Originally Posted by
cyccommute
What kind of tent are you carrying? A 21.3 L bag is on par with a very large sleeping bag stuff sack. I put my pad, sleeping bag (even the 20° bag), and pillow into a 15 L stuff sack. My tent bag volumes are 3.7 L for a single person tent (10cm x 48 cm, 4" x 19") and 4.5 L for the two person tent (11cm x 47cm, 4.5" x 18.5").
Assuming the same pole length, your bag would be 9" in diameter. I can see why you went the compression route, but I can't see why any tent for bicycle touring would be need to be 9" packed diameter. And the poles don't stuff at all.
A 2-person Sierra designs, Lightning 2 (older model double wall). The tent is about 3.5 lbs.; while not an UL tent it is compact and light enough. IMO the bags tents come in from the manufacturer are more suitable for storage than when in actual use. Shipping bag's sizes are variable, and depend on the manufacturer; bag size has very little to do with actual tent size.