Also if you can get specifics grip spec wise and what not, go post on forum.bowlingchat.net and let some of the industry experts help you out. 

 

Edited by themagician on 5/22/2011 at 2:17 PM

Really? Just out of curiosity how are you measuring tilt?

So, let me try a follow-up question.  If two balls are both comfortable and the release is (as far as the bowler can feel) identical, then we have one ball with zero tilt and one ball with 10° tilt.  Assuming that this is due to a difference in pitch, I would assume the next step is to identify the pitch problem.  Here's the tricky part: I would also assume that the pitch of the ball with 10° tilt is the correct choice, and that the ball with 0° tilt should have its pitch changed to match the ball with 10° tilt, not the other way around.

I hope that makes sense, let me try stating it another way.  All other factors being equal, if my RotoGrip Theory consistently shows zero tilt and my X Factor Vertigo consistently shows 10° tilt, and if I discover a difference in the pitches, it would be better to change the Theory to match the Vertigo rather than the other way around, correct?

 

Interesting discussion, I appreciate the comments.

Hi Charlest. Nope, definitely not full roller. It's the only one out of 5 I measured that came out zero, so I "thought" I had double checked everything.... I have wiped off the trace since then and want to re-measure accurately, so I'll put this on hold until practice on Sunday and see what happens.

 

If 0 can only occur for a full roller, then I've measured wrong on that ball.

 

Thanks for the shout, we'll be back after Sunday morning.

Steve,

 

USBC ball specs say the ball circumference varies from 26.7" to 27.0".  Given that the first oil track diameter corresponds to the bowler's axis tilt, a 0 degree tilt should equal a track diameter of 13.4" - 13.5". If that is the case, that is the track diameter of a full roller.

 

Yes, there can be a track diameter of 13.5" and the track can still be outside of the thumb and the fingers, but if the track diameter is 13.5", that ball is still traversing the full circumference of the ball, making it a full roller.

 

Are your measurements off a little somewhere?

I can't find Mo's old table where the track diameter in inches is mapped to the axis tilt in degrees. It used to be both on Mo's website and Buddies website, but right now, I am not finding it. (If someone has it or its location, I'd be grateful if you'd post it here. Thanks)

 

 

Thanks to both. I don't know about Mo's chart, but I do have the table from the end of the USBC Ball Motion Analysis form, which does the same thing.

 

Two things:

 

I threw the Theory along with two other balls, including a new GameBreaker today and came up with (drum roll please) 10 degrees on all 3, plus or - 1/4 inch diameter measured at 90 degree rotations of the pro sect... Perhaps I can't draw a straight line or can't read a scale....? I did notice that on each of the three the measurement was not equal measured in all spots, so perhaps I'm just not taking my time tracing that first ring? Either way, consistent results today. Sure which I could re-measure from last week, but time to move on I guess.Good discussion either way, and appreciate the feedback re: impact of grip on tilt.

here is the link guys http://wiki.bowlingchat.net/wiki/index.php?title=File:Axistiltchart.JPG

 

Any of the tech articles you are looking for more than likely will be in that wiki and if its not you can drop us a line on the bowlingchat forum and we'll locate it and get it added for you.