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  1. #1
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    Forks: Complete Axle to Crown Lengths Library

    I spent some time talking with different manufacturers about Axle to Crown Lengths. Unfortunately they dont all follow a standard, so changing from Brand A to Brand B of the same travel, can have more effect on handling than just the dampening characteristics. You could have as much as 1/2 degree variation in head tube angle using different brands with the same travel. FOR ESTIMATING PURPOSES ONLY: Typically you can estimate a 0.5 degree (1/2 degree) change in Headtube Angle for every 10mm of Axle to Crown Length changed.

    Below is a list of Manufacturers Specified Axle to Crown Lengths. It would be great if anyone would measure their fork and list the length so it can be added in parenthesis so we can see what the margin of variance actually is. The next post gives directions on how to measure Axle to Crown Length on your fork.

    Please Copy and Paste the following information into your reply and fill it out completely.

    Manufacturer:
    Model Year:
    Model:
    Travel:
    Axle to Crown Length:
    Custom Work: (PUSH Industries, Garage Works, Hippie Tech, etc.)


    THIS IS NOT A COMPLETE LIST, I WILL BE ADDING TO IT FOR THE NEXT COUPLE DAYS. 29er forks and listings from DT swiss, White Bros and Maverick coming.

    [SIZE="3"]FOX[/SIZE] Fox Racing Shox Website
    Current Model Year Unless Noted Otherwise

    All models +/- 5mm

    32mm Forks

    F80: 450.9mm
    F90: 460.9mm
    F100: 470.9mm
    F120: 490.9mm

    Float, Talas, Van 130: 500.9mm
    Float, Talas, Van 140: 510.9mm (08 Talas: 515mm)
    Talas 150: 520.9mm

    36mm Forks

    Float, Talas, Van 160: 545.3mm

    40mm Forks

    Fox 40 180: 545.8mm
    Fox 40 203: 571.2mm

    [SIZE="3"]ROCKSHOX[/SIZE] RockShox website Axle to Crown Chart
    Current Model Year Unless Noted Otherwise

    All models +/- 5mm

    28mm Forks

    99-08 SID 63: 434mm
    99-08 SID 80: 451mm

    32mm Forks

    Argyle 80: 471mm
    Argyle 100: 491mm

    SID 80: 453mm
    SID 90: 463
    SID 100: 473

    Dart 80: 454mm
    Dart 100: 471mm
    Dart 120: 501mm

    Tora XC/SL/RACE 80: 450mm
    Tora XC/SL/RACE 100: 470mm

    Tora AM 80: 459mm
    Tora AM 100: 479mm
    Tora AM 120: 499mm
    Tora AM 130: 509mm

    Recon XC/SL/RACE 80: 451mm
    Recon XC/SL/RACE 100: 471mm

    Recon AM 80: 459mm
    Recon AM 100: 479mm
    Recon AM 120: 499mm
    Recon AM 130: 509mm

    05-08 Reba 85: 458mm
    05-08 Reba 100: 473mm
    05-08 Reba 115: 488mm

    Reba 80: 453mm
    Reba 100: 473mm
    Reba 120: 493mm

    06-08 Revelation 100: 478mm
    06-08 Revelation 115: 493mm
    06-08 Revelation 130: 508mm

    Revelation 140: 521mm
    Revelation 140 w/Maxle Lite: 518

    Pike 95: 473mm
    Pike 140: 518mm

    Boxxer Ride 130: 494mm
    Boxxer & Ride 174: 544mm
    Boxxer 200: 568mm

    35mm Forks

    Domain 115: 500mm
    Domain 160: 545mm
    Domain 180: 565mm

    Lyrik 115: 500mm
    Lyrik 160: 545mm

    40mm Forks

    Totem 135: 530mm
    Totem 180: 565mm

    [SIZE="3"]MAGURA[/SIZE] Magura Website
    Current Model Year Unless Noted Otherwise

    All models +/- 5mm

    32mm Forks

    Odur 85: 458mm
    Odur 100: 473mm

    Menja 85: 458mm
    Menja 100: 473mm
    Menja 130: 498mm

    Durin 80: 453mm +/-3mm
    Durin 100: 473mm +/-3mm
    Durin 120: 493mm +/-3mm

    Thor 140: 520mm

    36mm Forks

    Wotan 160: 540mm

    [SIZE="3"]MANITOU[/SIZE] Manitou website
    Current Model Year Unless Noted Otherwise

    All models +/- 5mm

    32mm Forks

    R7 80: 456mm
    R7 100: 476mm

    Minute 100: 478mm
    Minute 120: 498mm
    Minute 130: 508mm
    Minute 140: 515mm

    Nixon 145: 518mm
    Nixon 160: 540mm

    Gold Label 80: 460mm
    Gold Label 100: 480mm

    34mm Forks

    Travis Single 180: 572mm
    TravisTriple 180: 562mm
    TravisTriple 203: 585mm

    [SIZE="3"]MARZOCCHI[/SIZE] Marzocchi website Axle to Crown Chart
    Current Model Year Unless Noted Otherwise

    All models +/- 5mm

    28mm Forks

    TXC 60: 466mm

    32mm Forks

    22 100: 479mm
    22 120: 499mm

    33 80: 447mm
    33 100: 467mm
    33 120: 487mm

    44 120: 487mm
    44 140: 507mm

    4x 100: 490mm

    Corsa 100: 467mm

    DJ 100: 490mm

    35mm Forks

    55 160: 541mm
    55 ATA Micro 165: 546mm

    38mm Forks

    66 180: 564mm

    888 200: 567mm

    [SIZE="3"]Maverick[/SIZE] Maverick Forks
    Current Model Year Unless Noted Otherwise

    32mm Forks

    SC32: 495mm

    DUC32: 520mm
    Last edited by mxracer33x; 11-26-2008 at 09:32 PM.

  2. #2
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    [SIZE="3"]How to Measure your Axle to Crown Length:[/SIZE]

    It is preferable to measure in millimeters, but anything you have can be converted with decent accuracy.

    First remove the front wheel and place your thru-axle or quick release back in the fork. Pull on the lowers to make sure they are fully extended, sometimes stiction will occur and your measurement wont be accurate.

    Measure from the top of the crown (bottom of Headset race), behind the Arch on the lowers, and to the center of the backside of the Axle. This should give you a measurement accurate within a couple millimeters.





    Last edited by mxracer33x; 11-18-2008 at 01:35 PM.

  3. #3
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  4. #4
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    look on the sram website on the manufacturer section and you'll have all the RS ones

  5. #5
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    Yeah but the Sram site is way out dated for the most part. That is one of the problems I found. Ive got most of the current ones, just got a bit to get done before I can get back to filling in the blanks.

    Edit: I just saw at the very bottom of the list is the full chart of just A2C lengths. RockShox A2c Chart
    Last edited by mxracer33x; 11-18-2008 at 01:50 PM.

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    Thank you so much mxracer33x !!! This is Great. U just save me a lot of time
    searching for this info as i am buying a new fork. Btw, real nice bike u got there !!

  7. #7
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    this would make a good sticky

  8. #8
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    Good thread. How about some data on the cheaper forks that people would be upgrading from?? You've got the Darts covered, but how about Suntour, etc.
    Originally Posted by Vtolds/Dremer03---- "assume any bikes left unlocked and unattended are free to take"

  9. #9
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    Some more a2c info is available here: http://www.velik.org/components/com_...le=AxleToCrown

    upd: url fixed

  10. #10
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    Quote Originally Posted by Noobi-Wan Kenobi
    Good thread. How about some data on the cheaper forks that people would be upgrading from?? You've got the Darts covered, but how about Suntour, etc.
    don't take this the wrong way, but if you have a suntour than don't worry about the axle to crown height as it has not as much of an importance

  11. #11
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    a2c

    Quote Originally Posted by Curious-George
    don't take this the wrong way, but if you have a suntour than don't worry about the axle to crown height as it has not as much of an importance


    Well, since all forks have an axle to crown height, I have to disagree with your statement. Maybe I just don't understand what you are trying to say. Please explain.

    Actually, we should leave this thread free of this kind of discussion and let it be a gathering of data, so don't explain.
    Originally Posted by Vtolds/Dremer03---- "assume any bikes left unlocked and unattended are free to take"

  12. #12
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    Absolutely Bloody Marvelous!!! Brilliant Work!!!

  13. #13
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    Cool thread. Very helpful.
    i have more than you.
    ...because i have me and you.

    zarr

  14. #14
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    Cool and great Thanks!

    Totems are 40mm btw.

  15. #15
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    Quote Originally Posted by dirtbag
    Totems are 40mm btw.
    Thanks! Its easy to miss that stuff when your going down the list.

    Hopefully Ill get teh 29er stuff and a coupl more manuf. done friday. If not early next week for sure.

  16. #16
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    Thanks for this!

  17. #17
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    Quote Originally Posted by Curious-George
    don't take this the wrong way, but if you have a suntour than don't worry about the axle to crown height as it has not as much of an importance
    So you are saying that a person upgrading from a 100mm suntour fork does not really need to care what the axle to crown figure of the old fork was when selecting a new one?

    I guess that goes for Marzocchi now too...

  18. #18
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    Sorry to see that DT Swiss didn't make the list.

  19. #19
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    Quote Originally Posted by other aardvark
    Sorry to see that DT Swiss didn't make the list.
    My DT Swiss EXC 150 20mm TA is 520mm (so slightly less then the official reading). Others have given the same number.

  20. #20
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    Quote Originally Posted by dropadrop
    My DT Swiss EXC 150 20mm TA is 520mm (so slightly less then the official reading). Others have given the same number.
    How are you going with EXC, worth the money???

  21. #21
    wuss
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    Quote Originally Posted by other aardvark
    How are you going with EXC, worth the money???
    It's still in the box... Hopefully I'll get it togeather today, and get to ride on the coming weekend.

  22. #22
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    Quote Originally Posted by dropadrop
    It's still in the box... Hopefully I'll get it togeather today, and get to ride on the coming weekend.
    They certainly look fantastic and Im hoping they perform as good as they look cause the light weight could put my Nomad in the sub 30 pound category.Pm me on how it goes.

  23. #23
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    nice.

    great reference chat, just what I was looking for. thanks!!

    this would be a good sticky

    Porch
    "If we were Vikings, Rocky Mountain aspen stands would be our Vahalla and its singletrack our bounty" - Mtn Flyer Mag #14

  24. #24
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    Why isn't this stickied? It's super useful, yet it was almost hard to find...

  25. #25
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    sweet thread! really helpful for anyone looking to get a fork compatible with their frame, or vice versa. +1 to the idea of this being a Sticky.

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