Unless you use 20 grit, the cover on the Thunder Road solid will not hold up to todays heavy oiled lanes. However, I use a Charge in the house that I drill out of (which has alot of hook, and the Natural absolutely shines), and it rolls good. The Charge has a pearl version of the cover that is on the Thunder Road. If you are bowling on low volume, high friction surfaces, you should be ok.
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Tommy Gollick
Storm Regional/Pro Shop staff
Red Crown Pro Shop Harrisburg, PA
stormbowling.com