Spring.

Spring at RC Shopper: 60 items in stock in the UK. Prices run from £6.99 to £37.99. Stock comes from Reve D, TOPLINE, Yokomo and 1 other brand. There are parts here for YD-2, but check the listing for the revision you run. We hold this stock ourselves rather than drop-shipping it, so orders placed before 2pm on a working day leave the same day. Softer springs give more grip and more body roll; stiffer springs give sharper response. Change the front and rear separately so you can feel which did what.