27.5 or 29

[HLaB]

29mph if you are trying to win a race. Doh, that's not what the title meant 😉

 

[Drago]

The reason I like 26'ers is because even if you run standard 2" wide tyres, they are still smaller than a 700c wheel on road tyres and if you compare just MTB-width tyres, a 26" wheel & tyre is about 10% lighter than a 29'er.

For my own part I prefer 26" for typical wet, claggy, British off road conditions. 29ers are nothing more than additional surface to clag up with mud, which then completely negates the slight advantage they may hold in other areas. Great in Marin Cou try, not so good in Buckinghamshire in February.

 

[Cycling_Samurai]

I'm 5 10 and I did say it will be a combination of road and off road

700c (29)