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Trying to get my carbon fork from 43 to 45 mm rake -- correct heating temperature?

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Trying to get my carbon fork from 43 to 45 mm rake -- correct heating temperature?

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Old 01-14-15, 06:19 PM
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Do you have a pic of the fork after the re-rake, but without the new carbon wrap?

Last edited by Self Evident; 01-14-15 at 06:19 PM. Reason: minor typo
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Old 01-14-15, 06:19 PM
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Originally Posted by ljsense
. . . But I don't imagine Henry Ford or the Wright brothers got it exactly right on the first try. . .
The accomplishments of Ford and the Wrights are well known. Please tell us what you think you have accomplished. Do you think trial and error guided them as it guides you?

Originally Posted by ljsense
. . . Fingers crossed!
Yes, that's what you need, considering you know neither how much you weakened that fork, nor how much you might have strengthened it.
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Old 01-14-15, 06:22 PM
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But I don't imagine Henry Ford or the Wright brothers got it exactly right on the first try. So I am pushing on with this undaunted and I have some initial photos to show.
......../QUOTE]

Link to wright brothers first fatal plane crash

Wright Brother's First Fatal Airplane Crash

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Old 01-14-15, 06:39 PM
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Originally Posted by ljsense
Is that weed matting that you've wrapped around the fork legs?

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Old 01-14-15, 06:41 PM
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Originally Posted by cobba
Is that weed matting that you've wrapped around the fork legs?
Without vacuum bagging and proper prep, weed matting will work just as well as crabon fibre.
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Old 01-14-15, 06:58 PM
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Enve 2.0 fork is nice... I still say you could have sold it and got another.. 43/45 is nearly impossible to notice the difference anyways. Wish you luck on the carbon wrap.. I don't think you need to vac bag it ... but personally I'm still in favor of that fork being in the dumpster (broken)
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Old 01-14-15, 07:15 PM
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this is ********.
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Old 01-14-15, 07:24 PM
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Originally Posted by spdntrxi
but personally I'm still in favor of that fork being in the dumpster (broken)
Don't worry - you will get your wish pretty soon.
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Old 01-14-15, 07:27 PM
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if it's not a put-on, the OP's an experimenter is all.

if so, i'm just surprised that he or she would want to expose him or herself to ridicule on an international forum. shows self-confidence anyway. good luck.

Last edited by hueyhoolihan; 01-14-15 at 11:05 PM.
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Old 01-14-15, 07:30 PM
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Originally Posted by hueyhoolihan
. . . shows self-confidence anyway. . .
Or something.
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Old 01-14-15, 07:37 PM
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4 pages already?
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Old 01-14-15, 07:56 PM
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4 pages already?
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Old 01-14-15, 07:59 PM
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Wow I glanced over this post an can not be leave that this was done, but hay its your bike and well being.
I really hope nothing happens later over time.
A layer over the fork is not really going to make it stronger either.
I would never be able to ride with confidence knowing what was done here but that's me I guess.
Also I really do not think you would have even know you had a 43 rake fork on that bike, I would of left it as it was.

Best of luck to you!.
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Old 01-14-15, 09:14 PM
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Originally Posted by GENESTARWIND
this is ********.
Yep. Pretty sure this is a put on. The "bending jig" in the pic doesn't match the description. Showing a wrapped fork doesn't show the flame damaged fork. A fetishist for "the right way" to build up a bike wouldn't tolerate a totally crapped looking fork slathered in epoxy.
Assuming this person is for real I was going to try to appeal to his experience riding where someone won't find their body as they've gone off into a ditch or off a cliff do to a failure at high speed, or simply missed vital advanced medical care on the way to the hospital. But I bet I'd be talking to a troll.
I and a friend had a bike shop 35 yrs ago. He sustained a significant head injury at low speed that cracked his skull and put him in a coma for 2wks and ICU for another. Took him a few years to recover. Been on a few rides where someone crashed and we were there to get him help/home. Same with races. Where emergency care was nearby.
There's too much wrong with this story.
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Old 01-15-15, 04:53 AM
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Originally Posted by Shimagnolo
Go shopping the online stores for a road fork. 43mm-45mm is pretty much a defacto standard, so I would expect most frames to be designed to work with rake in that range.
Well, that's a large part of my point.
It's a common enough value, and we can't tell from here whether it was chosen by default, or as a result of test riding some alternatives.

Or maybe when the frames were ready for assembly, the manufacturer was offered a better deal on 45 mm forks than on 43 mm.

If 45 mm was a default decision, and assuming that riders are sensitive enough to correctly detect a 2 mm difference in rake, maybe some riders would actually prefer the 43. And there's probably someone out there who would have liked 47.
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Old 01-15-15, 07:34 AM
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Originally Posted by ragtoplvr
There must be thousands of epoxy formulations out there, different cures, different ratio, different flexibility, different adhesion. It stands to reason that some are more able to be hot formed than others. Unless you know what one the mfg used, which is most likely a closely held secret, you are taking a shot the dark. Shots in the dark get folks hurt.

Rod
Epoxy resins all fall into the theromset category. They polymerize in an irreversible crosslink and, generally speaking, the idea is to drive the cure to completion. In other words, they aren't meant to be melted and reformed. The crosslinking is extensive enough that thermosets can't be recycled. They simply don't melt. Phenol/formaldehyde (Bakelite) resins crosslink extensively enough that they won't sustain combustion. They self-extinguish. Although I haven't tested it, I suspect that the epoxy resins used for carbon fiber would have a hard time maintaining combustion as well.

You are correct that hot reforming a carbon fork shouldn't be done, however. 'Tis a silly idea.
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Old 01-15-15, 08:13 AM
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Originally Posted by LeeG
I and a friend had a bike shop 35 yrs ago. He sustained a significant head injury at low speed that cracked his skull and put him in a coma for 2wks and ICU for another. Took him a few years to recover.
Sounds a lot like my first employer, although I realized later he never fully 'recovered' - he had no sense of smell and was paranoid and somewhat delusional.
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Old 01-15-15, 10:33 AM
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.
...this is why people have such a low opinion of hockey.
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Old 01-15-15, 11:08 AM
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I can't believe that no one has mentioned how small 2mm is. Measure that out for a second, and then think about how much that will change the ride of the bike.

Troll or not, this thread delivers
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Old 01-15-15, 11:42 AM
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If your pipe bursts and the stream of water cuts a hole in the drywall you do not simply patch the drywall.
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Old 01-15-15, 11:43 AM
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This gives new meaning to the flame icon next to thread titles.
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Old 01-15-15, 11:58 AM
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Originally Posted by ljsense
Oh, to your question. The build sheet on this Serotta says it wants a 45 mm rake. I just want this build to be right.
Originally Posted by ljsense

Even if it handled ok, having the wrong rake would have always nagged at me though. I'm sure there's a reason why they called for a 45.
...there are some very effective medications for this now.

Originally Posted by woodcraft
The fork might cumple.
...this sounds dirty.
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Old 01-15-15, 12:01 PM
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Originally Posted by Wilfred Laurier
Sounds a lot like my first employer, although I realized later he never fully 'recovered' - he had no sense of smell and was paranoid and somewhat delusional.
...I once lost my sense of smell for a few months. It was terrible, but thankfully I recovered. Sadly, the paranoia and delusions persist.
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Old 01-15-15, 12:36 PM
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2mm is .080" or, in laymans terms, just a hair more than 1/16". Very small in the scheme of things.
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Old 01-15-15, 12:56 PM
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Originally Posted by ljsense
I have a really nice Serotta with a build sheet that says it takes a 45 mm rake fork. But I have a 43 Enve 2.0, so I've been reading about epoxy and experimenting with ways to just gently bend that fork a bit deeper.
If you really think a difference of 2mm in rake will cause a huge difference in handling, you may be more insane than you seem.
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