Brunswick Siege Review - The bowling ball layout we used was 60 x 5 x 70 without a balance hole, this is a slow response drilling for high track bowlers on a typical house shot. The surface we used was 1000 abralon. The lane surface was Brunswick pro-anvilane synthetic and wood with guardian. The lane conditions were typical house patterns, I must note both centers play close to the same. Bowler style is a tweener or track area bowler with 250 rev rate and 16 mph ball speed. Test Results - Bowling Ball Reviews - Brunswick Siege