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Is this fork too big? Trying to understand these more.

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Is this fork too big? Trying to understand these more.

Old 07-06-05, 02:47 PM
  #1  
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I was on ebay looking at frames just for kicks and giggles and came across this one. This seller posted a pic of the frame on his bike so the other folks viewing the auction know what it CAN look like.

Is his fork too big or do I just have no idea what I'm talking about? I just kinda looked at it like "Dude, wtf."

http://i2.photobucket.com/albums/y36/Roasted/6a_1_b.jpg
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Old 07-06-05, 02:54 PM
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I think it's fair to say that fork is a tad big for that frame. And by a tad, i mean waay to big.
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Old 07-06-05, 03:18 PM
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Does this fork make me look fat?
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Old 07-06-05, 04:24 PM
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Yeah that's not right
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Old 07-06-05, 05:01 PM
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Just to clarify, the bike containing that frame would have a much much greater chance of something snapping on it, correct? (whether it's the headtube or something along the fork).
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Old 07-06-05, 05:05 PM
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Originally Posted by Roasted
Just to clarify, the bike containing that frame would have a much much greater chance of something snapping on it, correct? (whether it's the headtube or something along the fork).
In addition to being really uncomfortable to ride that bike is likely to snap on the headtube welds.
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Old 07-06-05, 05:20 PM
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Originally Posted by Raiyn
In addition to being really uncomfortable to ride that bike is likely to snap on the headtube welds.
Are there bikes more suited for forks such as those? I'm just not understanding what would possess someone to do that. It reminds me of those inner city people who like to put fart tubes on every single vehicle they drive, whether it's a 3 cylinder Geo Metro or a Camaro.
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Old 07-06-05, 08:09 PM
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I'm not a freeride guy so i might be wrong.. but isn't that the setup favored by some freeriders?

I guess that frame may be inadequately reinforced at the headtube though.
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Old 07-06-05, 08:45 PM
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Originally Posted by robo
I guess that frame may be inadequately reinforced at the headtube though.
inadequately reinforced? I'm sorry can you elaborate a little more?
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Old 07-06-05, 08:59 PM
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dual crown forks (the ones with the fork tubes, called stanchions, that run almost to the handlebars and are "clamped" both below and above the head tube) put a lot more stress on the front end of the bike than a normal single crown fork. add to that the particular fork on that hardrock (a bike designed for a 4" single crown fork) a 7" or 8" dual crown, and the bikes geometry is totally out of whack. the bottom bracket is raised up several inches, as is the whole bike, which its not designed for. you can design any bike around a long travel fork, and putting a very low single crown on it will make it ride just as bad.
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Old 07-06-05, 09:09 PM
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^^ i'm not sure if that's correct. I don't see how a dual crown itself puts more stress on the headtube welds. However, dual crown forks tend to be long, and this is what puts more stress on the head tube welds, since there is more leverage with a long fork. Long forks are made dual crown because all that leverage can make a single crown flex or break.

Bikes designed for long forks generally have extra material welded on around the head tube/top tube/down tube connections for extra strength. I doubt the low end frame in the photo has this reinforcement, which makes the chances of the head tube snapping off on landing a jump rather high.
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Old 07-06-05, 09:20 PM
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its all got to do with the leverage that longer fork produces. Similar to the way a cheater bar works. So if i was to put a monster T on my homegrown frame, it would without a doubt rip out the headtube. Since the monster T is much "taller" than my 80mm SID
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Old 07-06-05, 09:27 PM
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and may that bike rest in peace
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Old 07-06-05, 09:41 PM
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Originally Posted by phantomcow2
and may that bike rest in peace
It's still on eBay with a bid on it.


I don't know what that bike went through but I wouldn't trust it.
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Old 07-06-05, 09:47 PM
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I think i will have a bit of fun and see what he says about the fork on it..Ill ask if it in any way would compromise the integrity of the frame from him riding on it with that fork...Ill do it later..
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Old 07-06-05, 10:20 PM
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single crowns are far less stiff in the steerer tube than dual crowns- its very simple. a single crown has one 1 1/8th" steerer tube above the crown, and thats it. its not the stiffest setup in the world. a dual crown however has 3 tubes- the steerer and 2 stanchions, and is very stiff, and moves as a single unit to put stress across the entire head tube. single crowns concentrate most of the stress on the lower part of the head tube, and very little at the top. a single crown fork is also much more likely to fail at the steerer/crown interface or the stanchion/crown interface than a dual crown fork, which on an un-reinforced frame will more than likely just shear off the head tube rather than the fork breaking.
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Old 07-06-05, 10:37 PM
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Originally Posted by phantomcow2
its all got to do with the leverage that longer fork produces. Similar to the way a cheater bar works. So if i was to put a monster T on my homegrown frame, it would without a doubt rip out the headtube. Since the monster T is much "taller" than my 80mm SID

Just by looking at that bike, I wouldn't feel safe jumping it. However, does this longer fork (in comparison to a standard mountain bike) REALLY make the chances of the headtube breaking off that much higher?
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Old 07-06-05, 10:42 PM
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y-e-s spells yes! The geometry just isn't ment for a dual crown.

Last edited by madbiker555; 07-06-05 at 10:55 PM.
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Old 07-06-05, 11:31 PM
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Yes, the fork is too big for the frame.
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Old 07-07-05, 07:55 AM
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Originally Posted by Roasted
does this longer fork (in comparison to a standard mountain bike) REALLY make the chances of the headtube breaking off that much higher?
If you just rode the bike around like a chopper it probably wouldn't break.

But the subtext here is that the look and feel of a big fork invariably encourages aggressive riding, bigger drops, faster hits, and dare I say it, some hack moves.

Before you know it, you're supplying plenty of force to the end of that big lever on the head tube.

Last edited by ghettocruiser; 07-07-05 at 07:56 AM. Reason: clarity
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Old 07-07-05, 02:26 PM
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If you think thats ones bad:

http://www.pinkbike.com/modules/phot...w&image=450166
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Old 07-07-05, 05:33 PM
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i wish i had a picture, but my friend has a 13 inch Kona Chute frame with a 2003 Jr. T. on it. It actually doesnt ride that bad, lets just say you have to get real used to it, before doing anything big.
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Old 07-07-05, 06:58 PM
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i have a 2 dual crown bikes, and i think both ride quite well. for taller people, having the front end up higher feels very nice and makes the bike a lot easier to play around on.
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Old 07-07-05, 06:59 PM
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the chances of a headtube being teared off are higher with that frame. Chances are its weakened already. Theres nothing wrong with double crown forks as long as you've got the right frame for it
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Old 07-11-05, 12:28 AM
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Over $100 now with 3 bids on it...
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