Drill 650 to 700C?
06-08-07, 10:03 AM
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Drill 650 to 700C?
Is there some reason that if I have a carbon fork with 650 dropouts that I shouldnt just drill it to 700 size for use on 700 wheels?
thanks
Gene
thanks
Gene
06-08-07, 10:07 AM
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Huh? The axle diameters for almost all front hubs are 9 mm diameter no matter what the rim size is so "drilling the dropouts" doesn't do anything. A 650 rim is smaller in diameter than a 700 rim so you would have to lengthen the fork blades to make it fit. I really don't understand what you are proposing.
06-08-07, 11:08 AM
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I wouldn't take a drill to any fork, regardless of the reason. Forks take a lot of stress and a structural failure is almost always painful.
It would be interesting to know what the OP is proposing to do. The question, as stated, doesn't seem to make any sense.
It would be interesting to know what the OP is proposing to do. The question, as stated, doesn't seem to make any sense.
06-08-07, 11:23 AM
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Originally Posted by roadfix
This is not a trick question.
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06-08-07, 11:56 AM
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Originally Posted by g7777777
Is there some reason that if I have a carbon fork with 650 dropouts that I shouldnt just drill it to 700 size for use on 700 wheels?
thanks
Gene
thanks
Gene
Show me some reference to a dropout on a bike ever being referred to as having a size like 650 or 700....
....I'm not saying it's impossible, but after 25 years fixing bikes, it's the first time I've seen it....
<still scratching>
06-08-07, 04:36 PM
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Originally Posted by g7777777
OK well if you drill the top of the fork so the wheels fit into the drop out- would that work?
06-08-07, 04:45 PM
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Originally Posted by Stacey
Run for cover. They coming!!!
06-08-07, 06:16 PM
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I understand what he's trying to do.. He doesn't have enough clearance for a 700c wheel on his 650 fork and wants to know if he can remove material from the bottom of the crown (I believe this is the right word) so that it'd fit.
I think the only way this would be an acceptable solution is if the fork were steel, had an actual crown, and you only needed to file 2mm or less for it to fit. Framebuilders actually do this kind of thing all the time on track bikes.. see the photo
But all this about drilling? I don't think that'd be a good idea. At least use a dremel.. if you don't have much to take off, use a hand-file.
I think the only way this would be an acceptable solution is if the fork were steel, had an actual crown, and you only needed to file 2mm or less for it to fit. Framebuilders actually do this kind of thing all the time on track bikes.. see the photo
But all this about drilling? I don't think that'd be a good idea. At least use a dremel.. if you don't have much to take off, use a hand-file.
06-08-07, 07:14 PM
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Originally Posted by Boss Moniker
I understand what he's trying to do.. He doesn't have enough clearance for a 700c wheel on his 650 fork and wants to know if he can remove material from the bottom of the crown (I believe this is the right word) so that it'd fit.
I think the only way this would be an acceptable solution is if the fork were steel, had an actual crown, and you only needed to file 2mm or less for it to fit. Framebuilders actually do this kind of thing all the time on track bikes.....]
I think the only way this would be an acceptable solution is if the fork were steel, had an actual crown, and you only needed to file 2mm or less for it to fit. Framebuilders actually do this kind of thing all the time on track bikes.....]
06-08-07, 07:31 PM
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He might have 5/6" of clearance already, so he'd only need to remove 1/6" (random numbers..). Who knows. One of my road bikes has... (measures)... 7/8" clearance between the tire and the bottom of the crown.
But I did re-read the original post, and turns out the guy has a carbon fork. My advice is definitely a bad idea in that case.
But I did re-read the original post, and turns out the guy has a carbon fork. My advice is definitely a bad idea in that case.
06-08-07, 08:53 PM
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Even if it does work (which I highly recommend against, especially with carbon) the brake will probably not line up (assuming this is for a bike with front brake).
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06-08-07, 09:54 PM
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Originally Posted by g7777777
it would be less than 1/16th it looks like- they nearly fit now-
06-09-07, 02:26 AM
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Originally Posted by FlatFender
Yeah, if it were steel, id tell you to go for it.
Carbon. Hell no.
Carbon. Hell no.
Since carbon is what you have, consider getting a 700c fork and putting in there if you want to go to larger wheels.
06-09-07, 07:25 AM
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Maybe you could try a smaller tire? If it's just 1/16, then you probably shouldn't have a problem..
And yes, make sure your brake would line up (you can test this without a tire).
And yes, make sure your brake would line up (you can test this without a tire).
06-09-07, 07:33 AM
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I think if you can get the wheel to fit that the brakes wouldn't align with the rim.
