A 34 front and 11 back on a 29 is the same as a 32 front and what virtual size cog on the rear of a 26?
this is quite helpful;
[url= http://www.bikecalc.com/gear_inches ]http://www.bikecalc.com/gear_inches[/url]
[edit] you'll be looking at about a 5 tooth cog on the back with a 32 at the front.
34x11 on a 29er gives you 88.8" depending on tyre size. The closest you get with a 26er using a 32 chainring is a 10t sprocket that gets you 86.3".
It's simple maths !
(26 x 32) / (29 x 34 / 11) = 9.3 teeth.
Now, that [b]assumes[/b] your 26" wheel really is 26" in diameter (nominally a 2" tyre) and your 29" wheel is 29" (which nominally works out to a 2.25" tyre). If they're not then you need to adjust accordingly.
Thanks. I've always reckoned I'd go single chain ring if they did a 9 tooth cog.
On my 29 that's a reality with a 34.