diff --git a/tire/tire_81.6_50.scad b/tire/tire_81.6_50.scad
index 07cae3d..fdb76bb 100644
--- a/tire/tire_81.6_50.scad
+++ b/tire/tire_81.6_50.scad
@@ -52,13 +52,13 @@ difference() {
   union() {
     translate([0, 0, W]) rotate([180, 0, 0]) {
       rim();
-/*
       // Support ...
       translate([0, 0, SPOKE_THICKNESS+(R_I-2-CUT_BASE)/2+SPACING]) cylinder(r=CUT_BASE, h=W-(SPOKE_THICKNESS+(R_I-2-CUT_BASE)/2+SPACING));
-      translate([0, 0, W-(B_P-FIX_WIDTH-SPACING)+SPACING]) cylinder(r=R_I+B+THICKNESS, h=(B_P-FIX_WIDTH-SPACING)-SPACING);
+      translate([0, 0, W-(B_P-FIX_WIDTH-SPACING)+SPACING]) cylinder(r=R_I+B-SPACING, h=(B_P-FIX_WIDTH-SPACING)-SPACING);
+/*
       translate([0, 0, W-(B_P-FIX_WIDTH-SPACING)-2-B+SPACING]) difference() {
         cylinder(r=R_I+B+THICKNESS, h=(B_P-FIX_WIDTH-SPACING)+2+B-SPACING);
-        translate([0, 0, -0.5]) cylinder(r=R_I+B+SPACING, h=1+(B_P-2-0.2)+2+B-SPACING);
+        translate([0, 0, -1]) cylinder(r=R_I+B+SPACING, h=1+(B_P-FIX_WIDTH-SPACING)+2+B-SPACING-((B_P-FIX_WIDTH-SPACING)-SPACING));
       }
 */
     }