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Best DH chain stay length

Best Chainstay length

  • 17

    Votes: 8 38.1%
  • 17.25

    Votes: 7 33.3%
  • 17.5

    Votes: 5 23.8%
  • 17.7

    Votes: 0 0.0%
  • 18

    Votes: 1 4.8%

  • Total voters
    21

SPINTECK

Turbo Monkey
Oct 16, 2005
1,370
0
abc
What's the best chain stay length??


Why don't more DH bikes offer adjustable chainstay lengths?
 

bballe336

Turbo Monkey
Mar 3, 2005
1,757
0
MA
You can't specify a best chainstay length, especially when other factors of the frame have an equal effect on how it handles.
 

SPINTECK

Turbo Monkey
Oct 16, 2005
1,370
0
abc
assume all other things being equal, for downhill racing.

or

elaborate- your favorite length chainstay and bike linkage/suspension type.
 

demo 9

Turbo Monkey
Jan 31, 2007
5,910
46
north jersey
i say that because my demo 9, not that i know what it is is alot shorter than my 303 and its easier to manual over bumps and the dirt jumper is shorter than that and it is easier too
 

Fulton

Monkey
Nov 9, 2001
825
0
assume all other things being equal, for downhill racing.

or

elaborate- your favorite length chainstay and bike linkage/suspension type.
all other things being equal makes it worse. when you change a chainstay length, changes need to be made to other aspects of the geometry to keep the bike neutral. that being said, something around 17.5 allows for plenty of tire clearance, and usually keeps the tire clear of the seat tube, is long enough to maintain stability, and still short enough, to make the bike "flickable"
 

Fulton

Monkey
Nov 9, 2001
825
0
i say that because my demo 9, not that i know what it is is alot shorter than my 303 and its easier to manual over bumps and the dirt jumper is shorter than that and it is easier too
that could have as much to do with axle path as it does chainstay length
 

boone

Monkey
Jun 27, 2005
362
0
thanks.

why aren't there more adjustable rear wheel drop outs on DH bikes?

Now this should have been the title of your thread in the first place :busted:
I for one would like to know this as well.

Is it just because it adds more weight...too complicated...easy to break??

Seems like it would make for a very versatile bike for some riders.
 

Fulton

Monkey
Nov 9, 2001
825
0
Now this should have been the title of your thread in the first place :busted:
I for one would like to know this as well.

Is it just because it adds more weight...too complicated...easy to break??

Seems like it would make for a very versatile bike for some riders.
simplicity, more things to design, fabricate, loosen up, flex, go wrong. Would increase weight and manufacturing costs.
 

Fulton

Monkey
Nov 9, 2001
825
0
On that same note, with alot of bikes using bolt on dropouts now, I wouldn't mind seeing different dropouts that adjusted chainstay length
 

kidwoo

Artisanal Tweet Curator
all other things being equal makes it worse. when you change a chainstay length, changes need to be made to other aspects of the geometry to keep the bike neutral. that being said, something around 17.5 allows for plenty of tire clearance, and usually keeps the tire clear of the seat tube, is long enough to maintain stability, and still short enough, to make the bike "flickable"
Yeah whatever


17 or under:monkeydance:
 

SPINTECK

Turbo Monkey
Oct 16, 2005
1,370
0
abc
Whatever length is my 2004 Bullit .Without going back out in the garage to measure i'm guessing 17.25".
That's a great simple frame. Wow,

Bullit- the new ones have a claimed 17.0 chainstay, 14.3" BB, 41.9" wheeelbase and 67.5 head angle

Nomad- 17.5 chainstay 14.2BB, 42.7 wb and 67 ha

V10 - 17.4 chainstay 14.8 BB, 43.4 wb and 67 HA

On paper that Nomad looks great, wonder why I don't see more of them.

BB on V10 seems high, must count on a lot of sag.