I've got a new fully today, and there is one attachment point on the frame that I cannot identify. Perhaps it's a silly question, but I've given up after 20 minutes of googling :)

enter image description here enter image description here

  • Looks like a cable guide, maybe for a dropped seat post cable?
    – Kibbee
    May 9, 2018 at 15:06
  • 2
    Here is an image of the mount in use. not sure what the part is. Looks like it may be for a chain guide. Someone with more mountain bike knowledge could fill in the details.
    – Kibbee
    May 9, 2018 at 15:09
  • Its definitely on the Right Hand side of the bike, not centered. Which implies its related to the chain and transmission.
    – Criggie
    May 10, 2018 at 0:19
  • Can we have more information about the bike, model and year?
    – george
    May 10, 2018 at 7:54

1 Answer 1


It is for mounting a front derailleur. A standard clamp on front derailleur will not fit on that seattube, so an alternative mount point is needed.

  • 1
    Are you sure? It seems much too high for that. Looking at my road bike (so, sure, not an MTB), the front derailleur mount is only a couple of centimetres above the height of the big chain-ring, whereas that mount seems to be almost a whole crank-length above the admittedly very small chain ring. May 9, 2018 at 15:42
  • Direct mount mounting point is quite high and the derailleur reaches downward from there. Check for pictures at for example bikeradar.com/mtb/gear/article/…
    – ojs
    May 9, 2018 at 15:49
  • 2
    @ojs OK. But meh to bikeradar. They refuse to let me view their site with an ad blocker and, if I take the option of watching one ad to get an hour's ad-free access (which sounds like a great idea), they just waste my time by showing a 30s unskippable ad for... themselves. May 9, 2018 at 17:26
  • Looks like there's already a chain keeper in place, which is likely mounted to the BB.
    – Criggie
    May 10, 2018 at 0:20

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.