The Shimano CUES BR-U8000 is a lightweight 2-piston hydraulic disc brake caliper built for confident, controlled stopping on trail, gravel, commuter and e-bike builds. Excellent modulation gives you fine control across the full lever stroke, while Shimano mineral oil and One Way Bleeding keep maintenance simple.

Highlights

  • Smooth, predictable modulation for precise braking control in all conditions
  • Lightweight 2-piston design at an average of 107g
  • Post mount fitting with a wide rotor range from 140mm up to 220mm
  • Banjo connection with internal hose routing for a clean setup
  • One Way Bleeding makes servicing quicker and tidier
  • Runs the latest G05A-RX resin pads for quiet, well-modulated braking

Reliable, lightweight stopping power

A 2-piston aluminium caliper body with heat-resistant ceramic pistons delivers consistent braking while keeping weight low. It is well suited to cross-country, gravel, urban and e-bike use where you want strong, repeatable performance without unnecessary bulk.

Easy to set up and service

The banjo-type hose connection supports internal routing for a clean cockpit, and Shimano's One Way Bleeding system simplifies bleeding using Shimano mineral oil. The caliper ships ready to fit with mounting bolts, banjo bolt, pad retaining bolt and snap ring.

Latest-generation resin pads

This caliper is supplied with Shimano's G05A-RX resin pads (narrow type G, without cooling fin) for 2-piston calipers. The 5th-generation resin material runs quietly with strong modulation and offers around 50% better wear resistance than G03A and 110% better than G02A.

Compatibility & fit

Post mount caliper for hydraulic disc brake systems using Shimano mineral oil. Compatible rotor sizes are 140mm, 160mm, 180mm, 203mm and 220mm. Connects via a banjo joint and accepts G05A-RX resin pads as standard, with G04S metal and other compatible 2-piston narrow pads available as alternatives. Fits front or rear. In Australian setups the left lever typically operates the rear brake and the right lever the front, though caliper fitment is the same at either wheel.

Covered by Shimano's standard manufacturer warranty against defects in materials and workmanship. For any warranty claim or support, please return the item to Tune Cycles and our team will assess it and manage the process on your behalf.

  • 2-piston hydraulic disc brake caliper
  • Post mount fitting
  • Average weight 107g
  • Compatible rotor sizes: 140mm, 160mm, 180mm, 203mm, 220mm
  • Supplied with G05A-RX resin pads (narrow type, without fin)
  • Banjo hose connection with internal routing support
  • Uses Shimano mineral oil with One Way Bleeding
  • Aluminium body with heat-resistant ceramic pistons
SeriesShimano CUES
Part codeBR-U8000
TypeHydraulic disc brake caliper
Pistons2
MountPost mount
Average weight107g
Compatible rotor sizes140mm, 160mm, 180mm, 203mm, 220mm
Standard brake padG05A-RX resin (narrow type, without fin)
Hose connectionBanjo joint
Hydraulic fluidShimano mineral oil
BleedingOne Way Bleeding
Body materialAluminium
Piston materialCeramic
SKU SHM-IBRU8000MPRX
Barcode # 4550170232306
Brand Shimano