Description
Get maximum grip in the dirt with Stealth Bomber knobby tires from Electric Dirt Bikes Direct, priced at $110. These OEM 21 x 3.0 in motorcycle-tread tires are built for traction in technical terrain, from loose climbs and rocky singletrack to mud and roots. They are a direct OEM fit for the Stealth Bomber’s 21 x 3.0 in wheels.
Finished in black to match the factory look, they restore the bite your bike had when it was new. Order online with secure checkout or visit our showroom at 45-53 North St, Middletown, NY 10940.
Stealth Bomber knobby tires specifications
| Feature | Detail |
|---|---|
| Part | OEM motorcycle-tread tires |
| Size | 21 in diameter x 3.0 in width |
| Tread | Knobby motorcycle tread for maximum grip in dirt |
| Best for | Trails, technical terrain, loose dirt and mud |
| Color | Black |
| Fits | Stealth Bomber with 21 x 3.0 in wheels |
| Condition | New, OEM |
| Price | $110 |
Why buy Stealth Bomber knobby tires from Electric Dirt Bikes Direct
We focus on electric dirt bikes and the parts that keep them running. We sell the Stealth Bomber and its OEM parts, so we can help you pick the right tire for your trails.
- Genuine OEM: the motorcycle tire option offered on the Stealth Bomber.
- Clear pricing: $110, listed right on this page.
- Real showroom: visit us at 45-53 North St, Middletown, NY 10940.
- Straight answers: email sales@electricdirtbikesdirect.org about sizing and fitment.
Need other spares? Browse all our electric dirt bike parts and accessories.
Stealth Bomber knobby tires: built for grip in technical terrain
A knobby tire works by digging in. Tall, spaced blocks bite into loose dirt, clay and grass, while the gaps between them let mud and debris clear as the tire turns. That self-cleaning action keeps grip consistent through the ride instead of turning the tread into a slick.
On a powerful hybrid like the Stealth Bomber, that grip matters. Instant electric torque needs a tire that can put the power down without spinning, especially on steep, loose climbs.
Braking and cornering on Stealth Bomber knobby tires
Knobby tread also helps when you slow down and turn. The edges of the blocks dig into the trail surface, giving the front tire bite as you lean into a corner and helping the rear tire hold a line under braking. On loose descents, that extra control makes the bike feel calmer and more predictable.
Stealth Bomber knobby tires vs turtle tires
| Feature | Stealth Bomber knobby tires | Stealth Bomber turtle tires |
|---|---|---|
| Tread | Tall, spaced motorcycle knobs | Flattened, continuous |
| Best surfaces | Dirt, mud, roots, rocks | Pavement, gravel, hardpack |
| Grip on loose ground | Excellent | Limited |
| Tread life on pavement | Shorter | Long |
| Size | 21 x 3.0 in | 21 x 3.0 in |
| Price | $110 | $120 |
Pick Stealth Bomber knobby tires if your riding is mostly off-road. If you spend more time on hard surfaces, see our Stealth Bomber turtle tires.
Who should buy Stealth Bomber knobby tires?
- Trail riders who want confident grip on loose and technical ground.
- Hill climbers who need traction to put the power down.
- Riders in wet regions who regularly ride through mud.
- Owners with worn knobbies that have lost their edges.
- Riders switching from turtle tires for more off-road riding.
Which bikes do Stealth Bomber knobby tires fit?
These tires are sized 21 in x 3.0 in for the Stealth Bomber’s 21 x 3.0 in wheels. They will not fit the 26 x 4 in fat bike wheel option. Check the size on your current tire sidewall, or send us a photo if you are not sure.
Please confirm the quantity you need before ordering, and contact us if you are unsure whether you are replacing the front, rear or both.
How to fit Stealth Bomber knobby tires
With the right tools, changing a tire is a manageable home job. Otherwise, any bike or motorcycle shop can fit them for you. As a general guide:
- Switch the bike off, remove the key and put it on a stable stand.
- Remove the wheel, noting the spacers, brake rotor and, at the rear, the chain.
- Deflate the tire fully and break the bead on both sides.
- Lever the old tire off carefully, protecting the rim and inner tube.
- Inspect the tube and rim strip and replace them if worn.
- Fit the new tire, following any rotation arrow on the sidewall.
- Inflate slowly until the bead seats evenly all the way around.
- Refit the wheel, set chain slack, torque the axles and test the brakes.
Setting pressure on Stealth Bomber knobby tires
Pressure is one of the easiest ways to tune grip. Lower pressure, within the range on the sidewall, lets the knobs flex and wrap over rocks and roots for more traction. Higher pressure protects against pinch flats on rocky, fast trails and suits hardpack. Start with the recommended pressure and adjust in small steps.
Breaking in new Stealth Bomber knobby tires
New tires have a slick surface from manufacturing. Ride gently for the first few miles, avoiding hard braking and steep lean angles, and let the edges of the knobs scuff in before you push hard.
Riding techniques for Stealth Bomber knobby tires
On climbs, keep your weight forward and roll on the throttle smoothly so the rear tire grips rather than spins. In corners, weight the outside peg and look through the turn. On descents, use both brakes progressively and keep the bike upright over loose rock. Smooth inputs let the knobs do their job.
Riding in mud with Stealth Bomber knobby tires
Mud is where knobby tread earns its keep. Keep a steady throttle and momentum, pick the line with the most grip and avoid sudden braking or steering. The spacing between the knobs helps clear mud as the wheel turns. After the ride, rinse the tires and wheels with a gentle hose and check the tread for trapped stones or sticks.
Rocks, roots and loose climbs
On rocky and rooty trails, stand on the pegs, keep your knees bent and let the bike move beneath you. Hit roots as square as you can and avoid braking on them. On loose climbs, look ahead to the top, keep your weight forward and roll on smoothly to keep the rear tire biting.
Caring for Stealth Bomber knobby tires
- Check pressure before every ride.
- Look for torn or missing knobs, cuts and sidewall damage.
- Clear stones and debris from the tread after each ride.
- Keep oil, chain lube and brake fluid off the rubber.
- Avoid long stretches of fast pavement, which wear knobs quickly.
When to replace Stealth Bomber knobby tires
Replace your tires when the knobs are rounded off, torn or worn short, or when you see cracks or bulges in the sidewall. Worn knobbies slip on climbs, wash out in corners and take longer to stop. Fresh Stealth Bomber knobby tires bring back the bite and confidence your bike had when new.
Inner tubes and rim strips
When you change a tire, check the inner tube for patches, thin spots or valve damage, and replace it if in doubt. Make sure the rim strip covers every spoke hole, since an exposed spoke end can puncture a tube within miles.
Tools you will need
A bike stand, socket and wrench set, two or three tire levers, a pump with a gauge, some soapy water for the bead and a torque wrench for the axles cover most tire changes.
Keep a set of each tire
Many owners run Stealth Bomber knobby tires for trail days and keep a second wheel set with turtle tires for road and gravel days. Swapping complete wheels is faster than changing tires, and each set is ready when you need it.
Riding responsibly off-road
Ride on private land, motocross tracks and designated off-highway vehicle areas, and respect trail closures. Always wear a DOT-approved helmet, goggles, gloves, boots and protective gear. For trail access, rider advocacy and events near you, visit the American Motorcyclist Association.
Choosing tires for your riding
Think about where you ride most. If the majority of your miles are on dirt trails, tracks or wooded singletrack, Stealth Bomber knobby tires are the right choice. If you mostly ride pavement or gravel, turtle tires last longer and roll more smoothly. For sand and snow, the fat tire option is hard to beat.
Range and rolling resistance
Knobby tread flexes more than a smooth tire on hard ground, which uses a little more energy. On dirt, that is a fair trade for the grip you gain. To get the most range from Stealth Bomber knobby tires, run the correct pressure, ride smoothly and avoid long stretches of fast pavement.
Hybrid riding on the trail
The Stealth Bomber’s working pedals and 7-speed drivetrain are useful off-road too. On long, steady climbs, adding a little pedal effort takes some load off the battery, while the knobby tread keeps the rear tire biting on loose ground.
Wheel and spoke care
Spoked wheels are strong but need occasional checks. Tap each spoke with a small wrench and listen for a similar ring. A dull sound usually means a loose spoke. Tighten gradually and evenly, and have a shop true any wheel that wobbles. Check the wheel bearings for play at the same time.
Reading your tire sidewall
The sidewall shows the size, recommended pressure range, rotation direction and often a date code. Check these before fitting so the tire goes on the right way and is inflated correctly. Rubber hardens with age even when the tread looks new, so fresher tires grip better.
Checking the bike after a puncture
If you get a flat, find the cause before fitting a new tube. Feel carefully around the inside of the tire for thorns or sharp stones, and check the rim strip. Fixing the cause prevents a repeat puncture a few miles later.
Storing spare tires
Keep spare Stealth Bomber knobby tires indoors, somewhere cool, dry and dark, away from heaters, electric motors and chemicals. Sunlight and heat harden rubber over time, which reduces grip.
Safety gear
Off-road riding calls for full protection: a DOT-approved helmet, goggles, gloves, over-the-ankle boots, and chest and knee protection. Ride within your skill level and ride with a partner in remote areas.
Plan your next ride
Before a big trail day, charge the battery fully, check the weather and pick a route that suits your range and experience. Tell someone where you are going, carry water, a phone, a spare tube and a small tool kit, and plan to return with charge to spare.
Sand and soft ground
Deep sand is tough on any 21 in tire. Keep your weight back, stay on the throttle to keep the front light and avoid sharp steering inputs, which can make the front wheel dig in. Lower tire pressure within the recommended range helps the tire float. If you ride in sand often, consider the fat tire option for that terrain.
Riding in groups
Group rides are safer and more fun. Ride at a pace that suits the least experienced rider, leave space between bikes on dusty trails and regroup at junctions so no one takes a wrong turn. Agree on hand signals for stopping and hazards before you set off.
Trail etiquette
Electric bikes are quiet, so hikers, horses and other riders may not hear you coming. Slow down when you meet others, give them room and say hello. Stay on marked trails, avoid riding wet trails that are easily damaged and pack out everything you bring in. Responsible riding keeps trails open for everyone.
Electric riding, simplified
An electric bike needs far less routine work than a gas one. There is no fuel to mix, no oil to change and no carburetor to clean. Most care comes down to tires, brakes, chain and battery, so fitting fresh tires when they wear out is one of the best investments you can make in grip, safety and fun on every ride.
Cleaning after a muddy ride
Mud left to dry on the bike makes the next ride harder and can hide damage. Rinse the wheels, tires and frame with a gentle hose as soon as you can, working from top to bottom. Avoid pointing high-pressure water at wheel bearings, the motor or electrical connectors. Dry the chain, lube it, and take a minute to look over the tires for cuts or torn knobs while they are clean.
Transporting the bike
When you load the bike into a truck or trailer, use a wheel chock and soft loops on the handlebar. Compress the fork slightly as you tighten the straps, but never fully. Check that nothing rubs against the tires during the journey, and recheck strap tension after the first few miles. A few extra minutes of care at the start of a trip saves damaged parts and stress later.
Pre-ride tire check
- Pressure set for the trail conditions
- No torn knobs, cuts or bulges
- Axle nuts tight and wheels spinning true
- Brakes firm and rotors clean
Why choose OEM Stealth Bomber knobby tires?
OEM tires are the size and type the Stealth Bomber was designed around, so handling, clearance and speedometer readings stay as intended. They fit the stock rims properly and give predictable grip from the first ride.
The Stealth Bomber
Do not own a Stealth Bomber yet? It is a 72V hybrid electric dirt bike with working pedals and motor options from 5,000W to 15,000W. See our Stealth Bomber for sale page or browse our More Brands electric dirt bike collection.
Help from our team
Not sure whether knobby or turtle tires suit your riding? Email sales@electricdirtbikesdirect.org or visit our Middletown, NY showroom. We can also help with other parts and accessories for your Stealth Bomber.
After your order arrives, we are still here for questions about fitting, tire pressure and choosing between Stealth Bomber knobby tires and turtle tires.
How ordering works
- Add the Stealth Bomber knobby tires to your cart.
- Check out securely online.
- We confirm your order by email and arrange shipping anywhere in the U.S. or worldwide.
- Fit the tires, set the pressure and ride.
Stealth Bomber knobby tires FAQ
What size are Stealth Bomber knobby tires?
21 in diameter and 3.0 in wide.
What are they best for?
Dirt trails, technical terrain, loose climbs and mud.
Will they fit the 26 x 4 in fat bike wheels?
No. They fit the 21 x 3.0 in wheels only.
Are these the same as the Stealth Bomber motorcycle tires?
Yes. These are the OEM 21 x 3.0 in motorcycle-tread tires for the Stealth Bomber.
Can I ride them on pavement?
Yes, but knobby tread wears faster and grips less on pavement. Turtle tires suit hard surfaces better.
Order your Stealth Bomber knobby tires today
Ready for more grip on the trail? Add Stealth Bomber knobby tires to your cart and check out securely for $110. Questions first? Email sales@electricdirtbikesdirect.org.
