Motorcycle Tube Conversion Chart
Metric tyre size → inch tube size, 10" to 21" rims
Lismore Motorcycles
Each row is listed only where at least two published manufacturer sources agree. Always match the rim size and valve type, and check the size printed on the tyre.
10" rim
70/100-10
→
2.50/2.75-10
12" rim
80/100-12
→
2.75/3.00-12
14" rim
70/100-14
→
2.75/3.00-14
80/100-14
→
2.75/3.00-14
15" rim
150/90-15 · 170/80-15
→
170/80-15 (metric tube, no inch size)
16" rim
100/90-16
→
3.25/3.50-16
110/90-16 · 120/90-16
→
4.00/4.60-16
130/90-16
→
5.00/5.10-16 (MT90-16)
140/90-16
→
5.50/6.00-16 (MU90-16)
17" rim
90/80-17 · 90/90-17 · 100/80-17
→
2.75/3.00-17
100/90-17
→
3.25/3.50-17
110/90-17
→
4.00/4.60-17
120/80-17 · 120/90-17 (rear)
→
4.50/4.75-17
130/80-17
→
5.00/5.10-17
130/90-17 · 140/80-17
→
4.50-5.10-17
150/70-17 · 160/70-17
→
150/160/70-17 (metric tube, no inch size)
18" rim
80/100-18 · 90/90-18
→
2.75/3.00-18
100/90-18 · 110/80-18
→
3.25/3.50-18
110/90-18 · 120/80-18
→
4.00-4.60-18
130/90-18
→
5.00/5.10-18
19" rim
90/90-19
→
2.75/3.00-19
100/90-19 · 110/80-19
→
3.25/3.50-19
21" rim
80/90-21 · 90/90-21 · 80/100-21 · 90/100-21
→
2.75/3.00-21