Ribble r4 7005 mtb frame tapered headtube 1 18 1 12 disc only model 7005 heat treated butted aluminium tubing suitable for up to 100mm travel white painted finish sizes are from centre to top max tyre width 26 x 23 takes a semi integrated headset r4 headset 1 18 1 12 7005 r4 mtb frame geometry