Complete list of XRAY XB2 and XB4 shock springs across all recent generations - conical and linear, front and rear - with dot ratings, published rates, and part numbers.
XRAY rates its 1/10 off-road springs by paint dots — more dots means stiffer — and the spring family changed with each buggy generation, so match the section below to your car. Linked springs go to that exact part at AMain. Rates in lb/in are shown where XRAY has published them.
XB2 '25–'26 — Front, 42.5 mm (conical)
The current XB2 carpet and dirt editions run big-bore conical springs: 42.5 mm front, 57.5 mm rear. Carpet kits ship with softer dots than dirt kits.
XB2 '25–'26 — Rear, 57.5 mm (conical)
XB2 '24 — Front, 42 mm
XB2 '24 — Rear, 57 mm
XB2 & XB4 (earlier) — Front, C-Rated
Older XB2 generations and the XB4 through '24 use the classic linear springs marked with a spring constant (C) and dots.
XB2 & XB4 (earlier) — Rear, C-Rated
| Spring | C | Rate (lb/in) | Part # |
|---|
| 1 Dot | C=0.35 | 2.00 | #368284 |
| 2 Dots | C=0.40 | 2.28 | #368285 |
| 3 Dots | C=0.45 | 2.57 | #368286 |
| 4 Dots | C=0.50 | 2.86 | #368287 |
XB4 '25+ — Conical, 49 / 67 mm
The current XB4 uses its own longer conical springs (49 mm front / 67 mm rear, dot-rated 1–5). Purchase links are available for the 2-dot sets:
| Position | Length | Dots | Part # |
|---|
| Front | 49 mm | 2 Dots | #368392 |
| Rear | 67 mm | 2 Dots | #368492 |
Other 1/10 Off-Road Spring Charts
Running something else? See the TLR 22X & 22-series chart, the Team Associated 1/10 chart, or the HB Racing 1/10 chart.
Part numbers from XRAY's official spare parts lists; published rates cross-checked against PetitRC's big-bore spring database. Some links above are affiliate links that support the site.
