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  1. #1
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    Fatty Look Fournales Suspension Fork

    Just had my Look Fournales machined up with just enough room for a 5.0 if I want. 3.8 Nate on there now.

    I love link forks and just couldn't go Lefty. I think I'm under their weight too. Unverified, I added about 200g to the already light fork. I was too excited and had to get them on. I will get to weighing in soon.

    Fatty Look Fournales Suspension Fork-img_2875.jpgFatty Look Fournales Suspension Fork-img_2876.jpgFatty Look Fournales Suspension Fork-img_2877.jpg

  2. #2
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    right on!!

  3. #3
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    Machined parts

    Pics of 35mm wider machined links.

    Fatty Look Fournales Suspension Fork-rsz_img_2860.jpgFatty Look Fournales Suspension Fork-rsz_img_2861.jpg]

  4. #4
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    Nice!
    Transition Bandit 29
    Surly Ogre
    Surly Necro Pugs w/ Lefty PBR
    Surly Big Dummy

  5. #5
    will rant for food
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    Very nice! I have a pair of Noleen forks I'm going to give the same treatment.
    Latitude: 44.93 N

  6. #6
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    Quote Originally Posted by Drew Diller View Post
    Very nice! I have a pair of Noleen forks I'm going to give the same treatment.
    Noleen top links should be cheaper to get machined up. The hardest part you might have is cutting and extending the legs since they are not round stock. You could clear a 24" fat tire without adding height. But then again.... you can machine a height spacer, just not the cheaper mill process.

    I cut and added a 1.5" gap in the legs with .75" overlap each way.

  7. #7
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    You disappoint me Drew.

    At the very least, bamboo legs.

    I've had the same idea, I've dismantled my Girvins with the same purpose, but stopped when I realised that I was just doing it to see if it could be done. (I don't really want suspension - just another thing to maintain).

    If I was going to do it, I'd do it to my Fournales too.

    If it was the Girvin, I'd change the lengths of the links to alter the suspension path.

    EDIT: Forgot to congratulate Wickedlite on a neat conversion.
    Last edited by Velobike; 03-11-2013 at 04:37 AM.
    As little bike as possible, as silent as possible.
    Latitude: 5736' Highlands, Scotland

  8. #8
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    Fatty Look Fournales Suspension Fork

    Awesome!

  9. #9
    will rant for food
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    Quote Originally Posted by Velobike View Post
    You disappoint me Drew.

    At the very least, bamboo legs.
    Off topic: hey, I own a lathe now. Some day.
    Latitude: 44.93 N

  10. #10
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    Nice machining and great fork

  11. #11
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    Any side views or what the linkage looked like pre-modification?

  12. #12
    Dr Gadget is IN
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    Here you go:

    Fatbikes are much more fun than they should be allowed to be!

    WSS/OSS: open source sealant

  13. #13
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    Those pics are the newer version Fournales which you can see are more 3D machining and they have bearings which are replaceable. I have the new ones too but thought the machining to match would cost more but I did lengthen them for one of my 29ers. The ones I fattened are the older version with flatter machining and unreplaceable bushings.

    Name:  fournales.jpg
Views: 1991
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    Fatty Look Fournales Suspension Fork-fatnecro.jpg

    I'm gonna tear it down and do a weigh in today. I'm not a weenie but definitely a gram counter. I will get some pics side by side so you can see diff.

    And I tell ya after riding all winter with out suspension and going for a ride last night with...I forgot how great suspension was and I was gigglin the whole way. Smooth, fun, long ride it was.

  14. #14
    Smash Mode: ON
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    Hide yo kids, hide yo wife!
    Whatever floats your bike, dude

  15. #15
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    Fatty Look Fournales Suspension Fork

    How much does it lengthen the wheel base?

  16. #16
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    Quote Originally Posted by Schott View Post
    How much does it lengthen the wheel base?
    Schott, Fournales add .25" to wheel base and remains the same under compression. Great thing about link forks.
    Last edited by WickedLite; 03-11-2013 at 06:15 PM. Reason: spelling error

  17. #17
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    Ok... so weights as far as I can get them.

    I didn't weigh forks before or after mods. I didn't weight the fork tube spacer before I bonded them on but they are extremely light.

    Note: bushings are out of old links and in new links as well as oil ports.
    Original top link 84.7g (wo bushings), New top link 145.9g(w bushings)= +61.2g
    Original bottom link 101.8g (wo bushings), New bottom link 162.7(w bushings)= 60.9g
    New wider face plate 33g+16g nuts and bolts= 49g

    So that's 171.1g more weight(give or take because of bushings)
    This does not include leg spacers.

    I know I can drop weight in the nuts and bolts and still drill/cut out some weight.
    Fatty Look Fournales Suspension Fork-img_2880.jpgFatty Look Fournales Suspension Fork-img_2881.jpg

    The new face plate is longer and bolts to old face plate and the legs. This was a cheaper route than machining the old face plate with shock mount
    Fatty Look Fournales Suspension Fork-img_2882.jpg
    Fatty Look Fournales Suspension Fork-img_2884.jpg

    Small Fournales originally weigh 1230g. G-Dang, I shoulda weighed in before I put them back on. I rush to put back on because I hate down time on riding so bare with me. I will get complete weight soon.

  18. #18
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    Quote Originally Posted by WickedLite View Post
    Those pics are the newer version Fournales which you can see are more 3D machining and they have bearings which are replaceable. I have the new ones too but thought the machining to match would cost more but I did lengthen them for one of my 29ers. The ones I fattened are the older version with flatter machining and unreplaceable bushings.

    Name:  fournales.jpg
Views: 1991
Size:  19.9 KB
    Click image for larger version. 

Name:	FatNecro.jpg 
Views:	497 
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ID:	779841

    I'm gonna tear it down and do a weigh in today. I'm not a weenie but definitely a gram counter. I will get some pics side by side so you can see diff.

    And I tell ya after riding all winter with out suspension and going for a ride last night with...I forgot how great suspension was and I was gigglin the whole way. Smooth, fun, long ride it was.
    What's with the wheels covers?
    Still cleaning my Fatback.
    It's a life style.

  19. #19
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    I find I'm .6 mph faster and it keeps the snow off my rims and why not.... I always loved disc wheels

  20. #20
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    How much would it cost to get a set of those linkages?

    It looks like the most straightforward method of building a fat suspension fork.
    As little bike as possible, as silent as possible.
    Latitude: 5736' Highlands, Scotland

  21. #21
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    Quote Originally Posted by Velobike View Post
    How much would it cost to get a set of those linkages?

    It looks like the most straightforward method of building a fat suspension fork.
    is that rim brake only?

  22. #22
    Dr Gadget is IN
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    Speaking more as a gadget-guy, could you tell us the length of the two links, and the distance between their pivots on the steer tube and the fork legs? Basically the lengths of the 4 sides of the linkage. Also, the fork leg length from top pivot to center of drop out?

    I have an old spreadsheet built to analyze these linkages, and I'd like to see the curve produced.

    Thanks.
    Fatbikes are much more fun than they should be allowed to be!

    WSS/OSS: open source sealant

  23. #23
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    Quote Originally Posted by Velobike View Post
    How much would it cost to get a set of those linkages?

    It looks like the most straightforward method of building a fat suspension fork.
    My machinist cost me $800 cash for both links, face plate and milling the $9 tube I brought in. Add $40 (if I remember correctly) for Loctite Hysol 9430 resin and hardener to bond carbon to aluminum and that's $849 for mods.

    He did say it normally would cost about $1500 for that job but I bring him cool projects quit often.

    Just a note: It cost me $200 just for the fork leg spacers when I got those milled for my 29er Fournales. So $600 for just the links and faceplate is a pretty sweet deal.

  24. #24
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    Quote Originally Posted by easterntide View Post
    is that rim brake only?
    Disc baby!

  25. #25
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    Quote Originally Posted by wadester View Post
    Speaking more as a gadget-guy, could you tell us the length of the two links, and the distance between their pivots on the steer tube and the fork legs? Basically the lengths of the 4 sides of the linkage. Also, the fork leg length from top pivot to center of drop out?

    I have an old spreadsheet built to analyze these linkages, and I'd like to see the curve produced.

    Thanks.
    Make your own ehh?

    Fork legs from center top pivot to dropout center: 21.5"

    Top link:
    Front center pivot to rear center pivot: 4"
    Top link front width: 5"
    Top link rear width: 3.228"

    Bottom link:
    Front center pivot to rear center pivot: 4.5"
    Front width: 4.316" (approx because of O-Rings)
    Rear width: 3.233"

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