HB Racing rates its 1/8 buggy springs in gF (the number in the part name — higher is stiffer), and has kept one spring line across the whole D8/819 platform: 68 mm fronts and 83 mm rears for the D819, D819RS, E819, E819RS, D8 World Spec, and E8 World Spec, reaching back through the 817-series cars that share the Big Bore V2 shocks. This page lists every current spring softest to stiffest with HB’s rate, the part number, and a link to that exact spring at AMain. Kit springs are marked in each table.
D8 & 819 Series Buggies — Front, 68 mm
Both the D819RS and D8 WS ship with the Gold (79.6 gF) front; HB’s factory baseline setup for the D8 WS drops to Yellow (73.8 gF), while the D819RS baseline stays on Gold.
| Color | Rate (gF) | Part # | Notes |
|---|---|---|---|
| Green | 60.8 | #HB109806 | — |
| White | 64.6 | #HB109807 | — |
| Blue | 68.9 | #HB109808 | — |
| Yellow | 73.8 | #HB109809 | — |
| Gold | 79.6 | #HB109810 | Kit spring |
| Red | 86.1 | #HB109811 | — |
D8 & 819 Series Buggies — Rear, 83 mm
The Blue (61.6 gF) rear is both the kit spring and the factory baseline on the D819RS and D8 WS. The Dark Orange (82.1 gF) is the stiffest option in the line.
| Color | Rate (gF) | Part # | Notes |
|---|---|---|---|
| Green | 54.7 | #HB109812 | — |
| White | 57.9 | #HB109813 | — |
| Blue | 61.6 | #HB109814 | Kit spring |
| Yellow | 65.7 | #HB109815 | — |
| Gold | 70.3 | #HB109816 | — |
| Red | 75.8 | #HB109817 | — |
| Dark Orange | 82.1 | #HB113476 | — |
Earlier Hot Bodies-era cars (D812/D815) also used 60 mm and 76 mm Big Bore springs; those lengths don’t interchange with the 68/83 mm line above and aren’t covered here.
Running something else in 1/8? See the Kyosho chart, the Mugen MBX8 chart, the XRAY XB8 chart, the Tekno chart, or the Team Associated 1/8 chart.
Specifications from HB Racing’s official instruction manuals and part listings. Some links above are affiliate links that support the site.
