Alright I have no clue what upsweep and backsweep are on bars. Isn't Backsweep how far the bars bend back and upsweep how far the actual bars go up? because all bars feel pretty much the same to me even though they have different backsweeps.

Backsweep is the angle that they bend back towards you, and upsweep is the angle that they bend up, im not sure why upsweep makes bars better, but apparently people like them...

Backsweep i think makes your wrists more comfortable...

Both make bars more comfortable. Hold your clenched fists in front of you, palms down, elbows bent. Now relax your hands and wrists. See how your wrists naturally turn? That's backsweep. Now spread your hands apart, still relaxed, to bar width with your elbows straight. See the arc your hands made? That's what upsweep does for you.

Backsweep makes bars more comfortable sitting or low on your bike. Upsweep does the same thing while standing and cranking.

-Paul

I went from 5° to 12° of backsweep on my bike.

..and now, there is NO way I can comfortably ride a bmx with only 5° of backsweep, it just feels wrong, and hurts when hopping.

I think it's alot of personal preference though. The bars on my bike have like almost no upsweep / backsweep. One of my friends has bars with 12 degreees backsweep. I prefer the feel of mine, I can ride his and it dosent bug me all that much, but if I were to buy new bars I would try to keep them more straight like the ones I've got.

No upsweep, no downs sweep, as long as you know how to brace your wrists with your arms you dont have to worry about your wrists hurting. Or you could just ride no handed every where, which is quite helpful when you want to go through the drive through at mcdonalds, or flicking off eny persuing police.

If you ride Flat, then your bars probly dont have much backsweep. Becuase you would want them to feel the same forwards and backwards for all those weird tricks that i dont know the names of where you bars are backwards.

I have 8pc Geraldo bars, 0 Sweep, back or up.