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Progressively Wound Shock Spring - Gray - P20 - Spring Rate 454 lb/in
Race Tech's answer to the linkless PDS system, Easy fix for the problem of rear suspension being too harsh and too easy to bottom, Progressive spring gives more resistance to bottoming and supplies a plusher ride, Made from chrome silicon spring steel, shot-peened, heat-treated and preset to prevent sacking, The rates get stiffer as the numbers go higher.
| 2012-2015 | KTM | 350 EXC-F | - | - |
| 2012-2015 | KTM | 350 XCF-W | - | - |
| 2012-2013 | KTM | 500 EXC | - | - |
| 2010-2011 | Husaberg | FE570 | - | - |
| 2010-2011 | KTM | 150 XC | - | - |
| 2009-2013 | KTM | 150 SX | - | - |
| 2008-2011 | KTM | 450 EXC-R | - | - |
| 2008-2011 | KTM | 530 EXC-R | - | - |
| 2008-2011 | KTM | 530 XC-W | - | - |
| 2008-2009 | KTM | 505 XC-F | - | - |
| 2008 | KTM | 505 SX-F | - | - |
| 2007-2015 | KTM | 250 XCF-W | - | - |
| 2007-2015 | KTM | 250 XC-W | - | - |
| 2007-2014 | KTM | 450 XC-W | - | - |
| 2007-2009 | KTM | 250 XC-F | - | - |
| 2007-2008 | KTM | 950 Super Enduro R | - | - |
| 2007-2008 | KTM | 144 SX | - | - |
| 2007-2008 | KTM | 990 Adventure | - | - |
| 2007, 2009-2010 | KTM | 400 XC-W | - | - |
| 2007 | KTM | 525 XC-W | - | - |
| 2006-2015 | KTM | 300 XC-W | - | - |
| 2006-2015 | KTM | 200 XC-W | - | - |
| 2006-2014 | KTM | 300 XC | - | - |
| 2006-2011 | KTM | 250 XC | - | - |
| 2006-2009 | KTM | 450 XC-F | - | - |
| 2006-2009 | KTM | 200 XC | - | - |
| 2006-2008 | KTM | 560 SMR | - | - |
| 2006-2007 | KTM | 525 EXC-G | - | - |
| 2006-2007 | KTM | 525 XC-G | - | - |
| 2005-2010 | KTM | 250 SX-F | - | - |
| 2005-2008 | KTM | 450 SMR | - | - |
| 2005-2006 | KTM | 525 SMR | - | - |
| 2003-2012 | KTM | 450 SX-F | - | - |
| 2003-2006 | KTM | 525 EXC Six Days | - | - |
| 2003-2006 | KTM | 525 EXC | - | - |
| 2003-2006 | KTM | 525 SX | - | - |
| 2003-2005 | KTM | 450 MXC | - | - |
| 2003-2005 | KTM | 450 EXC | - | - |
| 2003-2005 | KTM | 525 MXC | - | - |
| 2003-2004 | KTM | 200 SX | - | - |
| 2002 | Husaberg | FC470 | - | - |
| 2001-2002 | KTM | 400 MXC | - | - |
| 2001 | Husaberg | FX470E | - | - |
| 2000-2002 | KTM | 400 EXC | - | - |
| 2000-2002 | KTM | 400 SX | - | - |
| 2000-2002 | KTM | 520 MXC | - | - |
| 2000-2002 | KTM | 520 SX | - | - |
| 2000-2002 | KTM | 520 EXC Racing 4-Stroke | - | - |
| 2000 | Husaberg | FE600 | - | - |
| 1999-2010 | KTM | 125 SX | - | - |
| 1999-2000 | Husaberg | FC600 | - | - |
| 1999-2000 | Husaberg | FE400 | - | - |
| 1999-2000 | Husaberg | FE501 | - | - |
| 1999-2000 | Husaberg | FX600E | - | - |
| 1999 | Husaberg | FC400 | - | - |
| 1999 | Husaberg | FE501E | - | - |
| 1999 | Husaberg | FE600E | - | - |
| 1998-2011 | KTM | 250 SX | - | - |
| 1998-2005 | KTM | 200 EXC | - | - |
| 1998-2005 | KTM | 250 EXC | - | - |
| 1998-2005 | KTM | 300 EXC | - | - |
| 1998-2005 | KTM | 300 MXC | - | - |
| 1998-2003 | KTM | 200 MXC | - | - |
| 1998-2002 | KTM | 125 EXC | - | - |
| 1998-2002 | KTM | 250 MXC | - | - |
| 1998-2001 | KTM | 380 EXC | - | - |
| 1998-2001 | KTM | 380 SX | - | - |
| 1998-1999 | Husaberg | FE400E | - | - |
| 1994-2000 | Husaberg | FC501 |