80/90-17

The 80/90-17 tire is wider and has a lower profile than the 70/100-17, which typically improves grip and cornering stability. The 70/100-17 is narrower with a taller sidewall proportion, often preferred for quicker steering and dirt/trail-style agility.

Size Breakdown (Actual Dimensions)

70/100-17

Width: 70 mm
Sidewall height: 70 mm (100% of 70 mm)
Rim: 17 in

80/90-17

Width: 80 mm
Sidewall height: 72 mm (90% of 80 mm)
Rim: 17 in

Key Differences

Width

80/90-17 is 10 mm wider, creating a larger contact patch for more traction and stability.

Profile / Sidewall

70/100-17 = 100 aspect ratio (taller sidewall relative to width)
80/90-17 = 90 aspect ratio (lower-profile relative to width)

Handling Feel

80/90-17: more planted, better cornering stability
70/100-17: quicker steering response, more agile feel

Common Use Cases

70/100-17: often used on front tires for smaller bikes and off-road/dirt/trail setups
80/90-17: common “all-around” size for street/commuting, stable and predictable

Supermoto

MICHELIN TIRE PILOT STREET 2 FRONT/REAR 90/80-17 46S TL

MICHELIN TIRE PILOT STREET 2 FRONT/REAR 90/90-14 52S REINF TL

SHINKO TIRE SR003 STEALTH FRONT 100/90-12