diff --git a/py/hexagram/tacho.py b/py/hexagram/tacho.py
index b658c00..d9492db 100644
--- a/py/hexagram/tacho.py
+++ b/py/hexagram/tacho.py
@@ -2,34 +2,11 @@ import enum
 import math
 import cairo
 
-from hexagram.dial import Dial
-
-class Gear(enum.Enum):
-    R       = -1
-    N       =  0
-    GEAR_1  =  1
-    GEAR_2  =  2
-    GEAR_3  =  3
-    GEAR_4  =  4
-    GEAR_5  =  5
-    GEAR_6  =  6
-    GEAR_7  =  7
-    GEAR_8  =  8
-    GEAR_9  =  9
-    GEAR_10 = 10
-
-    def __str__(self):
-        strs = {
-            -1: 'R', 0: 'N', 1:   '1',
-             2: '2', 3: '3', 4:   '4',
-             5: '5', 6: '6', 7:   '7',
-             8: '8', 9: '9', 10: '10'
-        }
-
-        return strs.get(self.value, '?')
+from hexagram.dial  import Dial
+from hexagram.trans import Gear, ShiftMode
 
 class Tacho(Dial):
-    __slots__ = 'gear',
+    __slots__ = 'gear', 'shift_mode',
 
     MIN_ANGLE = 232.0 * (math.pi / 180.0)
     MAX_ANGLE = 488.0 * (math.pi / 180.0)
@@ -40,7 +17,8 @@ class Tacho(Dial):
         super().__init__(x, y, radius, self.MIN_ANGLE, self.MAX_ANGLE, 0, max_value)
 
         self.value = 0
-        self.gear: Gear = Gear.N
+        self.gear:       Gear      = Gear.N
+        self.shift_mode: ShiftMode = ShiftMode.NORMAL
 
     def draw_number(self, cr: cairo.Context, radius: float, value: float, text: str):
         scale = value / self.max_value
@@ -79,10 +57,21 @@ class Tacho(Dial):
 
             self.draw_number(cr, 0.69, speed, "%d" % int(speed / 1000))
 
+    def gear_text(self):
+        text = ''
+
+        if self.shift_mode.value >= ShiftMode.SPORT.value \
+          and self.gear.value >= Gear.GEAR_1.value:
+            text += 'R'
+
+        text += str(self.gear)
+
+        return text
+
     def draw_fg(self, cr: cairo.Context):
         super().draw_fg(cr)
 
-        text = str(self.gear)
+        text = self.gear_text()
 
         cr.select_font_face("HEX:gon Bold Italic")
 
@@ -96,4 +85,4 @@ class Tacho(Dial):
         cr.move_to(self.x - width / 2,
                    self.y + height / 4)
 
-        cr.show_text(str(self.gear))
+        cr.show_text(text)