I recently found these two threaded bosses below the chainstay near the bottom bracket on my 1995 Trek 950 frame. Thread seems to be M5.
I can’t really figure out the purpose of them. If they would be for a chainstay mounted U-brake, their position would be wrong. U-Brakes are mounted with one central whole, aren’t they? So what else could it be?
by Ok_Relation_7506
7 Comments
parking leg?
Anti-chainsuck thingee attachment point!
Kickstand?
For a chain guide. Here’s another Trek frame with pictures.
https://bikelist.com/listings/95-trek-930-ice-cyan-blue-195-true-temper-ox-comp-cro-moly-26er-usa-1010119886
Mount for an anti chain suck thingy. Like so:
https://preview.redd.it/mgv1c8yegqee1.jpeg?width=1080&format=pjpg&auto=webp&s=5fe3a1a9c56b7164702b9f01aa7335d3543bc8e1
Another related question – say we removed our anti-chainsuck thingy, do we want to find shorter screws to put in here or is it ok to leave them open?
Speed holes