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.

Shore Durometer A Scale is good, but it does not cover the entire range of skate wheel hardness and is very limited because the scale goes from 1 to 100 and anything over A 95A does not compute accurately.

Shore Durometer B Scale is perfect for skate wheels because:

1. It is very similar to the A Scale, but reads 20 points lower, allowing the useful scale to be extended by 20 points, which covers the entire hardness range of skate wheels in one scale. It uses the same soft spring as the A Gauge, but the conical gauge needle of the D Scale.
2. Because the spring is soft, the B Scale gauge needle does not puncture the skin of the wheel surface, resulting in the same reliable reading as the A Scale does.

Shore Durometer D Scale is designed for hard rubbers and rock hard urethanes, not soft, bouncy urethanes that are used in skate wheels. It has a very stiff spring behind its sharp conical needle and often punctures the skin of the wheel being measured, this resulting in 5-10 points softer reading than is correct. Thus, Shore D Scale should not be used for wheels in the useful skate wheel range.

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.

Product Performance: Many skaters assume the performance and quality of skate wheels are all the same. A wheel is a wheel is a wheel, they might often say. That's actually not the case. In fact, very large differences exist between the raw materials, manufacturing process, quality control and performance of different wheel brands. Up until now though, a wheel's reputation has been a combination of market hype, market muscle, skater support and word of mouth. Bones wheels popularity is largely a result of superior quality, performance and durability.

Real Value: BONES may not be the lowest-priced wheel, but our abrasion test chart shows why Bones is the best value. After all, what good is a cheaper wheel if it flat spots the first day? BONES wheels offer the best combination of product performance, durability, quality, and customer service available today. In other words, you might be able to find a lower price, but never a better value.

Our Strength: All BONES WHEEL unique formulas are solely developed and produced in our own manufacturing plant located in Santa Barbara, CA. Using drastically different physical and engineering properties for each formula, BONES creates unique urethanes for specific applications of skateboarding.