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Wire bead with a more robust 60 TPI casing, the practice-grade OS20 PowerBlock has all the same tread and rubber features as the S-Spec version.
Features:
Size | TPI | Weight |
24 x 1.40 | 60 | 340 grams / 12 oz |
24 x 1.60 | 60 | 357 grams / 12.6 oz |
24 x 1.75 | 60 | 442 grams / 15.6 oz |
24 x 2.10 | 60 | 587 grams / 20.7 oz |