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  1. #1
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    Dh fork or not

    Hi I got a 2010 specialized sworks epic .. very nice bike with the e100 brain fork ... the fork works good but if I take a few jumps I drop from 125psi to 80psi... if I ride normal it hold 125psi the whole time.. only losses pressure when iam jumping any thing I can..

    We do mostly trails.. road and offroad not very much downhill.. dont have facilities where I stay..


    I can get one for a good price and it will look good on bike. Reason why I want dh fork is looks..

    I dont know if it would work on my bike and the conditions I ride.. I believe the dh fork has no lock out... I dont know if that would be an issue.

    My question is could I put a down hill fork in or not?

  2. #2
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    Quote Originally Posted by 519Franco View Post
    Hi I got a 2010 specialized sworks epic .. very nice bike with the e100 brain fork ... the fork works good but if I take a few jumps I drop from 125psi to 80psi... if I ride normal it hold 125psi the whole time.. only losses pressure when iam jumping any thing I can..

    We do mostly trails.. road and offroad not very much downhill.. dont have facilities where I stay..


    I can get one for a good price and it will look good on bike. Reason why I want dh fork is looks..

    I dont know if it would work on my bike and the conditions I ride.. I believe the dh fork has no lock out... I dont know if that would be an issue.

    My question is could I put a down hill fork in or not?
    Totally, go for it

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  3. #3
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    Quote Originally Posted by GT87 View Post
    Totally, go for it

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    Thanks buddy .

    You dont think it would change my bike geometry too much?

    And be spongy when cycling hard due to no lock out?


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  4. #4
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    I personally would get a burly single crown AM or DJ fork with the same axle to crown measurement. You could go for a DH but just seems overkill to me, and going to be almost impossible to find a 100mm DH fork. If you don't care about the weight or dealing with a dual crown setup, no reason it wouldn't work, but you definitely want to match the fork size as close as possible or it can mess up the ride quality.

    Have you had the fork serviced? You shouldn't be losing pressure on a ride but I guess that is an XC fork so may be out of its intended usage?
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    Quote Originally Posted by jestep View Post
    I personally would get a burly single crown AM or DJ fork with the same axle to crown measurement. You could go for a DH but just seems overkill to me, and going to be almost impossible to find a 100mm DH fork. If you don't care about the weight or dealing with a dual crown setup, no reason it wouldn't work, but you definitely want to match the fork size as close as possible or it can mess up the ride quality.

    Have you had the fork serviced? You shouldn't be losing pressure on a ride but I guess that is an XC fork so may be out of its intended usage?
    Yea the fork is serviced..
    The dh fork is a rockshock boxxer rc 2011.
    I believe it's a 200mm travel.
    Ism not worried with weight...
    Not losing pressure on rides or offroad only loose pressure when iam jumping every thing that I can jump.. then presure is lost.

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  6. #6
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    Pretty sure GT87 was being a little sarcastic, at least I hope so.

    A 200mm fork on a xc race bike is not a good idea. But hey, if it looks cool.......

  7. #7
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    OK, I'm just going to say it...this is a terrible idea. That bike is not meant to have 200mm fork up front. you could go to 120mm, but 200, way too much.
    Specialised brain stuff is renowned for being good when it works, but last for about 5 minutes before needing a full rebuild/replacement.
    All the gear and no idea.

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    Quote Originally Posted by mik_git View Post
    OK, I'm just going to say it...this is a terrible idea. That bike is not meant to have 200mm fork up front. you could go to 120mm, but 200, way too much.
    Specialised brain stuff is renowned for being good when it works, but last for about 5 minutes before needing a full rebuild/replacement.
    What's terrible about it? Only drawbacks I see are that it'll be a little bit heavier, and will forgo the lockout, but OP is already aware of these compromises. On the plus side, it'll improve the geometry by slacking out the angles and raising the bb, it'll reinforce the headtube area so the frame will be way less likely to fail when casing gaps, and most importantly it'll look badass! 2010 epic with a boxxer is a proper downcountry bike.

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  9. #9
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    Quote Originally Posted by GT87 View Post
    What's terrible about it? Only drawbacks I see are that it'll be a little bit heavier, and will forgo the lockout, but OP is already aware of these compromises. On the plus side, it'll improve the geometry by slacking out the angles and raising the bb, it'll reinforce the headtube area so the frame will be way less likely to fail when casing gaps, and most importantly it'll look badass! 2010 epic with a boxxer is a proper downcountry bike.

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    Really can't tell if your being serious or not?
    Yeah it will weigh more, clearly, no lockout, not the end of the world, but it will be a soft squishy mess of travel.
    It will raise up the BB, but also everything else at the front end and do super crazy things to the geo, not just "improve it" it go beyond into "sucktastic". The Sworks epic is a super light XC bike, you put a duel crown 200mm fork with the super slacker out front end, it won't reinforce the headtube, the extra leverage, it'll more than likely snap the headtube clean off.

    If it was a beater bike to do silly stuff on, then id say maybe try it, but watch the front falling off and loosing all your teeth... but the OP said "We do mostly trails.. road and offroad not very much downhill", so a boxxer would be a terrible idea.
    All the gear and no idea.

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    Quote Originally Posted by mik_git View Post
    Really can't tell if your being serious or not?
    Yeah it will weigh more, clearly, no lockout, not the end of the world, but it will be a soft squishy mess of travel.
    It will raise up the BB, but also everything else at the front end and do super crazy things to the geo, not just "improve it" it go beyond into "sucktastic". The Sworks epic is a super light XC bike, you put a duel crown 200mm fork with the super slacker out front end, it won't reinforce the headtube, the extra leverage, it'll more than likely snap the headtube clean off.

    If it was a beater bike to do silly stuff on, then id say maybe try it, but watch the front falling off and loosing all your teeth... but the OP said "We do mostly trails.. road and offroad not very much downhill", so a boxxer would be a terrible idea.
    A serious question deserves a serious answer.

    Please note that the OP mentions "jumping everything he can". Clearly he will benefit from massive upgrade in performance from the dual-crown fork.

    Slacker headangle = more stability = better downhill performance.

    Slacker seat-angle = more efficient pedaling position for seated pedaling while riding downhill on jump trails. Be sure to adjust the rear shocks rebound wide open and run your seatpost at full height for best results.

    Higher bb = more ground clearance = obviously better for riding off-road and pedaling indiscrimately over obstacles.

    Higher a2c = shorter reach = more flickable = more steaze when boosting big airs.

    Dual crowns = twice as good as single-crown = 3x more badass looking = 4x more babes want your number at the trailhead. No more worries about the headtube shearing off... the dual-crown solves that problem by reinforcing the headtube area of the frame.

    If you're worried about the fork raising the handlebars too much for efficient climbing, you could try running more sag and less compression damping... something in the neighborhood of 40-50% sag should be ideal = problem solved.

    The 2010 epic was a good bike for it's time, but things have come a long way since. The boxxer upgrade will modernize the bike and turn it into a true downcountry ripper.

    One other word of advice... I don't care how good the deal seems, I wouldn't even consider buying an old 26" boxxer unless the seller was a teenager that lives near a bike park.

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  11. #11
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    he actually said "Jumping everything I can jump", I took that to mean he would jump everything that he had the ability to jump, as in he liked jumping but wasnt about to jump anything big (big being relative). - he also said he didn't do much DH at all, more general trail and road riding.
    And a 2010 epic was a good bike in its time, but would a 2011 boxxer really modernize it that much?

    Thing is the OP could do it and it could be perfect for him and give years of pleasurable riding, but I'd think having twice as much travel as it is designed for, and being a pure XC bike, it will handle like poo and the extra leverage and stiffnes, instead of flexing in the fork/steerer, will snap the headtube off the 5th time he cases a jump.
    All the gear and no idea.

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    Quote Originally Posted by mik_git View Post
    he actually said "Jumping everything I can jump", I took that to mean he would jump everything that he had the ability to jump, as in he liked jumping but wasnt about to jump anything big (big being relative). - he also said he didn't do much DH at all, more general trail and road riding.
    And a 2010 epic was a good bike in its time, but would a 2011 boxxer really modernize it that much?

    Thing is the OP could do it and it could be perfect for him and give years of pleasurable riding, but I'd think having twice as much travel as it is designed for, and being a pure XC bike, it will handle like poo and the extra leverage and stiffnes, instead of flexing in the fork/steerer, will snap the headtube off the 5th time he cases a jump.
    "And a 2010 epic was a good bike in its time, but would a 2011 boxxer really modernize it that much?"

    The answer is yes, it will. Anyone who buys a modern bike is a sucker. The industry keeps pushing out new "innovations" to the masses, but really it's all marketing bs. Adding a dual-crown boxxer to a ten-year-old superlight 26" xc race bike will accomplish the exact same thing. I challenge anyone to tell the difference between that and the latest generation of progressive trail bikes in a blind test.

    You keep talking about shearing off the headtube, but carbon is stronger than aluminum, and plenty of downhill bikes are made of aluminum and I don't see them shearing their headtubes off. So if an aluminum downhill bike can handle a boxxer, then surely a superlight carbon xc bike can handle one too. Case closed (no pun intended)

    You say it will handle like poo. I say one mans poo is another mans downcountry berm blaster.

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  13. #13
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    you realise that an epic is a really light (for the time) XC bike...I'd think that any aluminium DH bike designed to take a 200mm fork is waaay stronger in the headtube than a carbon bike that is designed to be as light as possbile and take a 100mm fork.
    That is not to say it will, but carbon is very good at doing things it is designed to do, but not so good at doing things it is not designed to do, but it is a possibilty-- well maybe not snap the headtube off, probably fail mid tube somewhere, but effectively the same.

    also i'm not pointing the finger at carbon, i have carbon bikes (also steel, aluminium and titanium), I don't expect them to break, but know they can...and putting a 200mm triple clamp fork on any material pure XC bike is not a good idea. Will it break, well you won't know till you try it, but if it does, it will be catastophic to the frame and probably to the rider. Just an all round bad idea.
    All the gear and no idea.

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    Quote Originally Posted by mik_git View Post
    you realise that an epic is a really light (for the time) XC bike...I'd think that any aluminium DH bike designed to take a 200mm fork is waaay stronger in the headtube than a carbon bike that is designed to be as light as possbile and take a 100mm fork.
    That is not to say it will, but carbon is very good at doing things it is designed to do, but not so good at doing things it is not designed to do, but it is a possibilty-- well maybe not snap the headtube off, probably fail mid tube somewhere, but effectively the same.

    also i'm not pointing the finger at carbon, i have carbon bikes (also steel, aluminium and titanium), I don't expect them to break, but know they can...and putting a 200mm triple clamp fork on any material pure XC bike is not a good idea. Will it break, well you won't know till you try it, but if it does, it will be catastophic to the frame and probably to the rider. Just an all round bad idea.
    This is nothing but hyperbole and speculation.

    Just because it's a lightweight xc race bike doesn't mean you can't install a boxxer and send it. Don't believe the marketing hype.

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  15. #15
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    I think increasing the front end height/travel a little is a fine idea. There's a point at which it might just be too much, but you (OP) know better than us exactly what you'll do with the final product. No way I'd do it, but if you hate it, you're just out some money.

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    Thanks guys making alot of sence* I believe there is truth between @mik_git and @GT87

    I work with alot of material and where @mik_git ses could put extra strain on bike.. I believe it 100% to a point of breaking I dont know.

    @GT87 100% on the marketing BS I believe it aswell.

    I got a few options thanks for the clarification* will post what I have decided.
    If I go dh I can always fabricate bottom pins so I can reduse travel to 100mm. Will drop the front end to standard.*

    I got another two options to the dh forks it is the fox 32 or rockshock sid both or for the 27.5 inch tyre.. I dont see any problem with that..

    Whould you guys say going my other options would be better than the dh fork?

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    Quote Originally Posted by 519Franco View Post
    Thanks guys making alot of sence* I believe there is truth between @mik_git and @GT87

    I work with alot of material and where @mik_git ses could put extra strain on bike.. I believe it 100% to a point of breaking I dont know.

    @GT87 100% on the marketing BS I believe it aswell.

    I got a few options thanks for the clarification* will post what I have decided.
    If I go dh I can always fabricate bottom pins so I can reduse travel to 100mm. Will drop the front end to standard.*

    I got another two options to the dh forks it is the fox 32 or rockshock sid both or for the 27.5 inch tyre.. I dont see any problem with that..

    Whould you guys say going my other options would be better than the dh fork?

    Sent from my SM-N970F using tiny.cc/Mtbr_android_app
    Boxxer or sid... hmmm, tough call, maybe just flip a coin... can't go wrong either way.

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  18. #18
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    Quote Originally Posted by GT87 View Post
    Boxxer or sid... hmmm, tough call, maybe just flip a coin... can't go wrong either way.

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    Boxer and SID are 2 sides of the same coin...

    Or is it boxer and rigid?
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  19. #19
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    At this point I literally think you should abandon this project and sell the bike and get a different setup that is more suitable for your riding style.
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  20. #20
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    plus side the rid has a remote lock out

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    Quote Originally Posted by 519Franco View Post
    plus side the rid has a remote lock out
    Oh, well in that case go with the sid. Boxxer won't have remote lockout, so that'd be the deal-breaker for me

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  22. #22
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    Quote Originally Posted by 519Franco View Post
    Hi I got a 2010 specialized sworks epic .. very nice bike with the e100 brain fork ... the fork works good but if I take a few jumps I drop from 125psi to 80psi... if I ride normal it hold 125psi the whole time.. only losses pressure when iam jumping any thing I can..

    We do mostly trails.. road and offroad not very much downhill.. dont have facilities where I stay..


    I can get one for a good price and it will look good on bike. Reason why I want dh fork is looks..

    I dont know if it would work on my bike and the conditions I ride.. I believe the dh fork has no lock out... I dont know if that would be an issue.

    My question is could I put a down hill fork in or not?
    Ok don't do this. Most bikes come with recommendations as to the size of fork you can put on them. If this came stock with 100mm of travel, you could probably get away with 120-125mm of travel. Any more and you begin to stress the headtube area of the bike. As an already old bike, added stress is probably not desired. Factor in that the dual crown would require a through axle, which your bike will not have, and you will need a new front wheel, and you will need to add a new hose for your brakes, which means buying a new hose and then bleeding the brakes, plus this fork will probably require a larger front rotor than the 160mm stock rotor you have now.

    So at this point you have purchased new fork, wheel, brake hose, oil, bleed kit, rotor and will have stressed your frame to a point the manufacturer wouldn't have warrantied it if this was 2010 and it was new.

    There are probably options to rebuild your fork so it holds air, though I don't have company recommendations. A good quick release fox fork would be a nice replacement though even those are getting difficult to find.

    Finally I am assuming that the SWorks is a carbon frame and not designed in the headtube to take the hit from a dual crown like a carbon DC fork equipped bike would be, so the fun thing would be dropping the bike or crashing and having this upper stantion crash into the top and bottom tube and wondering whether you created a weak spot. The good news is the bike will let you know if you did eventually.

    BTW a sid is an XC style fork, not intended for serious or even not serious jumping. Get a good AM fork. From the era a Fox Vanilla or moving to a fox 32 in the travel you require with the proper travel, however you still may require the brake hose lengthening and bleed.
    I like your bike

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