Chassis numbers.
Identify a Radical by its chassis number
Clubsport and Prosport: a separate sequence
These predecessors are not SR3 versions. Clubsport production started in 1997 and Prosport production in 1999. From 1999 to 2006 they shared an interleaved sequence, so a number alone cannot reliably distinguish the models. The registry identifies chassis 185 as the last Clubsport, 219 as the last regular-production Prosport, and 220 as a replacement chassis built in 2009. The first Prosport number is not precisely documented.
SR3 generation landmarks
| Model | Approximate chassis range | Important exceptions |
|---|---|---|
| SR3 Tracksport / Supersport / LM · Gen 1 | SR300001–SR300399 | Chassis 403 was also built with Gen 1 Supersport bodywork. |
| SR3 RS · Gen 2 | Beginning with SR300400; last RS identified: SR300933 | Chassis 930 and 931 were RSX prototypes; 403 had Gen 1 bodywork. |
| SR3 RSX · Gen 3 | From around SR300934 to the XX transition | 930 and 931 were early prototypes; verify individual equipment. |
| SR3 XX · Gen 4 | First XX: SR301277 | XX and XXR overlap around the 2023 transition. |
| SR3 XXR · Gen 5 | First XXR: SR301540; then 1543 onward | Chassis 1541 and 1542 were XX models. |
Approximate SR3 model year by number
Ranges below are derived from the registry’s first model-year numbers, revision F (August 2024). They are not definitive delivery records. The final range is intentionally open because this reference ends at the start of 2024.
| Model year | First chassis | Through approximately |
|---|---|---|
| 2002 | SR300001 | SR300042 |
| 2003 | SR300043 | SR300130 |
| 2004 | SR300131 | SR300200 |
| 2005 | SR300201 | SR300253 |
| 2006 | SR300254 | SR300308 |
| 2007 | SR300309 | SR300353 |
| 2008 | SR300354 | SR300399 |
| 2009 | SR300400 | SR300482 |
| 2010 | SR300483 | SR300584 |
| 2011 | SR300585 | SR300693 |
| 2012 | SR300694 | SR300781 |
| 2013 | SR300782 | SR300874 |
| 2014 | SR300875 | SR300933 |
| 2015 | SR300934 | SR301002 |
| 2016 | SR301003 | SR301068 |
| 2017 | SR301069 | SR301139 |
| 2018 | SR301140 | SR301199 |
| 2019 | SR301200 | SR301244 |
| 2020 | SR301245 | SR301306 |
| 2021 | SR301307 | SR301393 |
| 2022 | SR301394 | SR301514 |
| 2023 | SR301515 | SR301616 |
| 2024 | SR301617 | — |
For example, SR300220 falls in the indicative 2005 range. Some 2003-built cars delivered in 2004, chassis 583 and chassis 682–689 illustrate that delivery may change the model year. Chassis 13 is normally skipped.
Sources: Radical Sportscar Registry — model years by chassis number · SR3 buyer’s guide · Search the registry