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  1. #1
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    Helius AC 26" 2013 Head Angle with Revelations 150mm

    Nicolai give a head angle quotation of 66.5 degrees and a fork refferring measurement of 539mm. I have a Helius AC 26" on order and will be running Rock Shox Revelations at 150mm that are more like 529mm axle to crown. So I would be interested to hear from 2013 26" Helius owners that run revelations to find out what the actual head angle is with that setup.

  2. #2
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    Steepens HA and SA by 0.5 deg and lowers your BB by 3mm based on a medium AC
    Aka chainline...

  3. #3
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    I see. Mine will be a large. Maybe the best answer is an external lower headset cup to slacken off and bring the bottom bracket back up with the 150's.

  4. #4
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    I'm running a 150mm fork on my 2013 AC but haven't tested it yet. It really shouldn't be a problem - tech sheet says 140-160mm forks.
    Simon Still
    Momentum Distribution
    www.nicolai-uk.com

  5. #5
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    Quote Originally Posted by nicolai-uk View Post
    I'm running a 150mm fork on my 2013 AC but haven't tested it yet. It really shouldn't be a problem - tech sheet says 140-160mm forks.
    Yes no problem with revs but I think the axle to crown quoted is 10mm longer than revs and hence will change all the angles. The reason I wanted the AC is that it is one of the few 140-150 frames that don't have 67-68 degree ha and is slacker. I personally find that half a degree makes a huge difference and makes a bike miles more capable which means it is a true all rounder.

    What sort of weight did your new Nicolai come out at?

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