having never been up a mountain i am a bit worried about gearing - as far as i know , the max i can do is 34 29 although i did hear of a 33 inner ring but that might be myth - do the more seasoned mountain goats think this will be ok ?
if i am pushing the bike up i will be jabbing a stick in the spokes of people coming past
usually i am on 38 27 max and dont struggle too much on a normal hill
You should be ok running 34x29.
I've ridden in the Alps, Pyrenees, Dolomites and Mallorca and I've done all those with 34x28 max and I mistakenly used a 34x25 on one trip!
There's a key difference to riding mountain passes in Europe compared to riding hills or passes in the UK. Most of the European mountain passes rarely get above 10% gradient.
There are some notable exceptions, such as the Zoncolan and some climbs such as the Ventoux, Marie Blanque and Portet d'Aspet have sections above 10%, but many big climbs max out at 10% and most average around 7% over the length of the climb.
I was told this is because most of them were built as tracks and the gradient was to allow horses to haul carts over the passes. So, they didn't tend to build roads up stupid. short steep routes like we do in the UK.
The most important thing to do on a mountain climb is to get into a steady rhythm that you're comfortable with and can sustain. If you're going to climb 19km up the Tourmalet (which I'm guessing you will do as you're off to the Pyrenees) then you've got to accept you'll be climbing for around 1h 45m, maybe more. For that you need a gear that isn't too big, but neither do you don't want to spin at too high cadence as you won't be able to sustain it.
34x29 should allow you to keep enough steady even pressure on the cranks to get you to the top. Remember to ride at the pace you feel comfortable with. Don't chase others, but don't slow down to let others stay with you, as that can be just as difficult as going too hard. You can always regroup at the top or anywhere on the way up.
If you get the pace and gearing right, that helps you get over the fact that riding uphill at 8 to 10% for 1h 45 minutes takes a fair bit of mental effort as well......... but when you get to the summit, it will all be worthwhile! And you get the descent to make up for your efforts........... although it took me a while to get the hang of descending!
Oh and the Pyrenees is great. Weather can be more changeable than the Alps, but I prefer it. Very green, pretty and some nice small towns, bars and cafes. Where are you guys staying?