Proformance Ultra Narrow Differentials
Fitting the CV joints inside the Ring Gear allows for much longer axles, more wheel travel and protection of the CV boot from damage caused by Rocks and Debris. Based on race proven technology, our Ultra Narrow Series Differentials are the Narrowest off Road Differentials in the world - period. Our CV joint faces are only 40mm apart - a world first.
Hollow Diff Centres
Off Road Racing, ULTRA 4 Racing, Rock Bouncing and many other forms of off Road Motorsport are seeing a lot more vehicles fitted with Independent Front (IFS) and/or Independent Rear Suspension (IRS).
Before now, the only option was to take an OEM Differential and cut it down in length and fit some CV joints where the axle tubes once were. Unfortunately most diffs use small bearings and after modification the CV faces are typically 14-15 inches (450mm) apart.
Off road racing is all about wheel travel and short axles prevent wheel travel - simple.
Finally, competitors all over the world have a cost effective, race proven alternative. our ultra narrow differentials have the CV joints fitted insid the ring gear, allowing for incredibly long axles, never before seen in Off Road Vehicles.
Download our Capability Statement - Click Here
Proformance U250 (DANA 60)
Based on our Race Proven 250mm prototype from 2008, the Ultra Narrow 250 uses a 9.75' (250mm) Ring Gear and 8.5" (215mm) Taper Roller Bearings to allow the CV joints to be mounted inside the Ring Gear Carrier
Proformance Ultra Narrow Diffs have the CV joints mounted up inside the Ring Gear Carrier, allowing for much longer Axles and much more wheel travel. Inboard Cv joints also provide protection of the CV boot from rocks and debris common if off road use.
The Proformance Ultra narrow "U250" Diff is available with a Spool (locked drive) U250S, Detroit Locker (U250L) and with or without Inboard Brakes (U250SB + U250LB) and accommodates 934 "Series 21" CV Joints with either 33 or 35 spline axles.
Shown in this photo is the U250 Spool
Specifications | Dimensions | 3D CAD Models
Download our Capability Statement - Click Here
Proformance U290 (DANA 80)
Based on our Race Proven U250mm Ultra Narrow Diff, the Ultra Narrow U290 uses a massive 11.25" (290mm) Ring Gear and massive 9.0" (230mm) Taper Roller Bearings to allow the use of Series 30 CV Joints
Proformance Ultra Narrow Diffs have the CV joints mounted up inside the Ring Gear Carrier, allowing for much longer Axles and much more wheel travel. Inboard Cv joints also provide protection of the CV boot from rocks and debris common if off road use.
The 290 is available with a Spool (locked drive), Detroit Locker, Inboard Brakes and accommodates the heavy duty "Series 30" CV Joints with 40 or 44 spline axles.
With inboard CV Joints, the CV mounting faces are only 40mm Apart.
Specifications | Dimensions | 3D CAD Models
Download our Capability Statement - Click Here
Truggy Rear IRS Diff - Ultra Narrow - Internal CV Joints - Proformance Motorsport
ULTRA NARROW IFS REAR DIFF - BITD - SCORE - BAJA PROFORMANCE MOTORSPORT
Masssive Bearings allow the CV Joints to be fitted inside the ring gear - allowing for longer axles and more wheel travel
Dana 80 Ultra Narrow Diff fitted to 2WD Front Engine Truggy - Sean Gilbert Racing - Proformance Motorsport USA
Dana 80 Billet Aluminium Case for IFS and IRS - Ultra Narrow by Proformance Motorsport
KOH - ULTRA 4 IFS IRS Ultra narrow DANA 80 Diff - Proformance Motorsport
Dana 80 IRS Case - Billet Aluminium - Sean Gilbert Racing USA - Proformance Motorsport
Billet 4340 Chrome Moly Carrier for DANA 80 Ultra Narrow IFS IRS Diff
Proformance Motorsport Ultra Narrow Differentials allow the CV Joints to be mounted up inside the Diff Gear, allowing for longer axles and Longer Wheel Travel
IRS IFS Ultra Narrow Diff for Off Road Racing and Ultra4 Motorsport and Military Applications
IFS and IRS Diffs manufactured by Proformance Australia. Inboard CV Joints allow for longer Axles
Ultra Narrow Diff with Inboard Brake Rotors and Calipers - off Road Racing, IFS IRS Trophy Trucks
Ultra Narrow Diff with High Pinion for Ultra4, Military and Trophy Trucks. Long Travel IFS, Internal CV Joints, Proformance Motorsport
Inboard Brakes - Proformance Motorsport, Wilwood Calipers, Ultra4, IFS IRS, Australia Score Trophy Trucks 4x4
Australian Manufactured, Proformance Motorsport Ultra Narrow Differential for 4X4 Trophy Truck or Military Applications
Proformance Ultra Narrow Diffs are Much Narrower than Currie - Strange - Spidertrax IFS IRS 10" 10 inch IFS IRS Differentials
Large DANA 80 IFS IRS DIFF manufactured by Proformance Motorsport Western Australia. Ultra Narrow Diff with Internal Series 30 CV Joints for ULTRA4 King of the Hammers Vehicles
Diff Designed for ULTRA4 and KOH Vehicles IFS IRS or BOTH. Off Road Racing IFS IRS DANA 60 or DANA 80 IFS IRS Gears
Ultra Narrow DANA80 IFS IRS Diff. Larger than 9 Inch or 10 Inch IRS IFS Diff.
ULTRA4, KING of Hammers, KOH IFS IRS Independent Front Suspension, Independent Rear Suspension, Ultra Narrow Differentials.
Ultra Narrow Differential for Off Road Racing and Military Applications. IFS IRS Differential Performance Applications
934 CV Joint mounted up inside the DANA 60 Ring in a Proformance Motorsport Ultra Narrow Diff. Suits Off Road Racing, IFS, IRS ULTRA4 ULTRA 4 KOH, BAJA.
Independent Front Suspension for off road racing, Ultra4. Ultra 4, KOH, BAJA. CV Joints are mounted inside the ring gear for longer axles and more wheel travel. Proformance Western Australia
