Shimano Dura-Ace BR-R9270 Hydraulic Disc Brake Model:Rear it folds down small enough

it folds down small enough to fit in your pocket

This is a high quality alloy rim that is tougher than most with added protection at the bead-walls for impact resistance and reduced sidewall cuts

This means that they'll roll smooth and stay tough

RD Weight 277g

Shimano Dura-Ace BR-R9270 Hydraulic Disc Brake Model:Rear it folds down small enoughWith an all new design, DURA ACE BR R9270 hydraulic calipers are the most compact yet. MONO BODY construction ensures light weight and rigidity, proving that good things can come in small packages. With an all new MONO BODY construction design, high performance braking has reached a new peak. The BR R9270 caliper drops weight while also providing increased pad clearance, ensuring a quieter ride. Lastly, a new bleeding process makes maintenance easier