Shimano chainring size

SteviePCommencal
SteviePCommencal Posts: 120
edited April 2012 in MTB workshop & tech
I currently have a 2012 Xt chainset with 28 and 40 tooth rings. I thought they wouldn't be too much different to my old chainset but I miss my my super low first gear.

My question is, can I change the granny ring to a 24 or 26 or will this bugger the shifting?

Cheers!