2026 Louisville Slugger Kryo (-8) Fastpitch Softball Bat: WBL4137010 (

Name: 2026 Louisville Slugger Kryo (-8) Fastpitch Softball Bat: WBL4137010 (DEMO)
Brand: Louisville Slugger
SKU: WBL41370102533D
Price: 449.95 USD
Availability: InStock

Find the bat to fit your swing! While we do not have cages on the premises we do offer a "Try to Buy" Demo Program. Bats are expensive and we want to make sure you get the right one! We have Baseball and Fastpitch Softball bats available to try. Our Demo Program is designed to help players find their favorite bat before buying one from us. We have specific demo bats that you try and then you buy a brand new bat with a warranty!

DEMO BATS are available IN STORE ONLY

Contact Us to See if the Bat & Size you're looking for is available that day! Please Call us at 810-629-0718 for the fastest response.

SHOP THE NEW IN WRAPPER VERSION

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2026 Louisville Slugger Kryo (-8) Fastpitch Softball Bat

Crafted for the peak performance and durability the game’s strongest players need, this bat checks all the boxes power hitters are looking for.

Change the game with one swing. The Louisville Slugger Kryo (-8) Fastpitch Bat combines impressive feel and sound with maximum durability and performance to help the game’s strongest batters do damage every time they step to the plate. Channeling the power and beauty of water in a teal and white design, Kryo is centered around the GO-EX1 Barrel System, a composite gapped wall design and internal disc system, that works with the XPND End Cap to deliver unmatched feel, performance and sound. Kryo (-8) delivers power in an eye-catching design that brings power and beauty to the heart of the order.

GO-EX1 Barrel System: Incredible performance, feel and sound on every swing thanks to a high-performance gapped wall design working in collaboration with a bullet-proof internal disc system
VTX Connection System: Allows for independent movement between the barrel and handle for a best-in-class feel with less vibration on contact.
Patented XPND End Cap: Innovative patented design that creates a pivot for the barrel to float on, improving performance and feel toward the end of the barrel
Balanced Swing Weight: An easy-swinging, balanced feel through the zone, helping all types of players deliver maximum pop.
Premium LS Pro Comfort Grip: Applied to the handle for the added tack and cushion players love, improving comfort and bat control.

KRYO FP (-8) 2026 2634	WBL41370102634
KRYO FP (-8) 2026 2533	WBL41370102533

We recommend starting with a length based on a player's height and weight as seen below. These charts simply serve as a starting point. As far as the best weight, it will vary from player to player depending on one's personal preference, age, hitting style, bat speed, and strength. Typically we recommend the longest and heaviest bat that you can swing without losing bat speed or affecting your swing. The FEEL of the bat will be the most important factor. You have to make sure it feels right to you. The more you like it the more confident you will be at the plate!

HELP DECIDING BETWEEN TWO SIZES

Longer/Heavier Bat: Will be better for players that are growing but can cause a dip in their swing. Also it moves the sweetspot of the bat further away from the player which can cause more miss hits. For a growing or younger player that can handle the heavier bat without issue compared to the lighter, it is best to go with the longer/heavier bat.
Shorter/Lighter Bat: Will give far more control of the bat, and keep the sweetspot closer to the player. They can always adjust in batter's box. The down side for growing players is you might have to buy more bats over time. Tony Gwynn, one of the greatest batters in MLB history and a grown man who weighed well over 200lbs, used a 32 ½ inch bat the majority of his career. It is not always better to just keep sizing up.

Most Popular Length by Age

AGE	5 to 7	8 to 9	10	11 to 12	13 to 14	15 to 16	17 & Up
LENGTH	24-26"	26-28"	28-29"	30-31"	31-32"	32-33"	33-34"

Bat Sizing Chart

WEIGHT (Pounds)	HEIGHT (Inches)
WEIGHT (Pounds)	36-40"	41-44"	45-48"	49-52"	53-56"	57-60"	61-64"	65-68"	69-72"	73"+
Under 60	26"	27"	28"	29"	29"
61-70	27"	27"	28"	29"	30"	30"
71-80		28"	28"	29"	30"	30"	31"
81-90		28"	29"	29"	30"	30"	31"	32"
91-100		28"	29"	30"	30"	31"	31"	32"
101-110		29"	29"	30"	30"	31"	31"	32"
111-120		29"	29"	30"	30"	31"	31"	32"
121-130		29"	30"	30"	30"	31"	32"	32"	32"
131-140		29"	30"	30"	31"	31"	32"	32"	32"
141-150			30"	30"	31"	31"	32"	33"	33"
151-160			30"	31"	31"	32"	32"	33"	33"	33"
161-170				31"	31"	32"	32"	33"	33"	33"
171-180						32"	33"	33"	33"	33"
181 & More							33"	33"	33"	34"

If you need some help please Contact Us or come into the store and we will size you for a bat. While bats can have the same measurements they often feel different and it's beneficial to take some swings with them at the store.

If you are local, check out our Diamond Demo Program to find a bat to fit your swing!

IMPORTANT BASEBALL BAT RULES

Baseball unlike Fastpitch Softball has certain Drop (Length-to-Weight Ratio) requirements per age group. It is important to keep track of these as there is a certain point over 4 years where you have to have a different drop each year. If you can swing the heavier earlier without hurting your swing it can be beneficial.

12 & Under (12u): Any Drop
13 & Under (13u): Must be a DROP 8 or Heavier
14 & Under (14u): Must be a DROP 5 or Heavier
15 & Under (15u): Must be a BBCOR (Drop 3)
High School (Regardless of Age): Must be a BBCOR (Drop 3)

LENGTH-to-WEIGHT RATIO

The ''DROP'' as some may call it, or the number with the MINUS in front of it is the LENGTH-to-WEIGHT ratio. This defines the difference between the length of the bat in inches and the weight of the bat in ounces. The larger the number, the lighter the bat.

Try to Buy

Diamond Demo Program

Find the bat to fit your swing! While we do not have cages on the premises we do offer a "Try to Buy" Demo Program. Bats are expensive and we want to make sure you get the right one! We have Baseball and Fastpitch Softball bats available to try. Our Demo Program is designed to help players find their favorite bat before buying one from us. We have specific demo bats that you try and then you buy a brand new bat with a warranty! All Demos are Available In Store Only.

We have 2 Ways to Try Bats at Diamond Sport Gear!

PAID: Checkout bats for 4 Days
FREE: Try them on Site (Weather Permitting)

DEMO FAQs

We have multiple new models from most manufacturers we sell. Unfortunately they limit how many we can get so we do not have every bat in every size. Contact us or come in to see what is available. We have Demos available from the following brands:

Louisville Slugger
DeMarini
Marucci
Easton
Rawlings
Axe Bat
Mizuno
Warstic
Dudley
Victus
Stinger

Come in and select up to two (2) bats from what we have available to demo. It costs $40 per bat and you can have them for up to four (4) days. At the time of demo we will place a Diamond Demo Credit(s) on your receipt. Do not lose them! You will have 30 days from your rental date to use them on your bat purchase. Each time you try a bat you get credits worth $30 OFF your Bat Purchase and must be presented at the time of purchase. When you are checking them out we get a copy of your drivers license and take an imprint of a credit card in case you don't return the bats. If you BUY a bat it still only costs you $10 to try one!

Bring your own Net to hit into and Balls to try as many bats as you'd like! Weather permitting of course. We have a grass area in our plaza that we allow people to set up and try bats. We hold a Credit Card & Drivers License in store while you try. Doing this method allows you to try as many different bats as we have available that day! We do NOT charge for those that want to try our bats on site.

PAID CHECKOUT: It is $40 per bat

FREE TRIAL: Free to try on site

PAID CHECKOUT: Up to Two (2) Bats

FREE TRIAL: Try as many bats as you'd like on site that we have available

PAID CHECKOUT: Four (4) Days

FREE TRIAL: Anytime during our business hours. We ask that you try to be done 30 minutes before we close.

Yes, but we will only hold bats for the day. Call the morning you are coming and we can have bats waiting for you when you get here! We will NOT hold bats multiple days as it is a widely used program.

Any of our bats, even new in wrapper can be taken outside to dry swing! You can at least get a feel for the bat before purchase or demoing a size close to what you'd like!

You or someone with you must be 18 years or older, with a valid ID to Demo any Bat(s).

Yes! Bring in your receipt with your Diamond Demo Credit(s) at the time of purchase. You will get a discount for every credit you have.

The Diamond Demo Credit is a sticker that will be placed on the back of your receipt for each bat that you demo. You MUST present them at the time of bat purchase or NO discount will be given.

Credits can only be used on In Store Purchases.

Yes. Due to the popularity of the program we have to have them back after a strict 4 days so others can try them.Failure to return demo bat(s) in 4 days will result in a $20 per day late fee & 1 Rental Strike. $20 will be charged per day for up to 6 days, resulting in a total of 10 days that you have the bat(s). After the 10th day your credit card will be charged the accumulated late fees plus the FULL MSRP price of the bat(s).

Each time you go past the 4 days you are given a Rental Strike. Once you accumulate 3 strikes you can no longer use our demo program.

2026 Louisville Slugger Kryo (-8) Fastpitch Softball Bat

Change the game with one swing. The Louisville Slugger Kryo (-8) Fastpitch Bat combines impressive feel and sound with maximum durability and performance to help the game’s strongest batters do damage every time they step to the plate. Channeling the power and beauty of water in a teal and white design, Kryo is centered around the GO-EX1 Barrel System, a composite gapped wall design and internal disc system, that works with the XPND End Cap to deliver unmatched feel, performance and sound. Kryo (-8) delivers power in an eye-catching design that brings power and beauty to the heart of the order.

GO-EX1 Barrel System

Incredible performance, feel and sound on every swing thanks to a high-performance gapped wall design working in collaboration with a bullet-proof internal disc system

VTX Connection System

The two-piece design featuring the VTX Connection System, designed to work with the GO-EX1 Barrel System for elite energy transfer and consistent feel. Allowing for independent movement between the barrel and handle for a best-in-class feel with less vibration on contact.

XPND Performance End Cap

Innovative patented design that creates a pivot for the barrel to float on, improving performance and feel toward the end of the barrel.

2026 Louisville Slugger Kryo (-8) Fastpitch Softball Bat: WBL4137010 (DEMO)

DEMO BATS are available IN STORE ONLY

SHOP THE NEW IN WRAPPER VERSION

2026 Louisville Slugger Kryo (-8) Fastpitch Softball Bat

HELP DECIDING BETWEEN TWO SIZES

Most Popular Length by Age

Bat Sizing Chart

IMPORTANT BASEBALL BAT RULES

LENGTH-to-WEIGHT RATIO

Diamond Demo Program

DEMO FAQs

2026 Louisville Slugger Kryo (-8) Fastpitch Softball Bat

GO-EX1 Barrel System

VTX Connection System

XPND Performance End Cap

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