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 & XB4 '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.
| Spring | Part # |
|---|---|
| 1 Dot | #368381 |
| 2 Dots | #368382 |
| 3 Dots | #368383 |
| 4 Dots | #368384 |
| 5 Dots | #368385 |
XB2 & XB4 '25–'26 — Rear, 57.5 mm (conical)
| Spring | Part # |
|---|---|
| 1 Dot | #368481 |
| 2 Dots | #368482 |
| 3 Dots | #368483 |
| 4 Dots | #368484 |
| 5 Dots | #368485 |
XB2 '24 — Front, 42 mm
| Spring | Rate (lb/in) | Part # |
|---|---|---|
| 1 Dot | — | #368191 |
| 2 Dots | 3.83 | #368192 |
| 3 Dots | 3.99 | #368193 |
| 4 Dots | 4.14 | #368194 |
| 5 Dots | — | #368195 |
XB2 '24 — Rear, 57 mm
| Spring | Rate (lb/in) | Part # |
|---|---|---|
| 2 Dots | 2.27 | #368292 |
| 3 Dots | 2.43 | #368293 |
| 4 Dots | 2.53 | #368294 |
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.
| Spring | C | Rate (lb/in) | Part # |
|---|---|---|---|
| 1 Dot | — | 3.28 | #368183 |
| 2 Dots | C=0.65 | 3.71 | #368184 |
| 3 Dots | C=0.72 | 4.11 | #368185 |
| 4 Dots | C=0.80 | 4.57 | #368186 |
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 |
XT2 & XT4 — Conical, 49 / 67 mm
The stadium trucks run longer conical springs than the buggies — 49 mm front, 67 mm rear. XRAY lists the 2-dot sets as the kit springs; other dot ratings exist but XRAY has not published them in the XT2 spare parts list. (The XB4 does not use these: from '25 on it shares the XB2's 42.5 / 57.5 mm conical springs above.)
| Position | Length | Dots | Part # |
|---|---|---|---|
| Front | 49 mm | 2 Dots | #368392 |
| Rear | 67 mm | 2 Dots | #368492 |
XB2, XB4 & XT2 (earlier) — Progressive & Stripe Options
Alongside the dot ladders above, XRAY's earlier spare parts lists carry a set of progressive and stripe-graded option springs. A progressive spring stiffens as it compresses, so it has no single lb/in figure — use it to soften initial travel without giving up hold-up on big hits. These appear in the XB2 '23, XB4 '22–'23 and XT2 '21–'23 lists.
| Position | Type | Grade | C | Part # |
|---|---|---|---|---|
| Front | Progressive, L=40 mm | 3 Dots | — | #368175 |
| Front | Progressive Open, L=41 mm | 2 Dots | — | #368177 |
| Front | Linear | 1 Stripe & 3 Dots | — | #368182 |
| Rear | Progressive | 2 Stripes | C=0.35–0.45 | #368273 |
| Rear | Progressive, L=55 mm | 2 Dots | — | #368275 |
| Rear | Progressive Open, L=55 mm | 2 Dots | — | #368277 |
| Rear | Linear | 1 Stripe & 3 Dots | — | #368283 |
#368177 and #368277 are not carried by AMain, and #368273 is discontinued there, so those three are listed for identification only.
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.
