So that the carbon stays can move. They’ll give the frame a little more flex. Also, if there’s similar at the top, so that you can easily replace a broken stay
DrSendy on
That’s actually a bushing. It is so the rear triangle can flex and absorb bumps better without cracking.
If you look at a linkage driven single pivot you can see how it allows movement in the rear triangle. Given that it is carbon fibre they can build flex into the rear triangle to flex in one direction. Clever stuff.
umgrybab on
Only to hold the frame together.
This looks like an old carbon frame where they bonded the aluminium ends into carbon tubes. The rear dropouts are made where the two pieces from the seat stay and chain stay are bolted together. If you took the bolt out and tried to ride it, it would break.
Juksari on
Likely an opening for a belt drive.
I am not sure about the structural strength benefits people have pointed out so far. But I am interested in knowing, is this screw featured on the drive side only?
ChanceGuarantee3588 on
That’s there, so you can open up the rear triangle in order to fit a belt, instead of a chain.
6 Comments
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So that the carbon stays can move. They’ll give the frame a little more flex. Also, if there’s similar at the top, so that you can easily replace a broken stay
That’s actually a bushing. It is so the rear triangle can flex and absorb bumps better without cracking.
If you look at a linkage driven single pivot you can see how it allows movement in the rear triangle. Given that it is carbon fibre they can build flex into the rear triangle to flex in one direction. Clever stuff.
Only to hold the frame together.
This looks like an old carbon frame where they bonded the aluminium ends into carbon tubes. The rear dropouts are made where the two pieces from the seat stay and chain stay are bolted together. If you took the bolt out and tried to ride it, it would break.
Likely an opening for a belt drive.
I am not sure about the structural strength benefits people have pointed out so far. But I am interested in knowing, is this screw featured on the drive side only?
That’s there, so you can open up the rear triangle in order to fit a belt, instead of a chain.