Instruction: Given a question and the related document, predict if the question is answerable based on the information provided in the document. Output only yes or no.

Input:
Question: What is the distance from the back of the bases to the pull up bar?  I'm guessing around 30 inches from looking at the side view picture.
Document: It worked ok, but wasn't the best. Anyway, after a lot of looking around I decided to get the Body Vision PT600 Power Tower because of the price and the many great reviews that it received. I always wanted a dip station and a solid pull-up bar, and I am very happy with my purchase. It was very easy to assemble. I leisurely put it together myself one night after work in about an hour and a half or so.
Also, make sure the 4 lock nuts on the back side are really right.now I don't find it wobbly at all (for being ion a carpeted floor and I can't recommend more.I'm extremely satisfied with my purchase and I hope will be too.
This machine is very sturdy, I'm at 230 pounds and stocky, I have no problems using it in any way whatsoever. With a stockier build, I have a wide back, etc. yet this machine doesn't get in the way at all with any exercises. The gauge of the metal is thick enough that it doesn't sway, creak, or feel like it's weak.The assembly was very easy too, it took me 30 minutes to put it together, and it's very straightforward.
this is a machine that i have a love ,hate relationship with, just what i expected, takes up a lot of room, and is very tall, the diameter of the grip bar is 2inches and 3/4, the frame crossing the grip bar is about 21-22 inches apart, so its makes wide grip pull ups difficult, d/t where you place your hands, if your tall, ( i'm 5''6), i think it might be ok
my younger brother turned me on to this machine he's been working out for 30 years I wanted something for my abs he recommend this machine.I like it it's easy to move around and clean around would recommend to anyone.
I'm 6'3" and 225lbs, medium build. This works fantastic for any of the workouts. Is completely stable and have no issues with rocking. Doing dips, facing the tower, your head will hit the bar if you keep your head up. I just bend my neck to lower my head and can fully extend on dips without issue. Might not be absolutely perfect form, but does the job. Ample padding on back and forearm supports when doing knee raises.
When I'm done doing pull ups, I can easily place myself in the position to do leg raises without a second thought, nor excuse for the matter. No walking about in search for a good piece of equipment to work the abs. This station is exactly what I was looking for. Furthermore, the assembly was a cakewalk!
After looking at different options at amazon.com and elsewhere, and decided that this is the right one for me. The product was about 1 hour (2 people) to put together.It is very stable and feels very solid. The space saving design of having everything on 1 side is a big plus.
Price was right, specs looked good, so I bought it. It took about 2 hrs to put together. It was a great investment. I've been doing P90X for a over a yr using bands for the back exercises. I needed to step up my work out in doing pull-ups/chin-ups, so I looked at the PT600 Tower and I'm glad I did. It's worked out for me.
We decided on this tower after looking all over the net for different models. We also went to various local stores looking at different options. Between Amazon's price and free shipping, this was the best deal. It arrived about 6 days after we ordered it. The assembly was easy enough. It took my fiance and I about 30 minutes to put it together. The packaging was good and there were no missing parts. Based on the packaging, even a hole in the box would probably not lead to lost parts.
Answer: no