Singlespeed & Fixed Gear - MTBing with courier bag?

I'm gonna go mountain biking soon, and was wondering if any of you have ever been mountain biking with a courier bag? How is it? Any tips?

I guess I'll go first.....

Nevermind.

I think it'll depend on what type of courier/messenger bag you are using. I have use a Chrome Mini.Metro that hugs your back and has an additional strap for stability, I've been MTBing once with it. As long as it's not really full or heavy, it's no worse than using a Camelbak. It gets kinda gross though because I sweat a lot. I think it's a bad idea to use any courier/messenger bag that isn't specifically made for biking since it will move around too much and get in your way.

why would you do that?

I think it'll depend on what type of courier/messenger bag you are using. I have use a Chrome Mini.Metro that hugs your back and has an additional strap for stability, I've been MTBing once with it. As long as it's not really full or heavy, it's no worse than using a Camelbak. It gets kinda gross though because I sweat a lot. I think it's a bad idea to use any courier/messenger bag that isn't specifically made for biking since it will move around too much and get in your way.
Mine is a Chrome metropolis. Mine is generally not full, but has a decent weight to it.

why would you do that?

Well, when school starts, I'll be using my courier bag as a school bag, and anyways it has all my tools and stuff in it, and I wouldn't want to leave it in school.

Well, when school starts, I'll be using my courier bag as a school bag, and anyways it has all my tools and stuff in it, and I wouldn't want to leave it in school.

So are you using a few trails on your commute or actually mtbing? One is fine the other is going to suck.

So are you using a few trails on your commute or actually mtbing? One is fine the other is going to suck.

I'm commuting to school on roads, and at lunch I normally go to a large forest near the school. It has MTBing trails, but just small jumps, no logs or anything harder.

i've done it, it's not ideal. for jumps you're either going to have the bag really tight, or it's going to bounce on your back. i much prefer mtbing with no bag, or failing that with a 2 strap backpack.

depending on how your area is set up, you can sometimes ride to a spot, put the bag down and get rad for awhile, then put the bag back on and keep going. that's usually a good time.

I'm commuting to school on roads, and at lunch I normally go to a large forest near the school. It has MTBing trails, but just small jumps, no logs or anything harder.

commuting := bag
lunchtime := locker

commuting := bag
lunchtime := locker

I don't really trust putting my stuff in lockers. We can't have padlocks, so someone can see your combo. The locks we use can be cut easily.

I might keep it in my locker if I could lock my locker with my kryptonite evolution mini.