Bicycle pedals for MTB / TREKK / CITY bikes. WELLGO R191B. Combinated system: Clip-In + Flat platform Thread: 9/16 ”x 20T Core: Aluminum. Silver. Axle: CR-MO. Sealed bearing. NON-Slip platform with kraton coat. Compatible cleats Shimano SH51 or REF.15554/35527 Platform measure: 90 x 88 mm. Weight: 380 gr.