My front derailleur (Shimano LX T670 / 34.9mm) has been stuck on the highest gear for a couple of weeks now which has got me thinking about how little I use it. To save weight could I replace my front derailleur with some sort of static chain guard/stay to keep my chain on the same chain ring? Does such a thing exist for three speed chainsets (Shimano T780 48Ax36x26 with chainguard)?
I am not ready to completely convert my bike to a single speed just yet as I imagine I could install the front derailleur back on if I decide to go on a more adventurous journey compared to the daily commute where its not needed.
While the FD is only 155 grams I do enjoy finding ways to save weight here and there, before you know it it's half a KG lighter. The problem with leaving it on is that the spring has rusted into place almost at mid shift, this causes the chain to rub the side of the chain guide which produces an annoying sound and causes it to occasionally jump to the middle chainset.
For now I have simply removed it but in the past on a different bike I suffered from chain jumping which is what I am trying to avoid by using a chain guide.