Dear Guest,
Please register or login. Content don't create itself!
Thank you
-
To bridge or not to bridge, that's the chainstay question
Well, the post title says it all, but...
¿What's your own personal opinion on road frame chainstay bridges?
Absolute must for performance? fatigue risers?
Yes? no? wtf?
talk to me
-
Re: To bridge or not to bridge, that's the chainstay question
Traditionally, they are (were) there for bracing a fender. Then, the multi-use unit morphed in a racing machine (late 1960s and through the 10 speed bicycle boom in the early 1970s). The brace was never questioned as for its being there, unused. Folks say it adds strength. I don't believe it as something that a human being can discern. I got used to the aesthetic element of a lapped bridge on a 22.2mm round stay so my bicycles had them. When I switched to oval stays in the late 1990s, I ceased brazing them in atmo.
-
Re: To bridge or not to bridge, that's the chainstay question
Seems that, once again, think don't follow applies
Thanks
-
Re: To bridge or not to bridge, that's the chainstay question
My powertap hub can discern no meaningful difference in peak watts on bridgeless bike vs a bike w/ a bridge.
-
Re: To bridge or not to bridge, that's the chainstay question
Here is a thread with contributions from eRichie, Curt Goodrich, Dave Anderson, and Frank the Welder:
http://www.velocipedesalon.com/forum...dge-27065.html
-
Re: To bridge or not to bridge, that's the chainstay question
Originally Posted by
Pi Guy
Sorry for not having do the homewrok first, lazy me, guilty on all charges.
-
Re: To bridge or not to bridge, that's the chainstay question
Originally Posted by
Amaro Bikes
Sorry for not having do the homewrok first, lazy me, guilty on all charges.
No worries, I just remembered it because I participated in that thread a little. I wasn't trying to call you out. I think it's a neat topic. I also think it's interesting that FTW takes a different stance than the other framebuilding heavy weights in that thread.
-
Re: To bridge or not to bridge, that's the chainstay question
In my very limited building life (barely a fetus compared to the mature builders here), I've only added a chanistay bridge with a fender mount.
DT
http://www.mjolnircycles.com/
Some are born to move the world to live their fantasies...
"the fun outweighs the suck, and the suck hasn't killed me yet." -- chasea
"Sometimes, as good as it feels to speak out, silence is the only way to rise above the morass. The high road is generally a quiet route." -- echelon_john
-
Re: To bridge or not to bridge, that's the chainstay question
I didn't notice a difference without chain AND seat stays. That was a thru axle rear end. Very limited sample size though.
-
Re: To bridge or not to bridge, that's the chainstay question
in the ANSI frame stiffness test protocol RFC-0U812 (squeeze the unsupported dropouts towards each other) it scores higher marks with a bridge than without.
seriously, the trapezoid is completed by the rear hub.
Nick Crumpton
crumptoncycles.com
Instagram
"Tradition is a guide, not a jailer" —Justin Robinson
"Mastery before Creativity"—Nicholas Crumpton 2021
-
Re: To bridge or not to bridge, that's the chainstay question
Originally Posted by
crumpton
in the ANSI frame stiffness test protocol RFC-0U812 (squeeze the unsupported dropouts towards each other) it scores higher marks with a bridge than without.
seriously, the trapezoid is completed by the rear hub.
I don't completely understand the ANSI rationale for testing a frame without an integral part of the system (hub or axle).
-
Re: To bridge or not to bridge, that's the chainstay question
Originally Posted by
Will Neide
I don't completely understand the ANSI rationale for testing a frame without an integral part of the system (hub or axle).
because it was a joke. just assumed the second sentence cleared that up.
Nick Crumpton
crumptoncycles.com
Instagram
"Tradition is a guide, not a jailer" —Justin Robinson
"Mastery before Creativity"—Nicholas Crumpton 2021
-
Re: To bridge or not to bridge, that's the chainstay question
Originally Posted by
crumpton
because it was a joke. just assumed the second sentence cleared that up.
Gotchya....just realized the OU812.
-
Re: To bridge or not to bridge, that's the chainstay question
I wanna tell you bout my good thing
I ain't disclosing no names but--
He sure is a good friend and!
I ain't gonna tell you where he comes from, no!
If I tell you you wont come again! Hey!
I ain't gonna tell you nothin but I do will, but I know, yeah!
I should do but I know now let me tell you bout my girl:
Open up a newspaper and what do I see? Ahh, ah
See my girl, ah, looking at me
Ooh, And when she walks, Ooh, lemme tell ya:
She walks and when she talks, she talks and
When she looks at me in the eye
She's my baby lord I wanna make her mine
Tell me baby what you want me to do!
You want me to love you, love some other man too?
Ain't gonna call me Mr. pitiful, no!
I don't need no respect from nobody...
I ain't gonna tell you nothing I ain't gonna no more, no!
She's my baby let me tell you that I love her so and
And! She's the woman I really wanna love
And let me tell you more, oooh!
She's my baby she lives next door
She's the one a woman the one a woman that I know.
I ain't gonna... tell you one thing that you really ought to know ooh!
She's my lover baby and I love her so and
She's the one that really makes me whirl and twirl!
And she's the kind of lover that makes me me fill the whole world and
She's the one who really makes me jump and shout, ooh!
She's the kind of girl--I know what it's all about!
Take it take it
Excuse me
Oh will you excuse me
I'm just trying to find the bridge... Has anybody seen the bridge?
(Have you seen the bridge?)
I ain't seen the bridge!
(Where's that confounded bridge?)
The Crunge-Led Zeppelin
-
Re: To bridge or not to bridge, that's the chainstay question
I like bridges
I don't really care if they do anything or not
I have rediscovered my like for bridges
-
Re: To bridge or not to bridge, that's the chainstay question
I'm like most, I only put them in for fender mounts.
-
Re: To bridge or not to bridge, that's the chainstay question
Originally Posted by
Dazza
I like bridges I don't really care if they do anything or not
When you do them as nicely as those, i'm sure customers appreciate them as well - whether they do anything or not!
-
Re: To bridge or not to bridge, that's the chainstay question
How about seat stay bridges for disc bikes?
Seat stays can be quite a bit longer and are usually quite a bit smaller, is there a benefit for the stays in a disc bike? or is it just carried over from caliper brake frames?
M
Matt Moore
-
Re: To bridge or not to bridge, that's the chainstay question
Originally Posted by
Hellafab
How about seat stay bridges for disc bikes?
Seat stays can be quite a bit longer and are usually quite a bit smaller, is there a benefit for the stays in a disc bike? or is it just carried over from caliper brake frames?
M
I built two fairly identical MTB's. One with chain and seat stay braces and a quick release axle. The other without seat and chainstay braces and a thru axle. I, and a few other riders couldn't tell a difference. Both used the same chain and seat stays and both had chainstay mounted brake calipers (rocker dropouts......both were singlespeeds). Not a definitive answer to anything, but I felt pretty convinced given the size of the riders (150-175lbs) on rigid mtbs that the seat stay bridge was/is a carryover from caliper/canti/v-brakes.
With that said, I like the look of the seatstay brace, and still add it on most bikes.
-
Re: To bridge or not to bridge, that's the chainstay question
I always thought chstay bridges come from very old (1920s and before) frames where the chainstays came out straight then bent outwards, like many bmx frames have.
I remembered reading this Waltworks Bicycles: Random musings: do bridges matter?
I also remember everyone who had met the founder of my old shop saying he used to call the ch.stay bridge a rin-deboli, rather than rinforzo.
Ie. it makes it weaker (debole) rather than stronger (rinforzo).
Similar Threads
-
By werksmini in forum The Frame Forum@VSalon
Replies: 12
Last Post: 02-04-2015, 09:00 PM
-
By jclay in forum The Frame Forum@VSalon
Replies: 19
Last Post: 08-16-2014, 04:37 PM
-
By hgrd in forum The Frame Forum@VSalon
Replies: 22
Last Post: 09-09-2012, 06:58 AM
Posting Permissions
- You may not post new threads
- You may not post replies
- You may not post attachments
- You may not edit your posts
-
Forum Rules
Bookmarks