Fits MTB 27.5" (650B) & 29" TiresDeFender(TM) M1 is compatible with all standard front forks including reverse arch designs, the unique quick release attachment system integrates the DeFender(TM) M1 seamlessly with the front of your bike.AttachmentsQR Fork Attachment Fits 19.6 - 26 mm & 27.7 - 35 mm Ssteerer TubeMaterialTwo Tone Injected High Impact Resisant PlasticAdded FeaturesHighly Polished UndersideSize (L x W x H)64 x 8.5 x 15 cm25.2" x 3.3" x 5.9"Weight208 g / 7.32 ozArt.no.TC9639