Bike touring bike wheel size 28 inch series vermont eaton frame material aluminium frame alloy 7005 aluminium bike frame sizes cm 60 64 70 cm frame sizes xl xxl braking system disc brake brakes tektro auriga comp bicycle fork suspension fork fork suntour nex 4110 rear derailleur shimano deore xt number of gears 24 gear system with derailleur front derailleur shimano tourney crankset suntour xcc brake type hydraulic disc brake cassette shi