Insert Spacer Set
 
Credit where credit is due, these spacers were designed by Pendle Slot Racing, but they have given me permission to use their design and create these sets of spacers.
 
Simply snip them off the sprue and glue into the wheel, then glue the insert on top of the spacer, simple. Sold as 3 sets of 4 spacers in 0.25mm stages. Come in a 3D printed silver colour.
 
Set  A  -  2.5mm/2.75mm/3mm
Set  B  -  3.25mm/3.5mm/3.75mm