[nauc]

the bent chainstay. why isnt it like the other side? is it so the chain doesnt hit the frame as much or what ?

 

[Harold]

chain slap

 

[chazpat]

Can't see much in your photo but a lot are dented in for chainring clearance.

 

[detsortehul]

I have a third answer
It enables wider tires.

 

[Schulze]

It's so they can have a short chainstay on a bike with big fat tires. You might notice that if it were higher, there is very little room between the chainring and tire.

Other strategies are (for metal bikes) having that junction machined as one piece so it can be thinner, then welding it to a tube after it clears the chain ring. Or, putting the ds stay above the chainring like the Trek Stache.

The Super Boost 157 strategy is to push the cassette out, so then the chainring can be pushed out and give more clearance for the stay.

 

[Nat]

Chainring clearance.

And for general sass.

 

[Lone Rager]

Yep. No room between the tire and the chainring for the chain stay. The other option is a high chainstay, like on the Trek Stache.

 

[chuckha62]

+1 for Chain Slap

 

[Scott O]

Conversation starter.

 

[BlueCheesehead]

Here is a better picture showing how it is bent downward:

 

[DIRTJUNKIE]

+1 for Chain Slap

Sad, the owners will be missing out on such pleasant sounds.

 

[DIRTJUNKIE]

Here is a better picture showing how it is bent downward:

4th answer: Makes for a more rigid frame in terms of torsion.

 

[chuckha62]

Sad, the owners will be missing out on such pleasant sounds.

Ring, Ring! Hello?

 

[DIRTJUNKIE]

Ring, Ring! Hello?

I'm here, how can I help you?

Ahh..you are "for" chain slap, missed that.

 

[tfinator]

It's so they can have a short chainstay on a bike with big fat tires. You might notice that if it were higher, there is very little room between the chainring and tire.

Other strategies are (for metal bikes) having that junction machined as one piece so it can be thinner, then welding it to a tube after it clears the chain ring.

Marin Pine mountain is an example of this.

Sent from my Moto G (5) Plus using Tapatalk

 

[tfinator]

4th answer: Makes for a more rigid frame in terms of torsion.

Why would it do that? If that were the goal wouldn't they do it to NDS too?

Sent from my Moto G (5) Plus using Tapatalk

 

[mack_turtle]

this allows room for a big tire, a chainring, and short chainstays. Salsa solved the problem thusly

Trek Stache

Specialized

 

[Truckee29]

this allows room for a big tire, a chainring, and short chainstays. Salsa solved the problem thusly
View attachment 1249536

Trek Stache
View attachment 1249537

Specialized
View attachment 1249539

But Salsa is not the originator of the elevated chainstay design. I remember seeing those on Nishiki's back in the 90's

https://forums.mtbr.com/vintage-retro-classic/elevated-chainstay-bike-history-questions-590280.html

 

[scottzg]

But Salsa is not the originator of the elevated chainstay design. I remember seeing those on Nishiki's back in the 90's

https://forums.mtbr.com/vintage-retro-classic/elevated-chainstay-bike-history-questions-590280.html

nobody said salsa was the originator. Yeti was doing them in the 80s too, as was brave. Kinda lame solution, imo.

 

[Truckee29]

nobody said salsa was the originator...

Thanks. I'm aware of that.

Back to OP question: That chainstay form is to provide chainring clearance. That's all