# Hammer Purple Pearl Urethane 78D

> Bowling ball — data from CarryDown (https://www.carrydown.com/balls/hammer-purple-pearl-urethane-78d/)

- Brand: Hammer
- Availability: current
- Released/approved: 2026-03-19
- Coverstock: Urethane Pearl 78D (urethane)
- Core: Super LED
- Intended condition: Light / dry lanes
- Factory finish: 500 Siaair Micro Pad
- USBC approved: yes (2026-03-10)
- USBC national tournament ineligible (no slow oil)

## Specs by weight

| Weight | RG | Differential | Int. Diff | Mass Bias |
|---|---|---|---|---|
| 16 lb | 2.583 | 0.034 | — | — |
| 15 lb | 2.632 | 0.034 | — | — |
| 14 lb | 2.634 | 0.034 | — | — |
| 13 lb | 2.601 | 0.04 | — | — |
| 12 lb | 2.624 | 0.04 | — | — |

## Description

The Legend, Now Harder Hitting!
Introducing the Purple Pearl Urethane 78D. Built around the all-new Super LED core, this design more than doubles the differential and flare potential while maintaining Hammer’s proven thick-shell technology. The result is a reaction closer than ever to the infamous Purple Pearl Urethane—now delivered in a harder 78D formulation.

## Where to buy

- Amazon (16 lb): https://www.amazon.com/Hammer-Purple-Urethane-Bowling-Pounds/dp/B0GRJLL4DQ?dib=eyJ2IjoiMSJ9.egH38jce5R13N3LvEl_waB-gMwkFK7PUZEuZFnut3df-9e3vcZhS-muJ3Iyhm6CSoQ3W7qXOEW0gQzglKi69sFR1R08nz4CpT1lWQb2bjV0WpCaBBpBtko8gg6rDc5vmWZo6fYbeDSb8Bh7C9tdaHZajspAME_vu-hVd4UK04GxThX48jLlrQJGN6ZMouW52Sit05e9SaSbkHcZeLUbjbrs6c2MT0MSamKebsOBEe6iWxU2Q_lT2IVW7-aSVsv7qm_51khJ9PjNsEPB-_3kbtFetMj_9mG7kGmUP3MUtiL0.VWwiyabHc43G9MHy1QdrfV6CCrEWCqFFaxccF9Thtb0&dib_tag=se&keywords=Hammer%2BPurple%2BPearl%2BUrethane%2B78D%2Bbowling%2Bball&qid=1780865892&sr=8-1&th=1&linkCode=ll2&tag=carrydownapp-20&linkId=ade5885b4a6392152bb7a443bee01367&language=en_US&ref_=as_li_ss_tl
- Amazon (15 lb): https://www.amazon.com/Hammer-Purple-Urethane-Bowling-Pounds/dp/B0GRJHFMRR?dib=eyJ2IjoiMSJ9.egH38jce5R13N3LvEl_waB-gMwkFK7PUZEuZFnut3df-9e3vcZhS-muJ3Iyhm6CSoQ3W7qXOEW0gQzglKi69sFR1R08nz4CpT1lWQb2bjV0WpCaBBpBtko8gg6rDc5vmWZo6fYbeDSb8Bh7C9tdaHZajspAME_vu-hVd4UK04GxThX48jLlrQJGN6ZMouW52Sit05e9SaSbkHcZeLUbjbrs6c2MT0MSamKebsOBEe6iWxU2Q_lT2IVW7-aSVsv7qm_51khJ9PjNsEPB-_3kbtFetMj_9mG7kGmUP3MUtiL0.VWwiyabHc43G9MHy1QdrfV6CCrEWCqFFaxccF9Thtb0&dib_tag=se&keywords=Hammer%2BPurple%2BPearl%2BUrethane%2B78D%2Bbowling%2Bball&qid=1780865892&sr=8-1&th=1&linkCode=ll2&tag=carrydownapp-20&linkId=380eb58c2079f88411e05770190035f4&language=en_US&ref_=as_li_ss_tl
- Amazon (14 lb): https://www.amazon.com/Hammer-Purple-Urethane-Bowling-Pounds/dp/B0GRJKBPZS?dib=eyJ2IjoiMSJ9.egH38jce5R13N3LvEl_waB-gMwkFK7PUZEuZFnut3df-9e3vcZhS-muJ3Iyhm6CSoQ3W7qXOEW0gQzglKi69sFR1R08nz4CpT1lWQb2bjV0WpCaBBpBtko8gg6rDc5vmWZo6fYbeDSb8Bh7C9tdaHZajspAME_vu-hVd4UK04GxThX48jLlrQJGN6ZMouW52Sit05e9SaSbkHcZeLUbjbrs6c2MT0MSamKebsOBEe6iWxU2Q_lT2IVW7-aSVsv7qm_51khJ9PjNsEPB-_3kbtFetMj_9mG7kGmUP3MUtiL0.VWwiyabHc43G9MHy1QdrfV6CCrEWCqFFaxccF9Thtb0&dib_tag=se&keywords=Hammer%2BPurple%2BPearl%2BUrethane%2B78D%2Bbowling%2Bball&qid=1780865892&sr=8-1&th=1&linkCode=ll2&tag=carrydownapp-20&linkId=d36cd3d8fe0aaad3def6b5af8820c628&language=en_US&ref_=as_li_ss_tl
- Amazon (13 lb): https://www.amazon.com/Hammer-Purple-Urethane-Bowling-Pounds/dp/B0GRJH2TWZ?dib=eyJ2IjoiMSJ9.egH38jce5R13N3LvEl_waB-gMwkFK7PUZEuZFnut3df-9e3vcZhS-muJ3Iyhm6CSoQ3W7qXOEW0gQzglKi69sFR1R08nz4CpT1lWQb2bjV0WpCaBBpBtko8gg6rDc5vmWZo6fYbeDSb8Bh7C9tdaHZajspAME_vu-hVd4UK04GxThX48jLlrQJGN6ZMouW52Sit05e9SaSbkHcZeLUbjbrs6c2MT0MSamKebsOBEe6iWxU2Q_lT2IVW7-aSVsv7qm_51khJ9PjNsEPB-_3kbtFetMj_9mG7kGmUP3MUtiL0.VWwiyabHc43G9MHy1QdrfV6CCrEWCqFFaxccF9Thtb0&dib_tag=se&keywords=Hammer%2BPurple%2BPearl%2BUrethane%2B78D%2Bbowling%2Bball&qid=1780865892&sr=8-1&th=1&linkCode=ll2&tag=carrydownapp-20&linkId=96a4fdc81590f38f05602f7ab0ca7237&language=en_US&ref_=as_li_ss_tl
- Amazon (12 lb): https://www.amazon.com/Hammer-Purple-Urethane-Bowling-Pounds/dp/B0GRJCBBKQ?dib=eyJ2IjoiMSJ9.egH38jce5R13N3LvEl_waB-gMwkFK7PUZEuZFnut3df-9e3vcZhS-muJ3Iyhm6CSoQ3W7qXOEW0gQzglKi69sFR1R08nz4CpT1lWQb2bjV0WpCaBBpBtko8gg6rDc5vmWZo6fYbeDSb8Bh7C9tdaHZajspAME_vu-hVd4UK04GxThX48jLlrQJGN6ZMouW52Sit05e9SaSbkHcZeLUbjbrs6c2MT0MSamKebsOBEe6iWxU2Q_lT2IVW7-aSVsv7qm_51khJ9PjNsEPB-_3kbtFetMj_9mG7kGmUP3MUtiL0.VWwiyabHc43G9MHy1QdrfV6CCrEWCqFFaxccF9Thtb0&dib_tag=se&keywords=Hammer%2BPurple%2BPearl%2BUrethane%2B78D%2Bbowling%2Bball&qid=1780865892&sr=8-1&th=1&linkCode=ll2&tag=carrydownapp-20&linkId=465f24e164293a64dce370ab1ba5c4b8&language=en_US&ref_=as_li_ss_tl