REVS & READS ▸ ARSENAL CARD BUILDER ▸ READ · REACT · REPEAT ▸ BUILD YOUR BAG ▸
Step 1 · Your Game
How do you throw it?
Set your hand and release style. Everything on your card — ball order and the corner-pin reads — is tuned to how you actually roll it.
Your name
Prints on the card header.
Bowling hand
Release style
Not sure? Higher rev rate hooks earlier; more ball speed skids longer.
Roll type
How the ball rolls off your hand — backups flip the corner-pin reads to the other hand.
Fine-tune (optional)
Know your numbers? These sharpen the ball order. Leave blank to use the buttons above.
Cloud backup & sync
Optional and off by default. When on, your logged games are copied to your server so a lost phone can't lose your season — and your key restores them on any device. Your games stay on this phone either way; turn sync off or delete your cloud copy anytime.
Step 2 · The Bag
Your arsenal
Start typing a ball name and specs autofill. Order and tags are figured for you — then refine by feel on your card.
Step 3 · Read Card
Your card
Pick the pattern you're on — the ladder and reads flip to match. Reorder by feel below.
Oil pattern
Pick a pattern or set the length — the card targets your breakpoint (rule of 31).
Ladder direction
Log a game
Find your style
Five quick reads — answer for how your strike ball behaves.
Add a ball
Not in our catalog? Look up its factory specs in the ZVL bowling-ball database — it covers current and discontinued balls. And if you don’t know what surface is on it now, ask your local pro shop — they can check it (and freshen it up) in a couple of minutes.
What do core, strength & pin mean? ▾
Symmetric core — the weight block inside is even all the way around. Smooth, predictable, forgiving.
Asymmetric core — lopsided on purpose. Revs up harder and turns sharper down lane.
Strength — how much total hook the ball is built for. Strong wants fresh oil; Control shines when lanes are burned up. On the drilled ball you can see it in the pin: a stronger layout carries the red pin further out past your fingers (righty view — mirrored for lefties), Control tucks it in over the opposite side.
Pin up — the little colored pin dot sits above your finger holes. The ball saves its energy: more length, sharper backend.
Pin down — the pin sits below your fingers. The ball revs up sooner: earlier, smoother, more control.
Cover & grit, in one line: solid covers grip the oil, pearl covers glide longer; a lower grit number = rougher surface = reads the lane sooner. Want every spec for every ball ever made? The free ZVL database has the full spreadsheets.