Oversized 45mm Core, 5mm tire with 7mm lip, 68 grams per wheel (Over 20% weight reduction compared to Boom Solid Core 59x38mm). Made in USA. Savant is perfect for: Outdoor tracks, Slick Sport Courts, Bank Tracks and Dirty Wood Floors. Then we wrapped that puppy in our famous Poison urethane. Poison provides awesome grip without that 'sluggish marshmallow' feeling which allows for more roll. First, we start with Savant, featuring an oversized core with a molded lip. The oversized core not only reduces weight but increases the overall roll (speed). 1 pack - 4 wheels / 59mm x 38mm - Pink.