My frame requires a 1'' threaded headset, but a 1'' crown race is too big for my fork, so does anyone know where to find a crown race a little bit smaller than a 1'' im not sure of the exact size. Thanks
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Crown race question My frame requires a 1'' threaded headset, but a 1'' crown race is too big for my fork, so does anyone know where to find a crown race a little bit smaller than a 1'' im not sure of the exact size. Thanks |
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Is your frame Japanese? If
Is your frame Japanese? If so, NJS is what you're gonna need. Call NoBrakes.
Consult the guru first.
The frame is a motobecan i
The frame is a motobecan i bought from the sopo art show, it COULD be a different fork than the original though, I can't tell really.-Patrick Goral
take some calipers to it.
take some calipers to it. they could verily easily not match.
a similar post:
a similar post: http://fastermustache.org/node/5025
If your crown race is "too big" for your fork then its possibly the opposite of what Seth said. You may already have a JIS crown race (27.0 mm) and need to get a "standard" crown race (26.4 mm).
Some things I learned in the process: go to a bike shop with good (read: knowledgeable) mechanics. Have them measure the fork crown at different diameters. Like Gabriel said, circles aren't perfect.
ok, the fork also won't fit
ok, the fork also won't fit my a 1" quill stem. I mean it will go in about an inch and I can hammer it in but it will not go any further. I even took a wire brush and put it on the end of a drill and cleaned out the inside and I lubed it up properly. I may just machine the width of the stem down some towards the bottom. I still have yet to find a crown race that will fit, the one I am using is off of a standard 1" threaded headset. When I put it all together the bike works fine, it is just a little wobbly when I go over bumps and such.
that wobble is going to
that wobble is going to destroy any part that is wobbling. just fyi.
Motobecane is a French brand
Motobecane is a French brand (or was, but in your case is).
Take a look at this page:
http://www.sheldonbrown.com/headsets.html#size
Scroll down to the part where it lists the types of headsets... where it says 'French 25 mm'. Good luck.
I say buy a new headset (a good one, a new one) and buy a new fork (like a Kazane fork from No Brakes).
* - Just on a side note, why are you riding on a piece of art you bought at an art show???
wobble ≠ fine
wobble ≠ fine
review
When I put it all together the bike works fine, it is just a little wobbly when I go over bumps and such
that's not working fine.
If you are ok with the nexus of all tooth and face safety on your bike being "wobbly" and loose while you subject it to repeated impact strains I'd skip the metal fabricator and go straight to the behavioral therapist.
you are using parts that are incompatible with each other and trusting your well being to them. if you really really like the bike that much and really really want to ride it. you need to find the right headset (and for that matter the right stem. if you have to force it, you're doing something wrong). it's gonna be a shitty headset and it may not be that easy to find, but at least you'll have money to spend on more bike stuff rather than reconstructive plastic surgery.
Ok, I understand ya man. I
Ok, I understand ya man. I think I may just go with a new fork completely. Does anyone know where to find a pretty cheap steel fork?
Kazane fork from No Brakes
Kazane fork from No Brakes or an SSR fork from Performance.
do you know the prices?
do you know the prices?
Teh Googles has reported unto me thusly:
Threaded
thank you sir i think ill go
thank you sir i think ill go with the soma
or theres always something
or theres always something like this. $350 at 20% off is $280 which is probably less than you've spent on this thing already!
Hardly, I work at a bike
Hardly, I work at a bike shop and got all the parts from BTI for wholesale price.
frame + headset (2?) + new
frame + headset (2?) + new fork + wheels + bars + stem + cranks + bb + chain + chainring + cog + pedals + seatpost + seat was less than $280?
about $350ish in all and it
about $350ish in all and it is way nicer than that bike.
?
which shop?
http://a343.ac-images.myspace
http://a343.ac-images.myspacecdn.com/images01/39/l_b24ed32e77c9b6ee328c3... this is the bike before I wrapped the handlebars. I would replace the fork, but it looks so nice. Would it be possible to have a piece custom made from a fabricator if I had the correct measurements? It is a brand new 1" threaded headset. It doesn't wobble at all while riding, if I hit a substantial bump or like go off of a sidewalk I feel it move then its fine.
I'd predict that that
I'd predict that that looseness will destroy that brand new headset pretty quickly. it seems to me that it would be possible to create a shim for it, but I haven't come up with a good way to do it. perhaps try talking to Bobby Costello? I believe he does metal work.
I have no idea if this would
I have no idea if this would work in this situation, but I have heard good things when it comes to shimming handlebars by cutting up an aluminum can into the size you need. I don't have any first hand experience on this one, and it might not work at all for a headset though.
Reline 925 frames from 2007
Reline 925 frames from 2007 are apparently notrious for having poorly fitting seat tubes. A frame replacement didn't fix mine, so theres a redbull can in there. I don't even drink red bull.
I might actually try that
I might actually try that with mine now that I think about it. My specialized allez's stock seat post has that weird carbon wrap on it, and it makes the seat slide down. Might work until I can scrape enough together for a nice thomson post.
how exactly do i make a shim
how exactly do i make a shim for my crown race from a red bull can?
recycling
beer cans do in fact make good shims for seatposts and handlebars, but in both those cases you have a cylinder with a cut in it and a clamp to tighten it up.
in the case of a crown race, you do not have the benefit of a clamp, you have a solid ring that is typically bludgeoned into place (with the appropriate tool) onto a tightly fitting seat which has a smoothed lip for it to slide onto.
using a beer can shim for a crown race seat would not provide that smoothed lip and would thus probably bind as you tried to seat the race. in addition, since you don't have a clamp to take up any slack, you have to get the shim to the exact diameter you need to hold the race tightly. might be possible, but I would expect a lot of time and frustration trying to get the size and shape of the shim correct.
I'm thinking what if I were
I'm thinking what if I were to simply contact a fabricator about making a custom crown race, it is just one piece it shouldn't be too pricey
good ol' Sheldon
just found this idea:
If the crown race is loose, sometimes you can fix it by using a hammer and centerpunch to create a series of "craters" in the side of the surface that locates the crown race. The raised edges of the craters may be just enough to remove the slop.
here:
http://www.sheldonbrown.com/headsets.html
I would expect that only helps for a minimal amount of looseness.
What about a knurling tool?
What about a knurling tool? That's what I used to make my seat post fit my seat tube on my track bike. Same concept as above, but no hammering required.
I FINALLY broke down and got
I FINALLY broke down and got some cash together and bought a new fork