TLR have released front and rear sets of Low frequency springs for the TLR22 buggy. The Low Frequency Spring Sets allow for a more plush suspension feel with increased grip and more stability. The five rear springs are only separated by .05 lbs/in increments while the four front springs are only separated by .12 lbs/in increments allowing for very fine tuning to get your 22 vehicle dialed in. The lower frequency springs also land better allowing for a mellow rebound as the car settles quicker and more consistently.
Source: TLR [tlracing.com]