This DU-BRO Large Scale Treaded Lightweight wheel features a foam interior yet have a tough and rugged exterior skin for durability. Excellent for paved runways! The hub has a 3/16" (5 mm) axle diameter opening and can be drilled out to 1/4" (6.35 mm).
The #700TL and #800TL have a 1/4" (6.35 mm) axle dia. and can be drilled out to 3/8" (9.54 mm).