This is a pic from last year but having rebuilt the bike over Winter I keep looking at it in the stand and the fork "appears" to be bent back a little. Either that or its an illusion due to the tapered headtube of the Jeffsy? What do you reckon?
Is there a decent way to check it with the fork out of the frame??
Thanks guys
your sisters chainring, and a saddlebag on a Jeffsy and your worried about your crooked forks? have they ever been past the rubber ring on the right leg?
Yawn.... Go on Mumsnet perhaps bud for your moan?
Anyway.... And helpful opinions?
Drawing a straight line through them. I’d say yes.
No idea about this kind of science. Haha.
But if you have a very flat table and two excellent round "tubes". Can't you put the two tubes onto the table and then the fork stanchions onto the two tubes (I mean 90 deg crossing).
And then you are able to measure from table top to underside of fork steering tube?
No idea if I understand you right and no idea if these measurements would make you sleep better. Above might be a silly proposal. No idea.
They do look that way, but I’d bet on it being a bit of an optical illusion, it would be really obvious in the flesh.
i also would bet its an optical illusion.
i've seen it before, several times, but when i've checked by taking the forks off the bike, they were always straight.
Cheers guys, the forks are off to J Tech soon so will have a good look at it off the bike before it goes.
I think it's the slope of the head tube that makes it look odd. Worth a check though. 😃
Get one of those angle measuring apps on your phone. Place phone against front of fork stanchion and take the angle, turn bars 180 degrees, place phone on the same place (now measuring the back of the stanchion) if the forks are straight the reading should be the same.
I'm not sure about that, I think the fork offset and dropout position would change the angle a bit.
TBPH, from the pic, if there was damage anywhere I'd expect it in the head tube unless I'm not seeing the same problem as everyone else? Again though, it would be really obvious in the flesh so probably not...
It looks like there’s a slackset been put in the wrong way round. Weird!
The angle measuring approach will work, but you need to clamp the bike in a stand with the front wheel off the floor before you do it.
A straight line as best i can doesn't run though the middle of the steerer clamp but that could just be the wheel being turned fractionally. If anything it looks like a bad bearing or crown race seat or something like that.
If it rides fine it's fine...
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<div>Get one of those angle measuring apps on your phone. Place phone against front of fork stanchion and take the angle, turn bars 180 degrees, place phone on the same place (now measuring the back of the stanchion) if the forks are straight the reading should be the same.
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You sir are a genius.
That's a great idea and I see how it works regardless of offset. The only thing that would throw it is a fork that is offset via mounting stantions at an angle at the crown.... Or if the fork is bent!
Just used an app with the bike in a stand and twisted the fork 180 deg..... and within 0.1, the angles are the same. Allowing for the intrinsic errors I am introducing it's fair to say the forks are straight. 😃
Thanks for the help once again guys!
Clever stuff mate, what did you use to grid the pic?
Looking from the line at the very back of the NDS stanchion it does indeed look to run parallel to the stem spacers. Obviously a bit of a crude assumption due to the nature of my pic. Not your method! 👍
It's funny I often think forks look a bit bent in some photos of bikes, but I think it's because of the tapered headtube, your eye follows the line of the taper which would appear to go in a line forwards of the forks.
It's a cropped screenshot of the image in the GIMP with the rotation tool in action, corrective mode selected and a high grid lines value.
^^ Thanks for info mate, handy to know.
Not used Gimp in ages. Will have to reinstall it as I used to like it a lot. 👍
