Check the listing for details. Bones STF Retros V4 53mm 99a Wheels - White (Set of 4). Width: 34, Condition: New. Listed at 39.00 USD. Bones STF Retros V4 53mm 99a Wheels - White (Set of 4) Bones Street Tech Formula powers the legendary Bones STF wheels that roll fast, grip when you need to and slide when you want to, without flat spotting. STF gives you more control to skate with confidence. Bones STF wheels outperform all other wheels, and because they wear so well, they last several times longer than normal wheels, making STF wheels the best for less. Bones STF wheels are available in the original 103A and the new 99A Easy Streets for greater roll, control and softer landings on rougher terrain. All BONES WHEELS manufactured products are warranted against manufacturing defects for the useful life of the product. If you feel your skateboard wheels, bushings, or other BONES WHEELS products were defective, you may send it back to us, freight prepaid. We will inspect it and let you know of our findings. If we decide your returned product was defective or failed to give reasonable service, we will replace that product with a similar, available product of the same or better quality and pay for the shipping back to you. You can send in multiple products to be inspected for your return. We will evaluate each product separate and will replace any and all products found to be defective. Features: Construction: Street Tech Formula (STF) Diameter: 53mm Width: 34mm Durometer: 99a Surface: Smooth Shape: V4 Color: White At SkatesUSA our primary goal is to give our customers the best deals on skateboards, longboards, scooters and bikes at the lowest price. That is our commitment to you, our valued customer.