100/90-18 Motorcycle Tires
10 models in 100/90-18, from 6 brands we stock. Order online for delivery, or have them fitted at the shop in Orange.
What 100/90-18 means
100 is the section width in millimetres, measured across the tread. 90 is the aspect ratio: the sidewall is 90% of the section width, which works out to roughly 90 mm here. 18 is the rim diameter in inches — the wheel this tire mounts on.
On most motorcycles a 100/90-18 is a front tire.
The sizes listed for each model are the sizes it is made in. Confirm against the size on your own bike before ordering — wheel swaps change fitment.Every 100/90-18 tire we stock
A dependable bias-ply cruiser tire built for metric and Japanese platforms — the OE-trusted choice for Shadow, V-Star, and Vulcan riders who want mileage and comfort over track credentials.
A dependable bias-ply cruiser tire built for metric and Japanese platforms — the OE-trusted choice for Shadow, V-Star, and Vulcan riders who want mileage and comfort over track credentials.
The D404 is the go-to replacement tire for metric cruiser riders who want honest mileage and predictable street manners without paying for performance they'll never use.
Metzeler's premium long-haul tire built for custom baggers and touring rigs that eat miles without sacrificing predictable handling.
Metzeler's premium long-haul tire built for custom baggers and touring rigs that eat miles without sacrificing predictable handling.
The ME 888 Marathon Ultra is the go-to tire for serious touring and bagger riders who want maximum mileage with dependable, consistent handling from day one to replacement day.
Bias-ply performance with modern wet-grip technology — purpose-built for retro and modern classic bikes that demand both period-correct style and real-world safety.
Bias-ply performance with modern wet-grip technology — purpose-built for retro and modern classic bikes that demand both period-correct style and real-world safety.
The Road Classic is the go-to tire for modern classic and retro-styled bike owners who ride in all conditions and won't compromise the look of their machine for grip.
Pirelli's dual-compound street sport tire built for medium-displacement riders who want real grip on weekdays and weekends without burning through rubber.
Pirelli's dual-compound street sport tire built for medium-displacement riders who want real grip on weekdays and weekends without burning through rubber.
The Sport Demon is the go-to for medium-displacement street riders who split time between the daily commute and weekend canyon runs and need a tire that handles both honestly.
Pirelli's premium adventure-touring tire built for riders who split time between canyon roads, commutes, and gravel exploration — without compromising either end.
Pirelli's premium adventure-touring tire built for riders who split time between canyon roads, commutes, and gravel exploration — without compromising either end.
Best suited for adventure and crossover riders who prioritize wet-weather confidence and pavement performance with honest light off-road capability on the side.
Metzeler's refined sport-touring tire engineered for high-mileage street riders who demand all-weather confidence without giving up spirited handling.
Metzeler's refined sport-touring tire engineered for high-mileage street riders who demand all-weather confidence without giving up spirited handling.
The Roadtec 01 is built for serious street miles — ideal for Orange County riders who split time between the 55 freeway and Ortega Highway without swapping tires.
Avon's dual-compound sport-tourer built for riders who refuse to choose between canyon grip and commuter longevity.
Avon's dual-compound sport-tourer built for riders who refuse to choose between canyon grip and commuter longevity.
Best suited for the rider who splits time between spirited street riding and longer touring miles and wants one tire that handles both without compromise.
Pirelli's street-smart sport tire built for daily riders who want real-world grip, reliable wet performance, and mileage that actually makes sense.
Pirelli's street-smart sport tire built for daily riders who want real-world grip, reliable wet performance, and mileage that actually makes sense.
Best suited to daily sport riders and canyon weekend warriors who need durable, all-condition performance without sacrificing Pirelli's handling reputation
Metzeler's premium bias-ply touring tire — built for classic bikes, all-weather commuters, and riders who demand modern grip from traditional construction.
Metzeler's premium bias-ply touring tire — built for classic bikes, all-weather commuters, and riders who demand modern grip from traditional construction.
The Lasertec is the go-to choice for classic and vintage bike owners who need modern wet-weather grip and long mileage in a bias-ply fitment.
A true 50/50 dual-sport tire built for riders who split time between pavement connectors and genuine dirt — without blowing the budget.
A true 50/50 dual-sport tire built for riders who split time between pavement connectors and genuine dirt — without blowing the budget.
The K270 is the right call for budget-aware dual-sport riders who spend real time off pavement and just need the road to get there.
Brands that make a 100/90-18
Other common sizes
Running a different size front and rear? These are the other sizes we stock, closest wheel diameter first.
Before you buy
- When to replace your motorcycle tires
- How long do motorcycle tires last?
- Reading the DOT date code on a tire
- Setting motorcycle tire pressure
- Bias-ply vs radial motorcycle tires
- Why tire balancing matters
Fitting a 100/90-18 at MTC
We mount and balance every tire we sell, and tires you bring in. Walk-ins welcome at the Orange shop, or book a slot so the bay is ready when you arrive.