TPR Double Shear Hub Kit for Pro R & Turbo R
The TPR Race Prepped Double Shear Hub Kit is a patented hub upgrade designed to eliminate wheel stud failures and lug loosening issues on Polaris Pro R and Turbo R platforms.
Factory Polaris 5-lug unitized hubs use shallow stud engagement and are not hub-centric. This means vehicle weight and load forces are primarily supported by the wheel studs. On heavier, higher horsepower Pro R and Turbo R models running larger tires, this can lead to broken studs and loose lug nuts.
The factory hub provides approximately .350” of stud engagement. The TPR double shear hub kit doubles that to .700”, dramatically increasing load support and reducing dependency on excessive lug torque.
TPR’s patented double shear ring is a 2-piece design that installs behind the hub flange and locks into the machined outer area of the hub for maximum strength and support.
Recommended wheel torque with this system is 120 ft lbs, reducing stress on tapered lug seats compared to the factory 148 ft lbs spec.
Kit Includes
- Double shear rings
- Custom ARP wheel studs (1/2" or 12mm option)
- (6) Lug nuts
- Optional brand new hub fully assembled with kit installed
Installation Notes
- No modifications required to the hub
- Press out stock studs
- Install double shear rings
- Press in new ARP studs
For unassembled kits, we highly recommend adding TPR026 Install Kit, which includes:
- Locating pins
- Press sleeve
- Stepped reamer for brake rotors and wheels (for 1/2" studs)
If purchasing fully assembled hubs with 1/2" studs, only the stepped reamer (TPR026) is required for rotor and wheel holes.
Reamer is not required for 12mm studs.
Features
- Patented TPR double shear ring design
- Doubles stud engagement from .350” to .700”
- ARP 1/2" or 12mm wheel stud options
- Reduces lug loosening and stud failure
- No hub modification required
- Recommended torque: 120 ft lbs
- Manufactured completely in-house
- Race proven in major desert and short course events
Fitment
Fits Polaris models:
- Polaris Pro R
- Polaris Turbo R
Tested & Proven
Extensively tested in 2024 race season events including:
- Baja 1000
- Baja 500
- Baja 400
- San Felipe 250
- Mint 400
- King of the Hammers
- Vegas to Reno
- Laughlin Desert Challenge
- California 300
- Crandon
- WORCS Series
Used by top teams and drivers including Polaris Factory Racing, Wayne Matlock, Kristen Matlock, Blake Wilkey, Ricky Johnson, and more.
Best For
- Race and desert applications
- High-horsepower Pro R builds
- Turbo R running large tires
- Preventing wheel stud breakage
- Improving hub load support
FAQs
Why do Pro R hubs have stud issues?
The factory design uses shallow stud engagement and is not hub-centric, placing excessive load on the wheel studs.
What does the double shear ring do?
It reinforces the hub flange and increases stud engagement, reducing stress and failure risk.
Do I need to modify the hub?
No. The hub itself does not require modification.
Do I need a reamer?
A stepped reamer is required for 1/2" studs to enlarge rotor and wheel holes. It is not needed for 12mm studs.
Is this race proven?
Yes. The kit has been tested and proven in major 2024 desert and short course racing events.
