Hope Tech EVO GR4 4-Piston hydraulic disc brakes, front and rear, with 6-bolt floating rotors

A complete Hope Tech EVO GR4 brake set for gravity, enduro and e-bike riding: two fully bled Hope brakes - front with the right-hand lever, rear with the left-hand lever - plus a pair of Hope Floating Disc 6-bolt rotors (1.8 mm two-piece floating rotor, 410 stainless outer on a CNC alloy centre). Made in Barnoldswick, UK, and fitted by Tune Cycles.

Kit includes

Front: Tech EVO GR4 front brake, right-hand lever, 2 m black hose, cut to length at fitting, racing-compound pads, fully bled
Rear: Tech EVO GR4 rear brake, left-hand lever, 2 m black hose, cut to length at fitting, racing-compound pads, fully bled
2 x Hope Floating Disc 6-bolt rotor, 203 mm, black

Options

Brake colour: choose it on the front and rear rows - the first colour is the lever and caliper body, the second the accents; pick the same on both. Rotor sizes: Hope Floating Disc 6-bolt 180, 203, 220 mm (black centre; other colours on the rotor listings). The kit defaults to two 203 mm; set that row to 0 and pick another size, or mix sizes. Hope's current gravity brake - 200 mm and larger. Rotor thickness the caliper takes: 1.8 to 2.3 mm (Floating, Fixed) - not the Vented rotor.

Fit-up parts, sold separately (linked here and shown with this kit): Hope brake mounts, black or silver for a rotor bigger than your fork or frame's native size (Hope's letter chart is on each listing), spare pads (racing compound V4 / GR4 / TR4, sintered V4 / GR4 / TR4, e-bike compound V4 / GR4 / TR4), and the Hope Easy Bleed Kit. Fluid: DOT 5.1 (DOT 4 compatible).

This kit is the 6-bolt version; the Centre Lock version is listed separately.

Already have rotors? Untick them and the price follows the parts you keep. Every part in this kit can be deselected, so a bike that only needs one end, or already has the right rotors, is not charged for the rest.

Fitting notes

Australian convention: the right-hand lever works the front brake and the left-hand lever the rear; the brakes are built that way. Hope ships every brake with a long hose, fully bled - most bikes need the hose shortened and the brake bled again, which is a workshop job (or the Easy Bleed Kit and Hope's instructions). Post-mount forks and frames take a rotor of their native size directly; a bigger rotor needs the matching Hope mount, and an IS mount always needs one. 6-bolt rotors bolt straight to a 6-bolt hub (6 x M5, 5-6 N.m). Hope states the GR4 is not compatible with the 3.3 mm Vented rotor; this set uses Hope's 1.8 mm Floating rotors.

Tune Cycles supplies, fits and bleeds these brakes. Choose your options above; if you are unsure what your fork, frame or hubs take, ask us before you order.

Every part in this kit is covered by Hope Technology's warranty: disc brake systems for two years from the date of purchase against defects in materials and workmanship (proof of purchase required), rotors against defects in materials and workmanship. Brake pads and rotors are wear items; wear from normal use, incorrect installation, crash damage or modification is not covered. For any warranty claim or support, return the part to Tune Cycles and we will handle it with Hope's Australian distributor.

GR4: one-piece CNC caliper, four pistons (2 x 18 mm + 2 x 17 mm) - about 6% more power than the V4, stiffer, larger adjustment range, slimmer bore caps
EVO: longer hook, dimpled blade, shorter free stroke, roller-bearing pivot, twin guide bushes, bleed port, tool-free bite point and reach, Standard blade fitted - right lever front, left lever rear
Two fully bled brakes with 2 m black hose, cut to length at fitting; Hope racing-compound pads fitted
Two 203 mm Hope Floating Disc 6-bolt rotors included (1.8 mm two-piece floating rotor, 410 stainless outer on a CNC alloy centre)
Rotor options: 180, 203, 220 mm - mix front and rear sizes
Rotor thickness for the caliper: 1.8 to 2.3 mm (Floating, Fixed) - not the Vented rotor
Hydraulic system: DOT 5.1 (DOT 4 compatible)
Lever body black or silver with black / silver / blue / red / purple / orange accents
Sold separately, linked in the description: Hope brake mounts, spare pads, Easy Bleed Kit
Editable kit: deselect any part you already have; the price follows the parts you keep

Brand	Hope Technology
Series	Hope Tech EVO
Caliper	GR4: one-piece CNC caliper, four pistons (2 x 18 mm + 2 x 17 mm) - about 6% more power than the V4, stiffer, larger adjustment range, slimmer bore caps
Lever	EVO: longer hook, dimpled blade, shorter free stroke, roller-bearing pivot, twin guide bushes, bleed port, tool-free bite point and reach, Standard blade fitted
Build	Two fully bled brakes: front (right lever) and rear (left lever)
Hose	2 m black hose, cut to length at fitting
Pads fitted	Hope racing compound, pad shape V4 / GR4 / TR4 (HBSP303)
Fluid	DOT 5.1 (DOT 4 compatible)
Rotors included	2 x Hope Floating Disc 6-bolt 203 mm, black
Rotor options	Floating Disc 6-bolt: 180, 203, 220 mm
Rotor thickness (caliper)	1.8 to 2.3 mm (Floating, Fixed) - not the Vented rotor
Compatible pads	Hope V4 / GR4 / TR4 (HBSP303) - racing, sintered, e-bike
Mounts (sold separately)	Hope brake mounts, black or silver - letter per Hope's chart
Bleed kit (sold separately)	Hope Easy Bleed Kit Tech 4 / EVO
Colours	Black or silver body; black, silver, blue, red, purple, orange accents
Warranty	Hope: two years on the brake system; through Tune Cycles