2021 Harley-Davidson FLTRXS Road Glide Special Parts & Accessories
Touring
Milwaukee-Eight Touring (2017-2023)
1,080 parts available
260 Performance
160 Maintenance
660 Accessories
2021 Harley-Davidson FLTRXS Road Glide Special
About the 2021 Harley-Davidson FLTRXS Road Glide Special
The 2021 Road Glide Special is a premium bagger featuring the frame-mounted sharknose fairing and the powerful Milwaukee-Eight 114 V-Twin engine. This model year is significant for transitioning from a hydraulic clutch back to a cable-actuated system and introducing a choice between chrome or blacked-out finishes. It sits above the standard Road Glide by offering upgraded infotainment, larger displacement, and stretched saddlebags as standard equipment.
What Makes This Trim Special
- Milwaukee-Eight 114 Engine — The Special comes standard with the 114ci engine, whereas the base Road Glide uses the 107ci.
- Boom! Box GTS Infotainment — Features a 6.5-inch full-color touchscreen with Apple CarPlay and Android Auto compatibility.
- Stretched Saddlebags — Factory-installed extended bags that wrap around the mufflers for a slammed look.
- Prodigy Wheels — Gloss Black or Chrome Prodigy cast aluminum wheels (19-inch front, 18-inch rear).
- Chopped Engine Guard — Low-profile crash bar that emphasizes the bike's lean, custom lines.
Likely but unverified:
- Reflex Defensive Rider Systems (RDRS) — Optional electronic suite including cornering ABS, traction control, and hill start assist.
Key Specifications
| Engine |
Milwaukee-Eight 114 V-Twin Produces 118 ft-lb of torque at 3,250 RPM |
| Displacement | 114 cu in (1,868 cc) |
| Fuel System | Electronic Sequential Port Fuel Injection (ESPFI) |
| Cooling | Air-cooled with oil cooler |
| Transmission |
6-Speed Cruise Drive Features a cable-actuated clutch, a change from the previous hydraulic system |
| Drivetrain | Chain primary, Belt final drive |
| Front Suspension | 49mm Dual Bending Valve (DBV) telescopic forks |
| Rear Suspension |
Premium Low Hand-Adjustable Rear Suspension Lowered 'Special' stance with 2.1 inches of travel |
| Front Brakes | 32 mm, 4-piston fixed Brembo with standard ABS |
| Rear Brakes | 32 mm, 4-piston fixed Brembo with standard ABS |
| Front Tire | 130/60B19 61H |
| Rear Tire | 180/55B18 80H |
| Weight | 853 lbs (running order) |
| Seat Height | 25.9 in (laden) |
| Fuel Capacity | 6 gal |
Ownership at a Glance
What to know about maintaining a 2021 Harley-Davidson FLTRXS Road Glide Special
Wear Items
Upgrades
- Stage 1 Performance
- Rear Shocks
- Handlebars
Replacements
- Clutch Cable Adjuster
- Compensator
Known Issues 3
Top reported problems from owners and mechanics
Medium
Plastic Clutch Adjuster Failure
The 2021-specific plastic inline cable adjuster can snap or lose tension, leading to a loss of clutch control.
Medium
Compensator Rattle
A recurring M8 platform issue where the compensator sprocket develops play, causing a rhythmic knocking sound from the primary.
Low
Engine Heat
The 114 engine generates significant heat, particularly on the right side near the exhaust, which can be uncomfortable in stop-and-go traffic.
Parts Most Owners Need
Performance Upgrades 260
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Moose Racing
All Balls Racing Fork Oil and Dust Seal Kits
$24.95 - $126.95
3 of 127 options fit
In Stock
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Maintenance Parts 160
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Moose Racing
All Balls Racing Wheel Bearing and Seal Kits
$24.95 - $84.95
4 of 197 options fit
In Stock
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Alloy Art
Alloy Art Mfg. Multi Rear Brake Caliper Mount
$797.95 - $850.95
4 of 4 options fit
In Stock
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Arlen Ness
Arlen Ness Big Sucker™ Stage I Air Filter Kits for M-Eight
$399.95 - $534.95
7 of 17 options fit
In Stock
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Accessories 660
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Arlen Ness
Arlen Ness Adjustable Driver and Passenger Floorboards
$624.95 - $889.95
2 of 6 options fit
In Stock
Frequently Asked Questions About the 2021 Harley-Davidson FLTRXS Road Glide Special
The 2021 model uses a cable-actuated clutch, marking a return from the hydraulic system used in 2014-2020 models.
The engine oil capacity with a filter change is 5.2 quarts (4.9 liters).
Yes, Reflex Linked Brembo Brakes with ABS are standard on the Special trim.
The Special features the larger 114 engine (vs 107), the Boom! Box GTS infotainment (vs 4.3), stretched saddlebags, and blacked-out or chrome finishes.
It uses a 12V, 28-30 Amp-hour battery, typically part number YTX30L-BS or 66010-97.
Adjustment is done via a red plastic clip on the cable under the front fairing and internally behind the derby cover.
Yes, the Boom! Box GTS system supports Apple CarPlay, though it typically requires a WHIM (Wireless Headset Interface Module) or a jumper plug to be active.
With a 6-gallon tank and an average of 43-45 mpg, the range is approximately 240-270 miles.
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