First off, many of the generic chin-up bars out there are absolute junk. Both the Iron Gym Extreme and 90X bar have an extensive track record with enthusiasts. So these two bars are the only obvious choices out there. It’s highly possible there are some obscure workout bars out there that are just as good, but there’s no reason to seek a needle in a haystack.
Not every door frame is a worthy choice. Consider the fact that supporting the entire body weight of a person is no easy task. You need to carefully measure your doorway and compare it with the dimensions of the pull up bar. The 90X bar works with doorways up to 32 inches wide. The Iron Gym claims to go up to 34 inches but in practice it is more like 32 inches. Ideally you want a few inches to spare for extra support, so if your door is 30 inches wide or less, you are among the lucky ones.
The P90X bar touts its ability to support up to 12 different grip positions. The Iron Gym is identical in this respect. The grips are all placed in the same way. Beside minor cosmetic differences, the design of these bars is close to identical. The all-black P90X does look a little slicker and more refined.
One major difference between the P90X chin-up bar and the Iron Gym Extreme is price. Currently the P90X bar by Beachbody sells for a touch over double what the Iron Gym costs.
Both bars have a good solid feel once mounted. Components tend to loosen up over time so you’ll need to tighten screws here and there if you want to retain the sturdiest feel possible. The screws on the P90X model were inclined to loosen quicker as they are undersized compared to the Iron Gym.
One common complaint with the Iron Gym is the low quality of the screws, bolts and nuts. If you are above 200 lbs. this may start to become as issue as there are reports of the screws snapping. So are you in the clear with the more expensive P90X? Not quite. The hardware might break with this model as well. Either way, you’ll want to have some backup hardware on hand in case something snaps. Replacements are cheap and readily available at any hardware store so this isn’t a biggie.
It’s hard to find any obvious differences in quality between these pull-up bars as both are incredibly similar. Neither product is perfect as screws tend to loosen over time and have a chance of snapping – this is simply the nature of the beast. Some simple maintenance is required.
The price factor makes the choice obvious. The Iron Gym Extreme is just as good and sells for less than half the price.