ACTIVE Hard Inserts Proline 1.9-4.75

These are sold in sets of 2 and PRINTED TO ORDER, you'll need two orders to complete a truck, you can mix and match easier this way. These fit the Krawler, Krawler TA, Hyrax, and swamper tires. If you need JConcepts inserts they are different. I use simple Overture 95a TPU, I highly recommend you set your truck on stands when not in use. If you do experience flat spots, they will go away once you drive a little just like a set of old bias ply super swampers do. Super Soft 4-6lbs Soft 4-6lbs, just a bit stiffer Medium 5-8lbs Hard 8-10lbs