Do they stay in place while driving on and off on a cement garage floor?

No, they did not stay in place for me and my car - GT500. The ramp part is too high. For me, driving on/into them, I was able to finally get into them. But backing out of them was a complete failure. The rear lip is too high. I actually spun the rear tires trying to back out of them. The front tires would not roll out over the rear lip - too high. They slid along the garage floor. As the rear tires spun, the rear kicked out and slammed into the fronts. Simply a very bad design. "FLATSTOPPERS" from Race Ramps - the ramp is not as steep and the rear lip is not as high. They cost s little more, but they work!! Hope my answer helps.

maximum tire diameter? 20 inch?

Without measuring, I'd say at least 20" and a little wiggle room. Mine have last 3 years + without any issues and best of all. No flat spots on the tires. A great product.

what's the largest tire this will fit? I have 35x12.5r15 tires on my jeep.

It is 14 1/2 inchs wide. How wide is the tire?

Could I park a C6 corvette on these?

I bought these to fit under my 2007 SL550 Mercedes convertible(RWD) and they slipped out , actually shot out every time I tried to roll onto it. They are hard and slick. You may need to have a rough non skid floor or apply tape under. Yes I think your corvette would fit. I may consider a different brand.

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MAXSA 37353 ParkRight Prevent Flat Spots Tire Saver Storage Ramps Black 4PK

MAXSA 37353 ParkRight Prevent Flat Spots Tire Saver Storage Ramps Black 4PK

Product ID: 19303540

Details

Brand
Maxsa
Color
Black
Item Weight
22.8 pounds
Material
Polypropylene
Product Dimensions
21.5"L x x

💪Supports up to 10 tons heavy-duty strength

🛑Non-slip rubber feet for stable storage

🛞Prevents flat spots for tire longevity

€ 569.59

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Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛞 Elevate Your Storage Game — Keep Tires Fresh, Flat-Spot Free & Ready to Roll!

BUILT TO ENDURE HEAVY LOADS - Crafted from heavy-duty polypropylene with cross-ribbed reinforcement, each ramp supports up to 10 tons effortlessly.
EFFORTLESS SETUP IN MINUTES - Simply reverse your vehicle onto the ramps and let the rounded cradle do the rest—no tools or hassle required.
KEEP YOUR TIRES PERFECTLY ROUND - Curved ramp design prevents flat spots during long-term storage, preserving tire integrity and performance.
STAY PUT WITH ANTI SLIP TECHNOLOGY - Integrated non-slip rubber feet ensure your ramps stay firmly in place on any surface, with extra pads available for slick floors.
UNIVERSAL FIT FOR ALMOST ANY VEHICLE - 20% longer and twice as wide than standard ramps, accommodating a wide range of tire sizes and wheel types.

The MAXSA 37353 ParkRight Tire Saver Ramps are a premium set of four heavy-duty polypropylene ramps designed to prevent flat spots on tires during extended vehicle storage. Measuring 21.5” x 14.2” x 3.4” and supporting up to 10 tons each, these ramps feature a curved design for even weight distribution, non-slip rubber feet for stability, and a universal fit that accommodates most tire and wheel types. Ideal for classic cars, RVs, and seasonal vehicles, they ensure your tires stay round and ready, protecting your investment with minimal effort.

Specifications

ASIN	B00U7HMZZO
Best Sellers Rank	#222,634 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #246 in Material Handling Ramps
Brand Name	Maxsa Innovations
Color	Black
Customer Reviews	4.3 4.3 out of 5 stars (483)
Global Trade Identification Number	00857170005027
Included Components	Park Right Flat-free Tire Ramps, 4 Pk
Item Dimensions L x W x H	21.5"L x 14.2"W x 3.38"H
Item Highlight	Prevents Out-of-Round Tires, Set of 4 each 21.5 x 14.2 x 3.4” Heavy Duty, Supports 10 Tons, Includes No Slide Pads, Black
Item Type Name	Park Right Tire Saver Ramps for Flat Spot Prevention and Vehicle Storage (Set of 4), Black (37353-BK)
Item Weight	22.8 pounds
Load Capacity	5 tons
Manufacturer	Maxsa
Manufacturer Part Number	37353
Manufacturer Warranty Description	Maxsa innovations, llc warrants to the original consumer/purchaser that this product shall be free of defects in material and workmanship under normal use and circumstances for a period of ninety (90) days from the date of original purchase for use. When the original consumer/purchaser returns the product pre-paid (consumer pays return shipping) to maxsa innovations, llc, 8412 cathedral forest dr;…
Material Type	Polypropylene (PP)
Model Number	37353
Number of Items	4
UPC	857170005027

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€ 569.59

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Greece.

Secure transaction

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