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Thread: Which suspension option for 420R

  1. #1
    Join Date
    Apr 2020

    Default Which suspension option for 420R

    Which suspension option would you recommend (sport/track/race) for a 420R that will be driven on street and track? I live in bay area CA with lots of great canyon roads in various states of bumpiness. Tracks are Laguna and Sonoma. I'm not concerned about comfort per se, but if race suspension is so stiff that it makes it skittish on twisty roads that aren't perfectly smooth, then I would consider that too stiff. Anyone with experience with these different options?


  2. #2
    Join Date
    Feb 2009


    The four options are:

    Road - used on the 420S as standard
    Sport - used on the 420R as standard
    Track - Where are track bias is primary
    Race - For race cars

    There is little difference between Sport and Track. The average driver will not know any difference. The Race set up is noticeably firmer. Its too firm for the road.

    My 420R I keep at Donington lives on track and I am happy running it with the standard Sport suspension and 13 inch wheels. Never felt any need to upgrade. Handles great on track. Given you are a mix of road and track then I think you will be fine with the sport suspension set up.
    2010 Caterham CSR with Cosworth 2.3 Duratec
    2018 Caterham 420R with 2L Duratec 210hp at Donington UK
    1975 BMW CSL Group 4 (restoration - engine and dry sump install time)
    1977 Holden Torana "A9X" (awaiting restoration)
    1985 Holden Commodore SS Group A
    1985 Holden Commodore Group A
    1982 Ferrari 400i
    1965 Ford Mustang Fastback "Holman Moody"
    1992 Ford Escort RS Cosworth WRC (fettling after long period of storage)
    1990 Range Rover 2 door Classic
    and another project car coming....

  3. #3
    Join Date
    Apr 2020


    Ok, thanks for the input. I can always swap dampers down the road once I see how things are.

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