine to Fox and they worked with Pivot to get the exact length needed.

    150 Revelation fork works great and has a 30mm dial down that's perfect for steeps and a lock out thats nice for out of the saddle efforts on the smooth stuff.

    Tires have been a challenge. Nobby Nics are fast and hook up reasonable well. Absolutely horrible durability. Had tons of sealant issues early on, a nasty rock cut on the tread side requiring a heavy duty auto patch, and most recently, a 1.5" sidewall slash after only 150 miles. Waiting for Continental to get their 27.5 offerings in the pipeline. Until then, I've got a set of High Rollers I'll test out.

  5. #5
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    What width are you able to fit for the rear tire?

  6. #6
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    Also have you had any problems with tire rub?

  7. #7
    27.5 Convert
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    Name:  Tire Clearance.jpg
Views: 500
Size:  4.7 KBDepending on manufacturer, you'll be limited to a wide 2.2 or narrow 2.35 in the rear. Industry Nine wheels are stiff, so no rub issues. Cannot vouch for a flexier setup.

    Picture shows clearance and standard issue scrapes from rocks.

  8. #8
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    Quote Originally Posted by BCriderX View Post
    Click image for larger version. 

Name:	Pivot 5.7C.jpg 
Views:	375 
Size:	221.4 KB 
ID:	836051

    The most important aspect of converting a Pivot 5.7C to 27.5 is adjusting the rear shock stroke length, otherwise your rear tire will contact your seat tube on full compression. I sent mine to Fox and they worked with Pivot to get the exact length needed.

    150 Revelation fork works great and has a 30mm dial down that's perfect for steeps and a lock out thats nice for out of the saddle efforts on the smooth stuff.

    Tires have been a challenge. Nobby Nics are fast and hook up reasonable well. Absolutely horrible durability. Had tons of sealant issues early on, a nasty rock cut on the tread side requiring a heavy duty auto patch, and most recently, a 1.5" sidewall slash after only 150 miles. Waiting for Continental to get their 27.5 offerings in the pipeline. Until then, I've got a set of High Rollers I'll test out.
    so the rear shock will need to be reworked....Do you know if a Fox 32 26er will work for the 650b?

    I wish I knew someone around me that had a set of 650b wheels/tires that I could throw on my 5.7 to see if I would like the setup before I drop the money and do so.

  9. #9
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    no need for more investigation....my 5.7 with Mountain king 2.4s in front measures 27.25, and with Xkings in the rear 27 inches, and these are 26ers. No need to waste money on a 650 conversion.

  10. #10
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    Quote Originally Posted by barry1me View Post
    no need for more investigation....my 5.7 with Mountain king 2.4s in front measures 27.25, and with Xkings in the rear 27 inches, and these are 26ers. No need to waste money on a 650 conversion.
    But with the same tires on a 650 rim, the overall diameter will be an inch bigger.
    Pretty worthwhile to a lot of people.

  11. #11
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    The Pivot Mach 6 looks like the ticket if you love the 5.7 but want bigger wheels. My friend raced the Mach6 in Moab and loved it, and he's an XC guy.
    Keep the Country country.

  12. #12
    27.5 Convert
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    The Pivot Mach 6 looks like a great machine. I'll wager that a coverted 5.7 will climb better due to a shorter wheel base and slightly steeper head angle (67 vs 66). If weight is an issue, the 5.7 is also a lighter setup.

    As far as the wheel size goes, if you're purely looking to increase your tire size to Surly Pugsley proportions and you don't care about speed, then throw on the biggest rubber you can find. But if you want to find balance between wheel size, weight, fun, and performance, then that's why the wheel size debate exists.

    If you already have a 5.7, like the bump compliance that a 27.5 provides without the joy sucking dimensions of a 29, and don't want to drop the coin on a brand new machine, a new fork, wheelset, and rear shock tune will get you a sweet ride.

  13. #13
    NedwannaB
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    I thought the 5.7's had tire fit issues, not so much with travel? But maybe I'm thinking Mojo SL's...

    Then again why not just get a 650 Firebird?
    Last edited by JMac47; 10-07-2013 at 11:32 AM. Reason: more info
    Wait,who did he tell you that?....

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