Short answer - 35's
Longer answer:
The 'expert independent advice' seems to be trending towards use of wider tires for road/trail cyclists. While there is no uniformity in such opinions, I am a convert - but at 69 yrs I put a premium on comfort.
In addition to tire width, the key criteria for me include:
~ trade-off between suppleness of tire / puncture resistance / durability (I favour 'suppleness');
~ tread pattern (heavily dependent on when/where one is riding);
~ rim width (again, I favour the wider rather than narrow rims)
~ 'actual installed' width of tire vs 'nominal-on-package' width
~ tire pressure (also little uniformity of opinion - I favour lower rather than higher.)
~ price (I am fortunate in being able to regard this as being of lower importance).
General rules I suggest re tires (only my opinions - worth what you pay for them)
(i) get best quality you can afford
(ii) width no narrower than you currently use, and likely wider (upto width accommodated by bike specifications)
(iii) pressure no more than you currently use, and likely lower
Last edited by FamilyMan007; 10-02-16 at 06:12 PM.