ALT Mach Rotary Forged 19x8.5 / 20x11 wheels for C8 Corvette Stingray / Z51
WARRANTY
LIFETIME STRUCTURAL WARRANTY
FITMENT
FITMENT GUARANTEED OR MONEY BACK
Pairs well with
The ALT Mach (2025 Model) is the latest evolution of Rotary Forged wheel engineering from ALT Forged, built specifically for the C8 Corvette. Its split-spoke design features a deep dual concave profile and a lifted center cap placement engineered for the C8 hub geometry — no adapters, no guesswork. Available in four curated finishes including Gloss Bronze and Silver Machine Face, the Mach is a clean, purposeful upgrade that accepts OEM C8 tires and center caps right out of the box. Crafted using Rotary Forged construction for a stronger, lighter result than traditional cast wheels. Fender-flush fitment guaranteed.
| Front Wheels | 19x8.5 |
| Rear Wheels | 20x11 |
| OEM Tire Sizes | 245/35/19 Front | 305/30/20 Rear |
| Model | ALT Mach (2025 Model) |
| Construction | Rotary Forged |
| Material | Rotary Forged Aluminum |
| Finish | See Finishes tab |
| Center Caps | Accepts OEM Corvette Caps (Lifted Placement) |
| OEM Tires | Compatible |
| Profile | Deep Dual Concave |
| Valve Stems | Not Included |
| Quantity | Set of 4 Wheels |
| Build Time | Contact Us for Availability |
- Designed for the Best of Performance and Style
- Rotary Forged Construction — Stronger Than Cast, Lighter Than Standard
- Deep Dual Concave Profile
- Fender-Flush Fitment — Guaranteed
- Accepts OEM C8 Tires
- Lifted Center Cap Placement Designed for C8 Hub
- Clearance for the Majority of Big Brake Kits on the Market
- Lightweight Construction in Every Profile
- Maximum Concavity in Every Profile
- Stock TPMS Compatible and Transferable
- Accepts OEM Corvette Center Caps
- Message Us for a Free Custom Render of Your Vehicle
Contact us to confirm current availability on your preferred finish.
No modifications required. The ALT Mach is engineered specifically for the C8 Corvette with a 5x120 bolt pattern, 66.9 hub bore, and lifted center cap placement designed for the C8 hub. Accepts OEM C8 tires, OEM Corvette center caps, and stock TPMS sensors. Fender-flush fitment guaranteed.
Standard finishes are available in-stock and ship faster. Custom and specialty finishes are built to order. Each set is quality inspected before shipment to ensure perfect fitment for your C8 Corvette.
Important Notice
- All timelines are estimates and may vary depending on material availability, production scheduling, and international shipping.
- No rush orders or exceptions can be made for upcoming events, car shows, or deadlines.
- By placing an order, the customer acknowledges and agrees to this production timeline.
We strongly recommend planning your order accordingly to avoid any scheduling conflicts.
Warranty
Structural Warranty
ALT Forged wheels come with a limited lifetime structural warranty, which guarantees that they will be free from defects in materials and workmanship for as long as you own them. Original invoice is required. This warranty covers the structural integrity of the wheels.
Finish Warranty
In addition to the lifetime structural warranty, ALT Forged also offers a one-year finish warranty. This covers any defects in the finish of the wheels, including discoloration, peeling, or fading. If you notice any qualifying defects within the first year of ownership, we will work with you to repair or replace them as needed.
Warranty Claims
To make a warranty claim, contact us using our online form or by phone. Our team will work with you to determine the best course of action, whether that is repairing or replacing your wheels. We pride ourselves on providing fast, efficient service so you can get back on the road as quickly as possible.
Road Hazard Damage
If you damage your wheels due to a road hazard, we will offer you a discount on a replacement wheel and expedite the build time.
Track Use
ALT Forged wheels are not intended for track use. We do not cover damages caused by improper driving. Track wheels demand specific design and engineering.
Cancellation Policy
All wheels are custom built to order. Cancellations requested within 7 days of purchase may be eligible for cancellation, depending on production status. After 7 days, all forged wheel orders are considered final and cannot be canceled under any circumstances. By purchasing this product, you agree to forfeit your deposit in the event of any cancellation request made after the 7-day window.
ALT Mach Rotary Forged 19x8.5 / 20x11 wheels for C8 Corvette Stingray / Z51
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Shipping Information
Inventory Items will ship the same day! Forged order have ETA of 5-6 weeks.
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Customer Support
Give us a call at 818-210-8770 or email info@gemmotorsports.com
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Live sale on orders over $2500 + / Use promo code "SAVE200"
FAQs
Please read our FAQs page to find out more.
What is the ETA for Forged wheels?
Most of the forged wheels we offer are custom-built to order for your specific vehicle. Current estimated production time is 5–6 weeks. Certain finishes, such as Chrome, Two-Tone, or Brushed, may require an additional 1–2 weeks for completion.
Your patience ensures a perfect fit and premium quality—thank you for your order!
Will this fit my car?
All of our products come with a **perfect fit guarantee**—if it doesn’t fit, you get your money back!
Can I cancel my order?
All forged wheel purchases are final sale and non-refundable. If you need to cancel a custom order, we can issue store credit for future use.
For in-stock (inventory) wheel orders, cancellations are subject to a 25% restocking fee.
By completing your purchase, you acknowledge and agree to these terms, including waiving the right to file a chargeback.
Thank you for understanding our policy—we’re here to assist with any questions!
Why? Forged wheels are custom-built for your vehicle with custom specs, colors and design, so we can’t resell them. This policy helps us keep prices fair while ensuring quality craftsmanship.
How can I use Affirm to finance?
- Proceed to Checkout: Add items to your cart and click "Check Out."
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Once approved, you’ll be redirected back to the store with your order confirmed!
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Why Choose Gem Motorsports?
We’re a family-owned business in the heart of Los Angeles, built on three simple promises: honest customer service, unbeatable deals, and top-tier quality.
Every member of our tight-knit team treats this business like our own—because it is. And it shows. Check out our 5-star ratings across eBay, forums, and review sites. In the aftermarket world, that kind of trust is rare—but for us, it’s just the standard.
Why? Because your satisfaction isn’t just our goal—it’s the only way we know how to do business.