front derailleur not shifting to middle ring

hammerite
hammerite Posts: 3,408
edited May 2008 in Workshop
Not sure if this is a problem or not! I certainly can't remember this happening before!

I have a triple, when I'm in the top cog of my rear cassette and bottom ring of the front chainring I cannot change up onto the middle ring at the front. The chain starts to cath, bu tthen slips off.

I can only change up to the middle ring when I move the onto the 4/5th smallest ring of the rear cassette.

I know some gear combinations make it more difficult to shift, but I can't remember this happening before. Is this normal?

If it isn't, any tips on how to remedy this?