Hi,
as being said, layers are the trick. We are carrying three pairs of
underwear - two for hot weather and one for cold. Then a light jumper, a nice windstopper soft shell, warm inlay for our jacket/pants and a cooling inlay for the jacket. That pretty much covered it all up to now.
Getting the right set of jackets/pants is quite a big thing to chew on. Go shopping or get all the stuff delivered back home and try various sets. In the end you have to feel god in it. I have been selling bike gear back home for a few years (if you ever visited Germany, you might know Polo) and in the end the happiest people were those who did not compromise but got the stuff that was comfy and safe. Unfortunately that often goes with quite a high price tag -
if you want to safe some bucks, buy in winter or right at the end/beginning of a new riding season, as there are more special offers.
Whatever you get, get something that
fits tight, unless you are wearing a complete protection suit underneath. Keep in mind, that all this nice protection gear just works if it stays where it is supposed to be - I have a nice scar on my elbow, that reminds me what happens if the protector slips in a loose jacket...
Also, if you are doing a good deal of road riding, make sure you get something that has
leather or super fabric or at least aramide on the elbows, knees and, if you can find it, bum. These are the spots you are most likely to slide on, and simple cordura, no matter what strength, will burn away on the asphalt.
You will want
protectors in your elbows, shoulders, hips and in the back. Make sure these are
soft protectors, the stuff that feels like soft foamy rubber Hard foam and aluminium protectors are not bad but only work once. The material takes in the hit and crimps and thereafter is rendered useless or at least a lot weaker for the next fall. As you will be traveling for a while, chances are you hit the dust once or twice and it would be a pain - quite literally ;-) - if the second hit is not softened by your protectors.
Saying you are riding in various temperatures you should make sure you have
proper ventilation. Most membrane fitted ("gore-tex"-)jackets and pants come with well advertized ventilations systems. Unfortunately most of them just ventilate off the membrane - the nylon ("cordura-") layer is zipped open, but the membrane is still completely closed around your body for waterproofness. This does work, but just as long as the membrane works, which is only the case if the temperature outside is considerably lower than inside the jacket. Otherwhise you just keep heating up, and with maybe 30+°C and high humidity outside this only works as long as you are riding and cooled by the wind - once standing you are soaked in sweat within seconds.
IMHO there are two types of jackets, that work as being rainproof and properly ventilated: Those which have a
detachable zip-in membrane, where you can take out the whole waterproofing layer if you don't need it and those that have a
ventilation system that opens up the membrane.
The former are pretty easy to get nowadays, as more and more manufacturers jump in the market. Their big plus is maximum ventilation (mostly due to mesh openings) if the membrane is removed. Cons are two: you have to remove or add the whole layer whenever it starts to rain or gets really hot. Also the membrane is more likely to get damaged if you store it somewhere on its own in between your cooking gear and an old pair of pliers...
The latter are harder to come by but pretty good, although they do not reach the same amount of maximum airflow as the zip-ins. Big pluses are that you do not have to worry about that extra layer and can just open and close the vent as you please. Really handy if you ride in hot and wet conditions.
So much for that.
As you have been asking for a specific tip - we are currently going around the world in Rev'it's new Poseidon combination. Luckily they sponsored us, as I would honestly never have been able to buy that thing. They are bloody expensive but work like a charm (and they don't pay me to say that.)
They are currently using our pics on their website, if you feel like it have a look:
REV'IT! - Homepage.
If I had the money I would buy the stuff, as we have used it for so far five months of riding, from 4°C and rain in Germany to over 45°C in Iran and some deep mud off-roading in Thailand (keep in mind, proper underwear is a must).
In the end, don't forget it comes down to the fit. Don't buy anything you have not tried on before.
Make sure all the protectors fit as they should, with only a t-shirt on and with all the winter layers - therefore find something that is adjustable. If you have a good store around (the kind that takes time and helps you trying and fitting stuff, not those who just want to get your money and kick you out) go there, talk to the people and spend an afternoon trying. It's well worth it.
If you have any questions send me a pm. =)
Juri