If you bowl USBC national events, the question is not “is urethane banned.” The question is “banned where.”
Because there is no single answer. Starting January 1, 2026, USBC set up three different rules for three different groups of events. At some, your urethane is dead on arrival. At others, it is fine as long as it is hard enough. And at one big youth event, it depends on what round you are in.
We pulled the full list straight from USBC so you do not have to guess before you pack your bag. Here is exactly where your urethane can and cannot go. If you want the background on the new USBC urethane rule itself, we broke that down separately.
One thing to get straight first
When USBC says “urethane,” they do not just mean the coverstock. They mean a category they now call slow oil-absorbing high-performance balls. That is the official language, and it matters, because the rule is written around oil absorption time and core, not just the label on the box.
Two facts apply everywhere before we even get to the event list:
Any slow oil-absorbing high-performance ball made before August 1, 2022 is ineligible for every USBC national tournament. Hardness does not save it. If it was built before that date, it is out.
And as of December 31, 2025, any new ball in this category with an oil absorption time over 90 minutes has to be at least 78D hardness just to get USBC approved for sale in the US. So the softer blocks that made the Purple Hammer famous are not getting approved going forward.
Now to the events.
The quick-reference table
Here is the whole thing at a glance. Details on each group below.
| Tier | What it means | Events |
|---|---|---|
| Banned outright | No urethane, any hardness | U.S. Open, USBC Masters, PWBA Tour (incl. U.S. Women’s Open, USBC Queens, PWBA Regionals), U22 Masters and Queens, USBC Collegiate Sectionals, Intercollegiate Team and Singles (Nationals), USA Bowling National Championships |
| Allowed if 78D | Legal only at 78D hardness or harder | USBC Open Championships, USBC Women’s Championships, Bowlers Journal Championships, USBC Senior Masters, USBC Super Senior Classic, USBC Senior Queens, Youth Open Championships |
| Restricted | Qualifying only | Junior Gold Championships |
| No change | Rules unchanged | Team USA Trials, regular-season collegiate, Junior Gold qualifiers, USA Bowling Regionals, USBC Senior Championships, Youth Scratch Championships, Forty Frame Game, Survivor Tournament |
Tier 1: Banned outright, no matter the hardness
At these events, leave the urethane home. It does not matter if it is a brand-new 80D block. This category is not allowed, period:
- U.S. Open
- USBC Masters
- PWBA Tour, which includes the U.S. Women’s Open, the USBC Queens, and all PWBA Regional events
- U22 Masters and Queens
- USBC Collegiate Sectionals
- USBC Intercollegiate Team and Singles Championships (Nationals)
- USA Bowling National Championships
This is the group that made headlines. The majors. If you were planning to throw a Purple Hammer at the Masters or a soft piece at the Queens, that plan is done. Everyone in the field is on reactive or on a legal alternative.
Notice the Queens sits here because it runs under the PWBA Tour banner. Same with the U.S. Women’s Open. If it is a PWBA national event, urethane is out.
Tier 2: Allowed only if it is 78D or harder
These events still let you throw the category, but only if the ball measures 78D hardness or greater. Soft urethane and any pre-August 2022 ball are out. A hard, recently made piece is fine:
- USBC Open Championships
- USBC Women’s Championships
- Bowlers Journal Championships
- USBC Senior Masters
- USBC Super Senior Classic
- USBC Senior Queens
- Youth Open Championships
This is where most regular USBC members actually compete. If you make your annual trip to Open Championships and you like having a control piece for the fresh, you can still bring it. Just make sure it clears the 78D bar and was made after August 1, 2022.
Here is the catch worth repeating. USBC is now running hardness spot-checks at national tournaments. They are collecting data and watching for tampering. So “close enough” is not a strategy. Know your number before you show up.
Tier 3: Junior Gold, the split rule
Junior Gold gets its own lane, and it is the trickiest one to remember.
During qualifying, a 78D or harder ball in this category is allowed. So a kid can start the week with a hard control piece in the bag.
But once match play starts, all the way through the finals, no slow oil-absorbing high-performance balls are allowed at all. Not even at 78D. When the champion is on the line, everyone is on reactive.
USBC built it this way on purpose. They wanted youth bowlers to keep some equipment freedom early, then compete on equal footing when it counts. If your junior bowler is chasing Junior Gold, drill that rule into them now. You do not want to find out at the front desk on match-play morning.
What did NOT change
Plenty of events kept their rules exactly as they were. Urethane status at these is business as usual for 2026:
- Team USA Trials
- Regular season USBC Collegiate events
- Junior Gold qualifiers (the local qualifying step)
- USA Bowling Regionals
- USBC Senior Championships
- USBC Youth Scratch Championships
- The Forty Frame Game
- Survivor Tournament
If your calendar is built around these, nothing about your bag has to change.
What this actually means for your league night
Here is the part a lot of coverage skips. This is a national tournament rule. It is not a blanket ban on urethane in bowling.
Certified leagues and local tournaments can still choose to allow sub-78D urethane if they want to. The softer balls stay on the USBC approved list for that reason. They are just limited at the national level.
So on a normal Tuesday night in your house league, your urethane is very likely still legal. Check with your league officers if you want to be sure, because a league can set its own tighter rule. But nothing in this change forces your house league to boot your urethane.
The takeaway: the ban you keep hearing about lives at the top of the sport. Your weekly game is mostly untouched.
So is my Purple Hammer actually legal?
Run it through three quick questions:
- Was it made before August 1, 2022? If yes, it is out at every national event. Full stop. It can still see league use if your league allows it.
- Does it measure under 78D? If yes, it is out at Tier 1 and Tier 2 national events, and out at Junior Gold match play.
- Are you bowling league or a local event, not a USBC national? Then it is very likely fine, unless your league says otherwise.
Most classic Purple Hammers people are worried about fall under that softer, older description. For the majors, assume it is done. For league, assume it lives, but confirm.
What to roll instead if you are locked out
If your favorite control piece just got benched, you have real options that stay legal where urethane cannot go.
Weak, clean reactive balls can give you a lot of that same smooth, early, predictable shape without tripping the rule. Pearl reactive on a dull-ish surface, or a low-end symmetric ball, can cover a lot of the same looks.
There is also a newer category built exactly for this moment. Brands are shipping what some call NU, short for “not urethane.” These use a reactive-based cover tuned to fake a urethane shape while staying legal everywhere urethane is banned. They flare a bit more than true urethane, so you keep a little more back-end life.
Not sure what fits your rev rate and your home pattern? That is what we are here for. You can grab gear and get honest fitting help through our pro shop, and we will steer you toward a legal piece that matches your game instead of just selling you the shiniest box.
FAQ
Is urethane banned in 2026?
Only at specific USBC national events, and even then the rule varies. It is banned outright at events like the U.S. Open, Masters, and Queens. It is allowed at 78D hardness at events like Open Championships. And it is mostly still legal in your local league unless your league says otherwise.
Which tournaments ban urethane completely in 2026?
The U.S. Open, USBC Masters, the full PWBA Tour including the U.S. Women’s Open and USBC Queens, U22 Masters and Queens, USBC Collegiate Sectionals, Intercollegiate Team and Singles Nationals, and USA Bowling National Championships. No urethane allowed regardless of hardness.
Can I still use urethane at USBC Open Championships?
Yes, if it measures 78D hardness or harder and was made on or after August 1, 2022. Softer or older balls in this category are not allowed.
Is urethane banned at Junior Gold?
Partly. A 78D or harder ball is allowed during qualifying. From match play through the finals, no slow oil-absorbing high-performance balls are allowed at all.
When did the ban start?
The tournament restrictions took effect January 1, 2026. The approval-for-sale change for softer balls took effect December 31, 2025.
Can my league still allow urethane?
Yes. Certified leagues and local tournaments can choose to allow sub-78D urethane. This is a national tournament rule, not a full ban. Always confirm with your own league.
What does 78D hardness mean?
The D is the Shore D durometer scale, a standard way to measure how hard a material is. A 78D reading means the coverstock meets USBC’s firmness floor, which helps them keep equipment consistent and spot tampering.
The rule behind every ban on this list traces back to the official USBC announcement of new national tournament rules for slow oil-absorbing balls.
10th Frame Final Thoughts
The urethane story is not “banned everywhere.” It is “banned in specific places, capped in others, and mostly fine at your house.”
If you compete at the national level, learn your tier before every event and know your ball’s hardness and build date. If you are a league bowler, you probably have nothing to change tonight.
Either way, do not let a rule sheet catch you at the counter. Check the list, check your gear, and go down swinging with something that is actually legal on the floor.
