The Losi 1/24 Micro-B 2WD Buggy and 1/28 Micro-T Stadium Truck have reignited indoor carpet racing and backyard track competition worldwide. While the stock injection-molded composite chassis delivers impressive box-stock value, competitive drivers and brushless conversion builders quickly encounter the physical limits of soft nylon suspension links, caster blocks, and steering bellcranks.
In this comprehensive Rakonheli R&D engineering guide, we break down the exact suspension geometry, metallurgy, and priority upgrade stages to transform your Losi Micro-B or Micro-T into a zero-slop, track-dominating machine.
Stage 1: Front-End Steering Precision (Caster Blocks, Knuckles & Bellcrank)
On high-grip RCP and Ozite carpet tracks, corner entry consistency is dictated by front kingpin inclination and caster angle stability. Under hard braking and mid-corner lateral load, the stock plastic caster blocks and front steering knuckles deflect by up to 1.5°–2.2°, causing wandering straight-line tracking and unpredictable mid-corner oversteer.
- RKH CNC Aluminum Caster Blocks & Steering Knuckles: Precision milled from solid aircraft-grade billet aluminum, holding kingpin and bearing seat tolerances within
±0.01mm. Bearing crush and axial play are completely eliminated. - CNC Steering Bellcrank & Drag Link: Replaces the flexible plastic saver linkage with rigid ball-raced pivot posts, translating every microsecond of servo movement directly to the front contact patches.
Stage 2: Suspension Arms & Shock Towers (Maintaining Roll Center & Camber)
When landing triple jumps or running high-KV brushless power systems, stock composite lower A-arms bow and hinge pins ovalize their mounting holes. Rakonheli's Precision Pro Set pairs CNC aluminum front and rear lower suspension arms with multi-position shock towers.
| Component | Stock Composite Part | Rakonheli CNC Billet Upgrade | On-Track Performance Gain |
|---|---|---|---|
| Front Caster Blocks & Spindles | Molded Nylon (High Flex) | CNC 7075-T6 / 6061-T6 Anodized Aluminum | Eliminates camber/caster deflection in high-G sweepers |
| Front & Rear Lower Suspension Arms | Flexible Composite | Pocketed CNC Billet Aluminum with Delrin/Brass Inserts | Consistent hinge-pin alignment & lower center of gravity |
| Front & Rear Shock Towers | Stamped / Molded Plastic | Multi-Hole CNC Aluminum / 3K Carbon Tower | Zero damper tower flex; precise progressive shock angles |
| Rear Gearbox / Bulkhead & Motor Mount | Plastic Housing | CNC Aluminum Heat-Sinking Housing | Perfect pinion-to-spur mesh & 15°C cooler motor temps |
Stage 3: Rear Drivetrain, Gearbox & Heat Dissipation
Upgrading a Losi Micro-B or Micro-T to a 2S brushless system doubles the thermal and mechanical stress on the rear transmission. The Rakonheli CNC aluminum motor plate and rear bulkhead act as a structural heat sink while locking gear mesh so high-torque launches never strip spur teeth.
