Zipp Ceramic Sealed Cartridge Bearing 61803 + 61903 MFPN=RRB36BLK OEKO-TEX® 100 certification means that

OEKO-TEX® 100 certification means that the main fabric poses no harm to human health

Color Black Defined Color Black ISO Diameter 559 / 26" MTN ISO Width (mm) 56 Labeled Size 26 x 2

Ergonomic design with thumb grip for maximum control

Sneak it into a cross bike fit it into a road frame the overall diameter stays the same as a 700 x 30mm road tire

Zipp Ceramic Sealed Cartridge Bearing 61803 + 61903 MFPN=RRB36BLK OEKO-TEX® 100 certification means thatZipp CeramicSpeed Bearing Kit 61803 x1 61903 x1 For Sub 9 Super 9 Hub Shell. Zipp Cartridge Bearings TECH SPECS Bearing O. D. (mm) 26 Bearing I. D. (mm) 17 Manufacturer Number 61803 Material Ceramic Thickness 5