For an 80/100-21 motorcycle tire setup, first decide whether you need a complete front-and-rear tire set or only a replacement inner tube. The Pirelli Scorpion MX Extra X set is the direct tire-set choice, while the PIVOTRAX and Tusk options are single heavy-duty tubes. A two-pack of replacement tubes suits riders who want a spare; the Pirelli Mid-Soft Stadium set is another front-tire option with a different rear size.
| Product | Type | Best suited for |
|---|---|---|
| Pirelli Scorpion MX Extra X | Front and rear tire set | Buyers seeking an 80/100-21 front tire |
| PIVOTRAX Heavy Duty | Inner tube | Riders seeking a 3 mm tube |
| Replacement Tube 2-Pack | Two inner tubes | Buyers who want a spare tube |
| Pirelli Mid-Soft Stadium | Front and rear tire set | Buyers comparing another 80/100-21 front option |
| Tusk Heavy Duty | Inner tube | Riders seeking a 2 mm butyl tube |
Pirelli Scorpion MX Extra X Tire Set
This set includes an 80/100-21 front tire and a 110/90-19 rear tire. It is best for buyers replacing both tires who need the listed front size and a 110/90-19 rear. It was selected because the front matches the requested 80/100-21 dimension and the product is sold as a pair. The limitation is that the rear is a specific size, so confirm it matches the motorcycle’s required rear fitment before ordering.
PIVOTRAX 3 mm Heavy Duty Tube
This heavy-duty tube is listed for 80/100-21 or 90/90-21 sizing and has a 3 mm thickness with a TR4 valve. It is best for riders who need a tube rather than a tire and prioritize the thicker construction specified in the product name. It was selected for its direct size match and clearly stated tube thickness. Check that the TR4 valve and tube sizing suit the wheel; this product is an inner tube only, not a tire.
80/100-21 Replacement Tube 2-Pack
This listing provides two tubes sized for 80/100-21, also described as 2.75/3.00-21, with straight TR4 valve stems. The product is described as heavy-duty, thick premium rubber. It is best for a rider who wants a replacement tube plus a second tube to keep as a spare. The two-pack is the main reason it stands out against single-tube options. The supplied details do not specify a millimeter thickness, so choose another listing if a precise wall measurement is essential.
Pirelli Scorpion MX Mid-Soft Stadium Set
This Pirelli set pairs an 80/100-21 front tire with a 120/80-19 rear tire. It is best for buyers whose motorcycle calls for that rear size and who are comparing a set identified as Mid-Soft Stadium. It was included because its front tire matches the requested dimension, while the rear differs from the Extra X set. The product name alone does not provide further construction or performance details, so confirm the exact fitment and intended use before selecting it.
Tusk Heavy Duty 2 mm Inner Tube
The Tusk tube is sized 80/100×21 and uses 2 mm butyl rubber, with a centered TR-4 valve stem. Its listed features include air retention and resistance to aging and heat. It is best for riders who want a single tube with stated material, thickness, and valve information. It was selected as a clearly specified alternative to the 3 mm PIVOTRAX tube. Its wall is thinner than the PIVOTRAX’s listed 3 mm, so compare that detail if tube thickness is your priority.
Buying Guide: Choosing an 80/100-21 Tire or Tube
Do you need a tire or an inner tube?
A tire is the outer component that contacts the riding surface. An inner tube sits inside a compatible tire and holds air. The Pirelli listings are tire sets; the PIVOTRAX, replacement two-pack, and Tusk listings are tubes. Confirm which part needs replacement before buying, since a tube is not a substitute for a worn or damaged tire.
How should you compare tube thickness?
Compare stated thickness only when it is provided: PIVOTRAX lists a 3 mm wall, while Tusk lists 2 mm. The two-pack is described as heavy-duty but does not state a wall measurement in the supplied details. Thickness is one comparison point, not proof of suitability for every riding condition or wheel setup.
What should you check before ordering?
- Match the front tire or tube size to the motorcycle and rim requirements in the owner’s manual or existing tire markings.
- For a tire set, verify both sizes. These options pair 80/100-21 fronts with either 110/90-19 or 120/80-19 rears.
- Check valve type and position. The tube listings specify TR4 stems, and the two-pack describes its stem as straight.
- Confirm whether the listing includes one item, two tubes, or a front-and-rear tire pair.
Frequently Asked Questions
What does 80/100-21 mean?
It is a tire size designation. The product listings use it for a 21-inch front tire or a compatible inner tube; confirm fitment against the motorcycle’s specifications.
Can I use an 80/100-21 inner tube with any 21-inch tire?
No. The tube must match the tire’s size range and the wheel setup. Check the manufacturer’s fitment information rather than relying on rim diameter alone.
Which listed tube has the thickest stated wall?
PIVOTRAX lists a 3 mm wall. Tusk lists 2 mm, while the two-pack description does not provide a millimeter measurement.
Are the Pirelli products single tires?
Both are presented as front-and-rear tire sets. One pairs an 80/100-21 front with a 110/90-19 rear; the other pairs it with a 120/80-19 rear.