When motor assistance and leg power meet, the range of terrain a bike can conquer grows almost exponentially. The H 1900 SPLINE is designed for this, now upgraded with the famous DT Swiss Ratchet technology. The Ratchet LN system distributes the combined forces from the rider and the motor over a larger area than the previous pawl freehub systems, increasing the systems' durability thanks to lower load peaks. The 370 hub enables full power transmission to the ground with reinforced hybrid spokes laced to a resistant aluminum rim.Features:Freehub Body:- The cassette interface of the freehub body is optimized with a specific hardened steel for the higher loads that occur on eMBs.Ratchet LN: - First wheel equipped with the Ratchet LN system, for force distribution over a larger area, increasing durability.Spokes:- DT Hybrid 1 spokes are reinforced and increase the lateral and torsional stiffness of the wheel.System weight:- The system weight is composed of the weight of the rider and his equipment, plus the bike with luggage.Sleeve joint:- Sleeve joint refers to a method used in making rims. In this case, the two rim ends are pressed together via a molded aluminum part. This gives these rims a high degree of stability.Hooked / Crotchet tubeless TC:- Hooked or crotchet refers to the shape of the rim flange. In this variant, the rim flange has a so-called hook. This supports the fixation of the tire bead and ensures safe function, also in high pressure use cases (>5 bar tire pressure). Tubeless refers to the ability of the rim to be used without a tube, but a tube set up is also possible.Rim height:- In cycling, rim height significantly impacts the aerodynamics, agility and weight of the wheel. The general principle is the higher the profile of the rim, the greater the aerodynamic advantage, the lower the profile of the rim, the greater the response and better the handling when cornering and changing speed. Rim Inner Width:- DT Swiss offers MTB rims with inner rim widths of 20 - 76 mm. The right combination of tire width and rim width leads to ideal tire support. Better tire support reduces the risk of ´´burping´´ and therefore allows the tire pressure to be reduced. On the other hand, wider rims and wider tires also increase the weight of the wheels.Thru-axle:- Thru-axle refers to a wheel mounting system. RWS technology from DT Swiss allows quick, precise mounting simply by turning an easily adjustable lever. Thru-axle systems guarantee a rigid and secure connection between the wheel and the frame. Thru-axles must be compatible with the frame and fork because the built-in-width, diameter and thread of the axle vary and are defined by the frame and fork manufacturer.Boost:- Boost refers to wider axle dimensions. Frame and fork manufacturers use this to build a stiffer bike overall. A flatter spoke angle on the wheel can be created by increasing the flange distance, which improves the symmetry and increases the stiffness, especially on large wheels.IS 6-Bolt:- IS is short for International Standard and describes a mounting system for brake discs. 6-bolt refers to the fact that the brake disc is in this case mounted on the hub using 6 bolts.Brake Interface:- The advantage of the Center Lock system is that the disc brake attachment is made with one single lock ring, which facilitates assembly. On the other hand, an advantage of the IS-System (6 Bolt) is that in the event of a necessary repair on the trail, no special tool is needed for disassembly. Shimano Steel (SS):- Steel freehub body for Shimano MTB cassettes up to 10-speed.Pro Lock:- Pro Lock is a thread lock function which prevents the spoke-nipple connection from loosening, allowing for extremely durable wheel builds. Straightpull:- Straightpull refers to spokes without the classic J-bend head. The lack of a bend in the head eliminates one of the spoke's weak points, making it very robust and stable. Specifications:- Net weight: 1140 g- Recommended System weight max.: 150 kg- ASTM classification: 4- Approved for e-bikes: Yes (max. 32Km/h or max. 250W)- Material: Aluminum- Rim joint: Sleeve joint- Tire interface: Hooked / Crotchet tubeless TC- Valve hole: Presta- Rim Diameter: 27.5´´ / 650B- Rim Height: 20 mm- Inner Width: 30 mm- Outer width: 35 mm- Hub type: 370- Axle system: 12 mm Thru Axle- Built-in dimension: 148 mm Boost- Brake Interface: Disc IS 6-Bolt- Cassette interface: Shimano MTB- Freehub body: Shimano Steel (SS)- Freehub system: Ratchet LN 18- Spokes left: DT hybrid 1 Straightpull- Spokes right: DT hybrid 1 Straightpull- Spoke pattern: Three-cross (1:1)- Nipples: DT Pro Lock Squorx ProHead alu Inclusive:- Tubeless tape 32 mm- Tubeless valve MTB 32 mmTechnology:DT Pro Lock® Technology:- DT Pro Lock is a process where a dual compound, adhesive liquid is injected into the nipple thread, allowing for extremely durable wheel builds. By threading the nipple onto the spoke the adhesive is activated and starts to harden. Re-truing the wheel is still possible after the adhesive has hardened completely, with only a minimal decrease of its thread-lock function.Tubeless technology:- All DT Swiss wheelsets are tubeless compatible and the ASM versions come tubeless ready, equipped with tubeless tape and valves.