Dropout/fork questions
#1
Junior Member
Thread Starter
Join Date: Oct 2017
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Dropout/fork questions
I'm gathering gear to build my first fillet brazed frame. I see several dropout styles.. breeze, socket, plug-in, tabs. What dropouts are intended to be fillet brazed? Are any a no go for fillet brazing?
Same question for forks. It looks like most the crowns are sockets. Can these be brazed with bronze or do they need to be silver brazed? I'm considering just buying a carbon fork. Any recommended sources? Are there any headset considerations that need to be addressed while in the planning stage?
Thanks!
Same question for forks. It looks like most the crowns are sockets. Can these be brazed with bronze or do they need to be silver brazed? I'm considering just buying a carbon fork. Any recommended sources? Are there any headset considerations that need to be addressed while in the planning stage?
Thanks!
#2
Senior Member
Join Date: Feb 2012
Location: Rochester, NY
Posts: 18,073
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4201 Post(s)
Liked 3,857 Times
in
2,305 Posts
As I have moved to more fillet work and less lugged frames I too think about the aesthetics of mixing a socketed crown (shell, drop out) with the smooth surfaces of a fillet. One trick I use is to round off the socket points, fill in any non round cut outs and add round holes to the socket surfaces. See above.
Tabbed drop outs allow you to use many different stay/blade ending treatments. I tend to shy away from socket or plug drop outs as I like the freedom to fashion as I please.
There are a few plug type crowns out there. Most are rather heavy, being often solid VS hollow. Not many are for wider rims/tires.
Check out my Flicker albums for various other images. https://www.flickr.com/photos/73195587@N00/albums Andy
__________________
AndrewRStewart
AndrewRStewart
#3
Randomhead
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Posts: 24,396
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Liked 3,696 Times
in
2,517 Posts
I wouldn't worry about the crown or the dropouts. An internal crown is not newbie friendly. I find using brass (lfb) for things like lugs and socketed crowns to be somewhat unsatisfying. Just not used to it, I suppose. It takes a lot of heat to flow LFB into a sleeved joint of any kind.
I like tabbed dropouts, but it is a tiny bit easier to mess them up. For example, it's a lot easier to clock the seat stays properly with socketed dropouts.
You can get an ounce of silver and a pound of silver flux for less than $40. I think it's a good idea. 45% silver probably makes the most sense if you aren't doing lugs.
I like tabbed dropouts, but it is a tiny bit easier to mess them up. For example, it's a lot easier to clock the seat stays properly with socketed dropouts.
You can get an ounce of silver and a pound of silver flux for less than $40. I think it's a good idea. 45% silver probably makes the most sense if you aren't doing lugs.
#4
Banned.
Join Date: Jun 2004
Location: Torrance, CA
Posts: 3,061
Bikes: Homebuilt steel
Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 2193 Post(s)
Liked 425 Times
in
337 Posts
For a fillet brazed frame an internal socket fork crown would look good (my opinion). And tab style dropouts. Fillet brazing is less newbie tolerant than using lugs so be sure to practice some before putting heat to your real frame tubes.
As for carbon forks, Henry James sells Columbus forks for fair prices.
As for carbon forks, Henry James sells Columbus forks for fair prices.
#5
Randomhead
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Posts: 24,396
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Liked 3,696 Times
in
2,517 Posts
Nova and framebuilder supply also have Columbus forks.
#6
Senior Member
Join Date: Aug 2012
Location: Seattle
Posts: 507
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 103 Post(s)
Liked 144 Times
in
88 Posts
For a newbie/ first frameset, a carbon fork is a good idea (IMO). Especially if you're asking questions about dropouts and how to attach them. Steel forks are also heavy so, this is a good place to save weight if that's a concern.
__________________
https://www.flickr.com/photos/54319503@N05/
https://www.draper-cycles.com
https://www.flickr.com/photos/54319503@N05/
https://www.draper-cycles.com
#7
Randomhead
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Posts: 24,396
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Liked 3,696 Times
in
2,517 Posts
I agree about buying a fork. OTOH, I would like to urge the OP to buy some tubing and practice with it before they start building frames. Assuming they haven't done that already.
#8
Junior Member
Thread Starter
Join Date: Oct 2017
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
I picked up a new Synapse carbon fork that was labelled as a straight 1 1/8 steerer. Now that I have it, it looks like a 1 1/8 to 1 1/4 tapered steerer. Anyone know of a headset that will work with a standard 34mm ID headtube?
#10
Senior Member
Join Date: Feb 2012
Location: Rochester, NY
Posts: 18,073
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4201 Post(s)
Liked 3,857 Times
in
2,305 Posts
A simple measurement will remove the question of what the steerer really is. Have you contacted the seller? Was the fork purchased with a "no refund" clause? (As in on sale or scratch and dent sale). Andy
__________________
AndrewRStewart
AndrewRStewart
#11
Junior Member
Thread Starter
Join Date: Oct 2017
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Theres a definite step towards the bottom. I just Googled Synspse forks and they popped up 1 1/8 to 1 1/4. It's an Ebay purchase but was quoted 1 1/8 so I can probably argue it but might be out shipping. The price was decent and it's brand new so I'd like to make it work if there's a solution.