Scarlet Racing Supermoto Rim Review: The Perfect 3.00/3.50 Setup for Urban Dominance
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| Scarlet Rim 300/350 |
There is a specific moment in every trail rider's life when they look at the asphalt and think: "What if?" What if I swapped those knobby tires for sticky street rubber? What if I converted this dirt bike into a corner-carving street machine?
The Supermoto culture is exploding globally. Converting a Honda CRF 150L, Kawasaki KLX 150, or Yamaha WR 155R into a Supermoto isn't just about style; it's about unlocking a completely new riding experience. But to do it right, you can't just slap street tires on skinny 21-inch rims. You need width. You need stability.
Enter the Scarlet Racing Supermoto Rim Set. Specifically sized in the "Golden Ratio" for the 150cc-250cc class—3.00 inches front and 3.50 inches rear—these rims are the definitive answer for riders looking to dominate the tarmac. With a price tag of $150 USD, they might just be the best value mod on the market. Let’s break it down.
1. The Geometry of Handling: Why 3.00 and 3.50?
Size matters. When converting to Supermoto (typically moving to a 17-inch ring diameter), choosing the right rim width is critical. If you go too wide (like 4.50 or 5.00), you risk the chain rubbing against the tire or the heavy wheels bogging down your engine. If you go too narrow, you lose that aggressive look and grip.
Scarlet Racing hits the "Sweet Spot" with this set:
The Front: 3.00 Inch
A 3.00-inch front rim allows you to comfortably run a 110/70-17 or 120/70-17 tire. This width spreads the tire profile perfectly, creating a contact patch that offers incredible confidence under hard braking. Unlike skinny stock rims that feel "nervous" on the highway, the 3.00 width feels planted and stable.
The Rear: 3.50 Inch
The 3.50-inch rear is the game-changer. It is designed to accommodate 130/70-17 to 140/70-17 tires. This gives your bike that muscular "Donut" or "Gambot" look that Supermoto fans crave. More importantly, the wider rim supports the tire sidewall during deep lean angles, allowing you to drag a knee (or a boot) with total confidence.
2. Alloy Construction: Built for the Concrete Jungle
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| Scarlet Rim 300/350 |
Supermoto riding is often harder on wheels than dirt riding. Why? Because asphalt doesn't forgive. Hitting a sharp pothole, a manhole cover, or a speed bump at 80 km/h sends a massive shockwave through the wheel.
Scarlet Racing utilizes the same High-Grade Aluminum Alloy found in their enduro line.
Pothole Resistance: The alloy is heat-treated to resist bending. While steel rims might warp permanently after a hard street impact, Scarlet’s alloy has the tensile strength to absorb the energy and keep rolling true.
Reduced Rotating Mass: On the street, acceleration is key. Heavy steel wheels act like flywheels, making the bike accelerate sluggishly. These lightweight alloy rims reduce rotational inertia, making your CRF or KLX feel snappier off the line and more responsive when flicking from left to right in traffic.
3. Visual Impact: The "Show Bike" Aesthetic
Let’s be honest: 50% of the reason we build Supermotos is for the looks. A bike sitting on wide 17-inch wheels just looks aggressive and ready to race. Scarlet Racing amplifies this with their stunning Anodized Finishes.
The color saturation on these rims is deep and glossy. They don't look like cheap painted metal; they look like premium racing components.
The Stealth Build: Black or Silver rims paired with black spokes create a menacing, undercover look.
The Race Replica: Blue (Yamaha), Red (Honda), or Green (Kawasaki) allow you to match your factory plastics perfectly.
The Stunt Style: Gold, Purple, or Orange rims are perfect for riders who want to stand out at the local bike meet or on Instagram/TikTok feeds.
4. Universal Fitment: 36 Holes
The Scarlet Supermoto rims generally come in the standard 36-hole configuration. This is the industry standard for the hubs found on the Honda CRF 150L/250, Kawasaki KLX 150/250, Yamaha WR 155R, and even the Suzuki DRZ.
Whether you are lacing these to your stock hubs (OEM) or upgrading to aftermarket CNC hubs (like the Scarlet or Expedition hubs we reviewed previously), fitment is seamless. The spoke holes are drilled at precise angles to reduce stress on the spoke nipples, ensuring a long-lasting build.
5. Pricing and Value Analysis
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| Scarlet Rim 300/350 |
Converting a bike to Supermoto can be expensive. Tires, tubes, spokes, and rims add up fast. Scarlet Racing offers a massive relief to your budget.
Price: $150 USD (Pair)
The Verdict on Value: For $150 USD, you are getting a front (3.00) and rear (3.50) rim set. This is incredibly competitive. Comparable rims from high-end Japanese or European brands can cost double or triple this amount. Scarlet provides a professional-grade finish and durability that rivals those expensive brands, leaving you with extra cash to spend on high-quality tires.
Important Buying Notes:
Shipping: As always, the $150 USD price does not include shipping. Rims are large and require careful packaging to prevent scratches, so check international shipping rates to your country.
Spokes: Remember, you cannot use your long 18/21 trail spokes. You will need to buy a specific 17-inch spoke set (TDR, Scarlet, or similar) to lace these rims to your hubs.
6. On The Road: Performance Review
Having tested setups like this on a Kawasaki KLX 150, the difference is night and day.
Cornering: With the 3.00/3.50 width, the bike feels like it is on rails. You eliminate the "squirm" of knobby tires. The wider rim spreads the tire carcass, giving you a massive contact patch. You can brake later and carry much higher corner speeds.
Stability: At high speeds (80-100 km/h), the gyroscopic stability of the 17-inch wide wheels makes the bike feel larger and more planted. It eliminates the "wobbly" feeling that tall, skinny dirt wheels often have on the highway.
Braking: The added grip from the wider front tire (supported by the 3.00 rim) means your braking distance is significantly reduced. This is a crucial safety upgrade for city riding.
7. Maintenance for Supermoto Wheels
Street riding brings different challenges than dirt. Here is how to keep your Scarlet rims perfect:
Clean Brake Dust: Supermoto riding involves heavy braking. Brake dust is corrosive and can eat into the anodized finish if left too long. Wipe your rims down with a mild cleaner every week.
Watch the Curbs: While the alloy is strong, grinding a curb while parking is the easiest way to scratch your beautiful rims. Be mindful of your width!
Spoke Torque: Just like dirt wheels, new Supermoto builds need a "break-in." Retighten your spokes after the first 100km of riding to ensure the wheel stays perfectly round.
Conclusion: The Ultimate Street Transformation
If you are looking to transform your trail bike into a canyon carver or an urban assault vehicle, the Scarlet Racing 3.00/3.50 Rim Set is the foundation you need.
It offers the perfect blend of width for performance, strength for durability, and style for aesthetics. For $150 USD, it is an investment that completely changes the personality of your motorcycle. Stop sliding on knobbies and start carving corners with Scarlet.
Which Supermoto style are you building? Are you going for a clean, factory-look Supermoto or a loud, colorful Stunt build? Tell us your rim color choice in the comments below!
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