Parts Unlimited Heavy Duty Tubes
Heavy Duty inner tubes from Parts Unlimited, fit by tire size.
16 fitments · 8 wheel sizes · 16 in stock — from $9. Order online or install at MTC Orange County.
The Parts Unlimited Heavy Duty Tubes line covers 8 wheel sizes (10″–21″) across 16 fitments — for scooters and small-wheel machines, cruisers, baggers, and touring bikes, spoked sport and standard bikes, dual-sports, adventure bikes, and vintage iron, adventure and dirt bike fronts. Thick-wall heavy-duty construction that resists pinch flats under load and at the low pressures off-road riding demands.
Find your fitment by the size printed on your tire sidewall (for example, a 90/100-18), pick the matching tube, and order it shipped or install it at MTC. Spoked wheels need a tube; if you're unsure, we'll confirm the right one.
Valve stems in this family: TR4. The stem has to clear your wheel, so match the code on the fitment you pick.
Valve stems in this family: TR4. The stem type must clear your wheel — match the code above, or call (714) 516-9059 and we’ll confirm it.
Tube-type (spoked-wheel) tires we stock in sizes this family covers. Check your wheel — a cast wheel runs the same size tubeless and needs no tube.
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.
Michelin's factory-spec cruiser tire built exclusively for Harley-Davidson — OE performance with all-weather confidence for the miles-hungry rider.
Michelin's factory-spec cruiser tire built exclusively for Harley-Davidson — OE performance with all-weather confidence for the miles-hungry rider.
The Scorcher 31 is the benchmark street tire for Harley-Davidson riders who demand long-lasting, all-weather grip without giving up street feel.
Michelin's most versatile off-road compound — built for mixed terrain, weekend warriors, and dual-sport riders who need grip that lasts.
Michelin's most versatile off-road compound — built for mixed terrain, weekend warriors, and dual-sport riders who need grip that lasts.
Best suited for trail riders and dual-sport adventurers who cover varied ground and want proven grip without burning through tires every few rides.
Michelin's dedicated mud weapon — built for riders who thrive when conditions turn wet, sloppy, and brutal.
Michelin's dedicated mud weapon — built for riders who thrive when conditions turn wet, sloppy, and brutal.
The StarCross 6 Mud is the right call for riders who spend serious time in wet, soft conditions and need a tire that works harder as the going gets worse.
Michelin's proven StarCross motocross technology scaled specifically for youth racers and small-bore off-road machines — built to develop riders, not just fit smaller bikes.
Michelin's proven StarCross motocross technology scaled specifically for youth racers and small-bore off-road machines — built to develop riders, not just fit smaller bikes.
The StarCross 5 Mini is the go-to off-road tire for youth motocross racers and small-bore enthusiasts who want genuine Michelin performance in the right size.
Michelin's dedicated sand specialist — purpose-built for dune riders, desert explorers, and off-road competitors who live in the loam.
Michelin's dedicated sand specialist — purpose-built for dune riders, desert explorers, and off-road competitors who live in the loam.
The go-to tire for dune riders and desert racers who spend their weekends in soft, loose terrain and need grip that doesn't quit mid-ride
Michelin's purpose-built soft-terrain motocross tire — engineered for mud, sand, and wet conditions where traction is everything.
Michelin's purpose-built soft-terrain motocross tire — engineered for mud, sand, and wet conditions where traction is everything.
Built for mud racers and variable-condition trail riders who need maximum traction when the ground turns soft, wet, or sandy.
Dunlop's latest-gen motocross tire built for mixed terrain dominance — from hardpack to soft loam, front and rear, youth to full-size.
Dunlop's latest-gen motocross tire built for mixed terrain dominance — from hardpack to soft loam, front and rear, youth to full-size.
Built for motocross racers and aggressive trail riders who need reliable, consistent grip across changing terrain conditions throughout a full moto or ride.
47 fitments · 8″–23″
47 fitments · 8″–23″
21 fitments · 10″–21″
21 fitments · 10″–21″
20 fitments · 16″–21″
20 fitments · 16″–21″
18 fitments · 10″–23″
18 fitments · 10″–23″
Do I need a heavy-duty tube?
If you air down for dirt, carry a passenger or gear, or run a heavy bike, yes — the thicker wall resists pinch flats and heat that thin tubes suffer under load. For street-only riding, a standard tube is fine.
How do I know which valve stem I need?
This family ships with TR4 stems, and the exact code is listed against every fitment in the table above. The stem must line up with the hole in your rim and clear the brake/sprocket side, so match the code on the tube to the one that came out of your wheel — or bring the wheel in and we'll check it.
Which tire sizes does one of these tubes cover?
Each row in the table above lists the manufacturer's own fitment range verbatim — many tubes cover several tire sizes on the same wheel diameter (for example a 3.25/4.10 tube fits both of those widths on its rim). Pick the row whose range includes the size printed on your sidewall.
Does MTC install Parts Unlimited tubes?
Yes — we mount and balance your tire and tube in-shop, or ship the tube to your door. Call (714) 516-9059 with your tire size and we'll pull the exact Parts Unlimited tube.