From Team Associated:
We’ve added four softer springs, ranging from 11.25T-12T, to the big bore lineup for more tuning options.
For the RC8B3.1, B3.2 RC8T3.1, and T3.2 series nitro and electric vehicles.
To work on the RC8B3 and RC8B3e Big Bore 1:8 shocks, these springs require the #81221 Spring Collars and #81194 Spring Cups. (These spring collars and cups are included with the RC8B3.1 and B3.1e kits.)
#81233 – Rear Springs V2, pink, 3.7 lb/in, L86, 12.00T, 1.6D – $9.99
#81234 – Rear Springs V2, brown, 3.8 lb/in, L86, 11.75T, 1.6D – $9.99
#81235 – Rear Springs V2, black, 3.9 lb/in, L86, 11.50T, 1.6D – $9.99
#81236 – Rear Springs V2, green, 4.0 lb/in, L86, 11.25T, 1.6D – $9.99