Renthal Fatbar 1-1/8" Handlebars
MSRP: $119.95
$95.96
Exact Fitment Guarantee
The Renthal Fatbar 1-1/8-inch Handlebar is an unbraced, profile-tapered motocross and enduro handlebar engineered to replace rigid crossbar assemblies and fragile 7/8-inch standard bars. Designed without a welded or clamped crossbar, the Fatbar relies on a computer-profiled wall thickness that tapers from 1-1/8 inches (28.6mm) at the central clamping area down to 7/8 inches (22.2mm) at the control ends. This tapered geometry allows the handlebar to flex elastically under vertical shock loads while maintaining torsional stiffness across steering inputs.
Manufactured from exclusive 7010-T6 aerospace aluminum alloy, the Fatbar undergoes shot-peening surface treatment to dramatically increase fatigue life and resist surface notch sensitivity caused by gravel and debris impact. The bar is finished with a 15-step hard anodizing process that protects against corrosion and minimizes clamp wear. On the track or trail, riders experience a significant reduction in forearm fatigue and palm bruising on high-speed braking bumps, chop, and jump over-shoots. The natural flex profile absorbs chatter that would otherwise transmit directly into the rider's wrists and shoulders, allowing longer motos and improved line accuracy through rough chop.
- Clamping Diameter: 1-1/8" (28.6mm) unbraced taper design
- Control End Diameter: Standard 7/8" (22.2mm)
- Material: Proprietary 7010-T6 aerospace-grade aluminum alloy
- Wall Thickness: Computer-tapered 5.0mm base to 4.0mm tip profile
- Included Accessories: High-density molded Renthal foam bar pad
### Step-by-Step Installation & Safety Protocols Fitting a Renthal Fatbar requires 1-1/8-inch bar clamps. Before installation, remove the existing hand grips, throttle housing, front brake master cylinder, and clutch perch assembly. Clean the lower clamp surfaces thoroughly of any grit or burrs. Center the Fatbar within the lower clamps, utilizing the laser-etched alignment grid to set the bar sweep to your preferred riding stance. Reinstall the upper clamp caps and tighten the pinch bolts progressively, ensuring an even gap between the front and rear of the clamps unless your bike manufacturer specifies a zero-gap front clamp design. Tighten to OEM torque specifications (generally 20 to 26 Nm). Reinstall controls, making sure not to over-tighten perch bolts (recommended 5-8 Nm) so they can rotate upon impact rather than snapping.
### Maintenance & Inspection Protocol Maintenance for the Fatbar includes inspecting the bar for bending, scratches deeper than surface anodizing, or pinch damage from over-torqued clamps after any major spill. Clean using mild detergent and water; avoid aggressive acid-based aluminum cleaners. Replace immediately if the bar sustains visible deformation.
Frequently Asked Questions
Q: Why choose an unbraced Fatbar over a crossbraced handlebar?
A: Unbraced tapered bars offer greater vertical flex and compliance than crossbraced bars, resulting in reduced rider fatigue over long motos and rocky off-road terrain, while still delivering superior strength compared to standard 7/8-inch bars.
Q: Will my stock controls, throttle tube, and grips fit the Renthal Fatbar?
A: Yes. The Fatbar tapers down to standard 7/8-inch (22.2mm) diameter at both ends, allowing all OEM throttle assemblies, switchgear, hand controls, and standard 7/8-inch grips to bolt on without modification.
Q: What torque should I use on the handlebar clamp bolts?
A: Always refer to your motorcycle's factory service manual, but typical torque values for 1-1/8-inch bar clamps range from 20 to 25 Nm (15 to 18 ft-lbs). Tighten bolts evenly in an alternating X-pattern to maintain uniform clamping pressure.
Q: How does shot-peening improve handlebar longevity?
A: Shot-peening bombards the alloy surface with microscopic spherical media, creating beneficial residual compressive surface stress that prevents surface micro-fissures from propagating into structural fatigue cracks.