SRAM's hydraulic brake family ran DOT 5.1 for years, then split: the budget-tier DB8 moved to mineral oil in 2022, and the high-end Maven followed in 2024 with SRAM's co-developed Maxima Mineral Brake Oil. The rest of the family — Code, Level, Guide, G2, and the Force / Red AXS road brakes — still takes DOT 5.1. The complication arrives at the caliper end too: SRAM's Bleeding Edge port spec moved to a thicker bleed block when Maven launched, and the Maven Bronze refresh in 2025–26 locked the new 5.0 mm block as the production-volume pattern. Older Code calipers still take the 4.0 mm block. Two blocks ship in the Ultimate SRAM Bleed Kit, one for each spec, so a workshop running a mixed Code-and-Maven fleet doesn't have to track which kit fits which year of caliper. The fluid call is on the mechanic — Maven and DB8 take mineral oil, everything else SRAM takes DOT 5.1. What's in the kit The kit uses two 20 ml Becton & Dickinson syringes, paired with two M5 assemblies for the lever side and one Edge assembly for the Bleeding Edge caliper port. The Edge assembly seats against the modern 5.0 mm block on Maven and the older 4.0 mm block on Code with the same fitting geometry; the block change is what selects the right thickness for each caliper. The kit also includes nitrile gloves (size L), a velcro strap, and the Torx T10 wrench needed for the lever-side bleed-port hardware. Compatibility One SRAM brake bleed kit fits every SRAM hydraulic brake in current production. The 5.0 mm block covers the full Maven family: Maven Ultimate Expert, Maven Ultimate, Maven Silver, and Maven Bronze. The 4.0 mm block covers SRAM Code (pre-Maven generations) and the broader 2-and-4-piston SRAM family from the pre-Maven era. The same block set covers the Avid Elixir, Juicy, and older-generation Avid brakes, and the kit fits older Formula hydraulics (Oro, C1, R1, R0, K24, K18) that share the SRAM-pattern fittings. The kit does not fit Formula Cura, which uses a Cura-specific port outside this kit's coverage. Specs Caliper syringes: 2 × 20 ml Becton & Dickinson Lever assemblies: 2 × M5 Caliper assembly: 1 × Edge (Bleeding Edge port) Bleed blocks: 4.0 mm (older Code / Avid) + 5.0 mm (Maven family) Wrench included: Torx T10 Fluid: not included. SRAM-spec DOT 5.1 for Code, Level, Guide, G2, Force / Red AXS, and Avid Elixir / Juicy; SRAM-spec Maxima Mineral Brake Oil for Maven and DB8. Made by Bleedkit.com (Ljubljana, Slovenia) All 9 pieces are itemized in the In the box list below. Built in Ljubljana, since 2011 Bleedkit.com has been building bleed kits per brake-system family 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 Ultimate kit's pair-block strategy is what keeps a shop on one SKU through a generational change at SRAM; instead of stocking two kits, the mechanic swaps the block at the caliper end. Pro tip from our mechanics On a DOT 5.1 bleed (Code, Level, Guide, G2, Force / Red AXS, Avid Elixir / Juicy), the fluid attacks paint and is hygroscopic out of the bottle. The bench surface needs a clean rag underneath before the syringe goes on, and the bottle of DOT needs to go back into a sealed container the second the bleed is complete. A DOT bleed left open to shop air for ten minutes has already absorbed enough moisture to lower the boiling point of the fluid; on a hot descent that translates to brake fade you can feel. On a Maven or DB8 bleed (Maxima Mineral Brake Oil), the contamination boundary is the opposite direction — a syringe that has touched DOT will attack the mineral-oil seal stack on contact, so a Maven kit and a DOT kit live in separate drawers or get a fresh set of syringes between fluids. Whether your specific SRAM caliper takes the 4.0 mm or 5.0 mm block, and how the Maven Bronze refresh changed the calculation, is covered in our compatibility walk-through: Which bleed kit fits Shimano R9300, Ultegra R8270, and SRAM Maven Bronze →
