Bleedkit.com Premium Gold TRP/Tektro Bleed Kit

Tektro and TRP hydraulics share enough fitting geometry with Shimano that a single kit can cover both with the right adapter. The catch is the caliper-port thread: Tektro and TRP use an M6 fitting where flat-bar Shimano uses an M5, and forcing the wrong tube onto either system damages the port threads in a way that doesn't recover. The Premium Gold TRP/Tektro Bleed Kit carries a brass M5-to-M6 adapter that bridges the two systems and ships with the bleed block sized for flat-bar Tektro / TRP and Shimano 2 or 4-piston calipers. For a workshop where the rotation is heavy on entry-level builds and gravel bikes coming back for warranty service, this is the one-kit answer for the mineral-oil flat-bar service mix.

What's in the kit

The lever funnel is a 30 ml transparent syringe body with a brass M5 thread. The kit's distinctive piece is the brass M5-to-M6 adapter that screws onto the funnel and presents an M6 thread to the Tektro / TRP master cylinder. The caliper side uses a 20 ml syringe with a long-lasting tube, a stainless-steel tube insert for the bleed nipple, and a separate M6 brass tube fitting for the Tektro / TRP caliper port. The bleed block fits flat-bar 2 or 4-piston calipers across both Tektro / TRP and Shimano.

Compatibility

The kit fits every Tektro and TRP hydraulic flat-bar brake currently in production. It also fits all flat-bar Shimano hydraulic brakes (XTR, XT, Saint, Zee, SLX, Deore, Alivio, Acera, Alfine, Metrea) through the M5-to-M6 adapter pattern. It does not fit drop-bar Shimano levers, which need the brass dropbar adapter and the smaller dropbar block carried in the Premium Road or Workshop Master kits. The 2026 Shimano R9300 / R8270 drop-bar levers are outside this kit's coverage; they need the new M7 funnel thread.

Specs

• Funnel: 30 ml transparent, brass M5 thread
• Adapter: brass M5-to-M6 for Tektro / TRP
• Caliper syringe: 20 ml with long-lasting tube
• Caliper tube fitting: M6 brass
• Bleed block: covers flat-bar Tektro / TRP and Shimano 2 or 4-piston
• Wrenches included: 7 mm, Torx T15
• Made by Bleedkit.com (Ljubljana, Slovenia)

All 13 pieces are itemized in the In the box list below.

Built in Ljubljana, since 2011

Bleedkit.com has been building system-specific kits in Ljubljana, Slovenia since 2011, distributed in North America by Euro Toolworks alongside the Unior cycling-tool catalog. Unior has been forging hand tools in Zreče since 1919, and sponsors professional road and mountain-bike race teams. The TRP / Tektro kit's M5-to-M6 adapter is the small brass piece that makes a single kit cover two brake systems; the rest of the kit is shared geometry with the Shimano flat-bar bench.

Pro tip from our mechanics

Tektro and TRP calipers use a slightly different bleed-port seat geometry from Shimano: the M6 tube fitting wants a deliberate snug-then-stop feel rather than the firm twist that seats a Shimano M5 fitting cleanly. Overtorqued, the M6 fitting deforms the O-ring and the next bleed leaks at the caliper. In our shop the seat that holds is firm engagement at first resistance, then a deliberate stop rather than a final hard twist.

How TRP / Tektro compatibility maps against Shimano and SRAM, including the 2026 lever-thread changes, is in our compatibility walk-through: Which bleed kit fits Shimano R9300, Ultegra R8270, and SRAM Maven Bronze →