Thread title caught my attention because I wanted to see if there were indeed instances where an 'ultralight' bat was of any benefit. I was surprised that 33 posts in, no one had broke it down to the facts based on real and readily available data (Google 'bat speed research') until post 34 by Tictac020. Well done, though in the last sentence he says it's "JMO" and while he may have learned this on his own and used "JMO" for that reason, he has plenty of company. It's confirmed in every study of bat speed vs mass ever done. There are NO studies with contrary data by anyone. Before all the studies came out, I answered a tiny ad from a start up custom aluminum bat maker and spent an illuminating 30 mins. talking it's sole employee/owner, Ray Demarini. He was making his bats, one at a time, (in his garage I think he said) and you would call him and tell him how you wanted. Ray, wouldn't just take your order, though, he would tell you what you should want in a bat and why. We agreed on every aspect of bat construction, from the knob to the end cap, until we got to weight. I was a bat/mass guy who had been using a 38oz Easton. Ray explained that IF you could swing a 38oz bat at the same speed as a 26oz (you can't, btw), then yes, a 38oz would hit a ball further, since that's impossible, bat speed trumps mass, up to a point. All those studies, done years later, proved Ray was correct. I don't know if he was first in this regard, but he certainly was one of the first. When I said, up to a point, I mean that there is a max. bat weight that each person must find for themselves where he/she can generate optimal results. Bat speed is the single most important factor but it can't be assessed in a vacuum, as you also need mass. Do you think you can hit a ball for any distance with a hollow bamboo stick swung at 100 mph? So, you must sacrifice a small fraction of your bat speed to add mass until you find your ideal combination. Another factor, as mentioned above, is that to resist bat deflection at impact with a lighter bat you need strong wrists (again, think bamboo stick). All the above assumes you have good mechanics. No bat will correct poor mechanics. When Ray convinced me to drop down in weight from my 38oz to a 28ox (he really wanted me to go all the way to a 26oz) it temporarily screwed up my mechanics as my shoulders got out in front of my hips till I adjusted. We all change over time and now at 60 I wanted to reassess what is optimal for me, so I bought two bats of the same model, one at 26oz, the other a 30oz. At this point in time, I drive the ball at higher BBS with the 30oz, the added mass compensated for the (minimally) slower bat speed and a slight loss of wrist strength that occurred somewhere between 55 and 60 (nothing you can do about arthritis). The 26oz had greater deflection at impact so less BBS and therefore less distance. But I wasn't satisfied with that as the final word on it, so I bought a third identical model bat at 28oz and that was the 'sweet spot' in the speed/mass combination for me at this time. (I found the other two bats nice homes in case you were worried.) If you want to really know the answer then find out for yourself by putting in the work. No one else can give it to you. So what if you have to buy three bats to find the one. Take your time as you have to get used to the different weights anyway, (however many swings that takes) till you know you have maxx'ed out that model and weight. Then go up or down in weight and do it again. Keep the best, sell the rest. Heck, I actually came out slightly ahead because the guys watching me hit with 'em knew the bats were not duds but also, like many, fall into trap of conflating 'wand' with 'wizard', "Oooh, can I try your bat?". Finally, when adding weight to your bat, add it where it does the most good, at the end of the barrel. I know the argument for using a balanced bat, "I have better control!", but unless you're truly feeble, an end load has higher MOI (remember, you're going to look it up,?) therefore resists deflection, resulting in higher BBS and distance. That's a benefit even if you are a 'Punch and Judy' hitter (that's not a knock, I'm a fan, love seeing you guys on base when I get up) At least try dropping down an oz in total weight and adding at least an half oz back (Miken's "Maxload" designation) as end loading. Which reminds me that I need to get a hold of an 'Ultramax' with the 1.5oz EL. I'm loving the 'Supermax' 1oz EL but another half oz at the end? Gotta test it out. I don't post often because I come here to learn from you guys about product experiences, particularly gloves and bats. (Thank you to Vinci thread and you Miken guys who pointed me at the 2014 DC-41. I never get tired of oppos screaming, "Check the bat ump!") This is a passion I have studied my whole life (well, since I was 10) and an opportunity to contribute.