Roto Grip SD-73 Classic Bowling Ball

This ball has really helped me out in tournament play unlike any other ball in my arsenol. In this new age of bowling where the way that tournaments are making shots harder to score on is by applying longer and heavier oil; the SD-73 helps to combat these conditions. This is even more true for my game because I have very high ball speed which makes it harder for me to score on heavier oil patterns. When it comes to tournament play and PBA Experience leagues this is usually the first ball I will throw during practice to get an idea of just how oily the lane condition is. For obvious reasons this ball is pretty useless on house shot patterns, but if you are a serious bowler that enjoys competing at the highest level then there is no reason that the SD-73 Classic shouldn't be a viable option in your arsenol. -------------------- Mike Keily - Roto Grip Amateur Staff ROTO GRIP - King Of Them All!

I just got this ball last week and went to the local house for some practice to break it in before leagues. I am a stroker/tweener with a preference to play down and in on my normal league shot. The night I bowled I was playing at least five boards to the left with my feet and swinging it out in the oil. Wow, this ball was angular! I now feel I can play more inside if I need to. Need to keep the speed up and let it roll. Devastating. I will post later this year with results from league play. Nice job, Roto Grip! Posting now after half the year. Just shot a 740 on a nite that the oil held up. More strikes than ever! Another update: just shot 773, including a 299. Never missed the pocket all night! Ball was devastating. <s

Tried it box, highly polished on top of 1500, and 4000 dull. It took me 9 months but 4000 dull seems perfect for me. The box finish spent too much energy too early. The highly polished was just sloppy and the 4000 dull is perfect. I try to throw like Walter Ray and this finish works well on medium and up. It gets down the lane and flares beautifully. It burns just enough energy to get a great read on most conditions. If I loft it I can even play on light conditions (not fried). I'd take this over any asym. right now. You can tweak anything in your delivery and this ball will always finish strong. Forward roll gives me more angularity when I have some outside oil to work with. And playing deep inside with a bit more side roll and taking advantage of the high flare potential is where this shines. NOTICE: The higher rev players I know do well with the 4000 dull as well. The box hooks sideways and the polish is squirty for them as well. My layout was a mild stacked with no w

This has got to be the most fun I have ever had throwing a ball. Drilled 4x4.5,2000 abralon this ball easily flares 3/4 of the diameter of the ball when it gets anywhere near the hole THUNDER ROLLS. med heavy/heavy this ball is pure dynomite rips though carrydown as if it wasn't there. I thought that this ball would hook in my back swing but it's deceptivly long,but needs oil to respond, not many messengers they disappear to fast. when the heads start to go you'll know, put it away or pay. The house I play at puts down a 40' flat pattern ob outside 10 to 50' this ball laughs at the ob and rips the boards up out there. It's the only ball that makes it back from this no mans land.

Haven't put but 100 games or so on this ball because of the volume of oil needed for it to be effective. Went to a tournament a couple of months ago and nothing I had could deal with the lane conditions (was very similiar to the cheetah pattern) Took out this ball, moved wayyyy inside to the fresh oil, and as long as I was inside 10 and outside 13 (on my breakpoint) this ball was money. The point is this ball MUST have heavy oil. Keep your stroke smooth and consistent and this will consistently cut a path through the oil.

Drilled my Classic with a 4.5 " pin to pap and mb 45 degrees. Started with about 3"pin distance (to cg). With the box finish this ball rolled heavy, early and all the way --- hard. It had a tendency to burn off a little too much energy on the house patterns around my town so I put a compound shine over the box finish, which by the way, shined and smoothed this surface out in about 10 seconds on the ball spinner. Really easy to work on. I could now go around the world on the house patterns with devestation. On longer patterns I couldn't get comfortable. Too much ball to play straight and not enough shell for my tweener style to open up the lane. Maybe a differnt layout would be a better fit for me. I am impressed with the strenth of this ball and everyone I've drilled them for can't believe the boards they can cover. It wants to roll as soon as it starts smelling friction. Cliff Saliba -Saliba's Bowlers Shop

I actually drilled this ball weak and I think it may be entirely impossible for me to find a lane I can play right of 4th arrow with this ball without killing my hand. Seriously though, this ball is a great option for stroker and tweeners looking for a good oil ball and/or a ball to get them some extra angle and/or a ball to help them play inside. Seriously, I was lofting the ball over the gutter on a FRESH condition at my home center. This ball is flat scary. It flares more than anything I have ever seen. Jason Hoff, Roto Grip Staffer and Precision Bowling Services

Well I finally got a chance to test this ball out and watch some customers throw this ball as well. I am rather impressed with this ball. It is clean through the heads and very strong on the backend. I have mine drilled with the pin 2 inches above the ring finger and the cg kicked out toward the PAP about 6:30 or 7:00 from the pin (out of the box the pin was 4.5). I left about 3/8 positive oz side weight and a little bit of finger weight. I got to play around with this ball on a pattern similar to the Shark PBA pattern. I was able to stand 30 and bounce the ball off 7. While others were having to use a 500 grit abralon and go up 10, I was able to move right keep the factory finish and take some fingers out of the ball and still get it to recover consistantly. I will give anyone reading this the same advice I give to my customers on this ball. This ball will produce a lot of backend hook. However, you need some head oil to keep it from buring out and must have some backend to get it to

Strong Midlane and Angular Backend, pin is located to the upper right side of my ring finger. extra drill hole applied as well. The "Classic" is back. Roto Grip is proud to announce the release of the SD-73 "Classic". The ball that created the most controversy ever in the industry is back by popular demand. The Low RG (2.50), High Differential (.075) weight block is illegal by today's USBC standards, but since it was approved prior to the rule change it is perfectly legal for all USBC and PBA Regional competition. The Sure Griptm solid reactive coverstock is a performance proven winner over the last several years and is still one of the highest friction coverstocks on the market today. Click here to download drilling instructions! SD-73 Classic honor score promotion Specifications Factory Finish 1000 Abralon Track Flare Potential 9+ Inches Lane Condition Medium - Heavy Oil Cover Stock Sure Griptm Solid Reactive Weight Block High density cyl

The Low RG (2.50), High Differential (.075) weight block is illegal by today's USBC standards, but since it was approved prior to the rule change it is perfectly legal for all USBC and PBA Regional competition. The "Classic" is back. Roto Grip announce the release of the SD-73 "Classic". The ball that created the most controversy ever in the industry is back by popular demand If you need ball to hook and control oil. Problem Solved. The cover was left in Out Of Box condition The Sure Grip solid reactive coverstock is a performance proven winner over the last several years and is still one of the highest friction cover stocks on the market today. I was amazed to see how easy this ball clears the front end, expected this ball to hook off my hand and that was not the case That being said, the "LEGAL" core design is impressive I got exactly what I wanted, midlane and angular but controlled . The SD-73 is versatile however as the lanes started to dry out the ba

Ball specs – 15 lbs 2 oz, 3.18 oz top weight, 3.5 inch pin. The SD-73 was drilled with a 2.5 inch pin to PAP length, 105 degree layout. This put the pin about two inches right of, and vertically even with the ring finger. The unmarked mass bias is located about one inch left of the thumb in the first oil ring of the ball track. The reason for selecting this layout is as follows. I was looking for a first ball out of the bag to be used on a heavy, fresh oil condition with fresh back ends. A ball and drill pattern that would rev up quickly, read early, and have a controlled, arcing back end reaction. The cover was left in OOB condition. The SD-73 provided the reaction I was looking for with an additional surprise. The hit this ball gives is tremendous. It also keeps the pins very low for great carry. Even with a weaker pin position, the SD-73 provided 4 to 4.5 inches of track flare. For weaker handed players, punch this shell strong for oil and mediums to take advanta

I needed this ball to hook and control the oil. 4" Pin with MB at 45 degrees. Problem solved. The sure grip coverstock has been very successful with Roto Grip. Strong control with great hitting power. It's always amazing to see how easy this ball clears the front end. I expected this ball to hook off my hand and that was not the case. That being said, the "legal" core design is impressive. I got exactly what I wanted, the ball really controls the mids and is pretty angular off the spot. Much more than I expected. I found it a little more versatile than expected, however as the lanes started to dry out the ball was much to strong due to the drilling pattern. Cover is easily adjustable to handle a variety of conditions. Also a little added bonus, RG is giving away some free stuff for honor scores. Check out the link for details. http://www.rotogrip.com/stories.aspx?fullstoryid=345 Does any other ball manufacture do that? Kelly O'Driscoll Roto Grip Staff

This may be the most hooking ball I have thrown. I have been struggling in one of my leagues getting a ball to hook, the shot is very slick, with a LOT of carrydown, so getting a ball to recover on the backends has been difficult. I drilled the SD-73 pin 5 1/2 from my PAP and 3 1/4 above the midline, so being lefthanded this put the pin above my middle finger, and I had NO trouble getting this ball to hook. I have other hooking Roto-Grip balls, but this out hooks them by far. Until I drilled this ball I was playing straight up between 5 and 7, and now I am playing between 15 and 17, so there is a good 10 board difference at the arrows with this ball. I really think I am going to enjoy this ball tremendously.