Choosing a 31.8 mm handlebar can boost control, comfort, and stance on trails. These 780 mm wide riser bars with various rise options suit riders from cross-country to downhill. Aluminum alloy 6061 options offer durability and vibration damping, while carbon alternatives provide lighter weights at a higher cost. This guide highlights five top 31.8 handlebars available on Amazon, summarizing key specs, ergonomics, and ride characteristics. Read on to compare geometry, material, and compatibility so you can pick a bar that aligns with your riding style and bike setup.
| Product | Brand | Clamp | Width & Rise |
|---|---|---|---|
| GEWAGE 31.8 Riser Handlebar (780mm) | GEWAGE | 31.8mm | 780mm width; rises 25/55/70/90/120mm |
| FIFTY-FIFTY 31.8 Riser Handlebar | FIFTY-FIFTY | 31.8mm | 780mm width; rise 35mm |
| WAKE 31.8 MTB Handlebar (720/780mm) | WAKE | 31.8mm | 720/780mm width; rise varies by model |
| PNW Gen 4 Range 31.8 Handlebar | PNW Components | 31.8mm | About 50mm rise |
| RXL SL Carbon 31.8 Handlebar | RXL SL | 31.8mm | 720/740/760mm widths |
GEWAGE 31.8 Riser Handlebar, 780mm Wide
GEWAGE’s 31.8 handlebar delivers a broad 780 mm width with a 31.8 mm clamp diameter and multiple rise options: 25, 55, 70, 90, and 120 mm. The bar is forged from 6061 aluminum alloy, offering durability and a non-slip surface with a feel that closely resembles carbon for chatter damping while remaining affordable. Its modern geometry includes 12 degrees of rearward sweep, which helps align the shoulders into a more neutral position and reduces wrist fatigue during long climbs and rough descents. The ergonomic design is tailored for comfort on extended rides and is compatible with most mountain and dirt bikes, making it a versatile choice for all-mountain adventures.
ergonomics are a central focus, with a design that aims to relax the rider’s grip and wrists without sacrificing stiffness. On the trail, the 780 mm width yields increased stability on steep or uneven terrain, providing a planted feel in rapid cornering and when absorbing front-end chatter. Installers should ensure adequate cockpit clearance on smaller frames and re-check stem spacers to maintain a comfortable cockpit. While heavier than carbon bars, aluminum offers excellent durability for riders who frequently ride in rocky environments or ride with aggressive setups. This GEWAGE model is well-suited for riders who prioritize reliable performance across varied terrain.
FIFTY-FIFTY Mountain Bike Riser Handlebar, 780mm Wide
FIFTY-FIFTY’s riser bar is built from high-grade 6061 aluminum alloy with double-butted walls, hard anodizing, and precision CNC bending. The 780 mm width is paired with a 35 mm rise, delivering a confident, open riding position suited to all-mountain and long-travel setups. At approximately 340 g, the bar remains relatively light for an aluminum model, balancing stiffness with weight for improved control on exposed ridgelines and technical sections. The combination of durability and a wide stance helps riders manage aggressive lines, yet remain predictable when negotiating loose gravel or damp roots.
The bar’s geometry and finish support confident steering and rapid response without excessive flex. For riders upgrading from narrower bars, the wider width opens up the cockpit, improving leverage on climbs and descents. The 31.8 mm clamp diameter remains widely compatible with many stems, allowing straightforward installation on most mountain bikes. Those seeking a sturdy, affordable option for enduro-style riding will appreciate the wide platform and solid grip that FIFTY-FIFTY delivers, especially when paired with reliable grips and saddles for extended sessions on rough terrain.
WAKE 31.8Mm MTB Mountain Bike Handlebar, 720/780mm
WAKE’s 31.8 mm handlebar is designed for riders demanding extra length and control. Made from high-strength aluminum alloy (6061), the bar is offered in 720 and 780 mm lengths, providing a balance between maneuverability and stability on technical terrain. The platform emphasizes lightness—estimated around 330 g for 720 mm and 360 g for 780 mm—while maintaining a rigid, non-slip surface. Ergonomic design and CNC-precision bending emphasize comfort for long climbs and fast descents. This model is well-suited for riders who value responsive handling on downhill trails and rough off-road conditions.
With a slightly forward-leaning posture supported by the 91°C style geometry typical of WAKE designs, riders can maintain strong control without sacrificing wrist comfort. The bar’s wider options help smooth power transfer during aggressive riding and improve tire contact with the ground on rough surfaces. When installing, ensure your cockpit geometry aligns with your preferred riding position, particularly on shorter frames where head-tangle clearance might be tight. This WAKE bar provides a solid, dependable platform for riders seeking extra leverage and better control on demanding trails.
PNW Gen 4 Range Alloy Mountain Bike Handlebar
The PNW Gen 4 Range alloy handlebar is crafted from 2014 aluminum alloy, designed for strength and reliability at a 31.8 mm clamp. It features a practical 50 mm rise and a 70 mm stem clamp width for secure mounting and broad compatibility with a wide range of frames and forks. The ergonomic geometry blends a 10-degree backsweep with 5-degree upsweep to position wrists in a natural, relaxed posture during climbs and descents. This combination supports comfortable long rides and precise control when crawling over rooty sections or negotiating tight switchbacks on the trail.
PNW emphasizes a resilient ride through a balance of stiffness and dampening, helping riders maintain control on steep or loose terrain. This bar suits riders who want a robust, all-around option that can handle aggressive lines without feeling overly twitchy. If you’re building or updating an all-terrain or enduro setup, the Gen 4 Range is a dependable choice that pairs well with a large selection of 31.8 stems and grips, ensuring you stay in command on challenging trails.
RXL SL Carbon 31.8 Mountain Bike Handlebar
RXL SL’s carbon fiber handlebars offer a lightweight alternative with a 31.8 mm diameter and widths ranging from 720 to 760 mm, depending on the exact model. Carbon fiber provides excellent stiffness and vibration damping, delivering a firm, responsive feel without excessive flex. The bar supports an upright riding posture, helping to reduce stress on the back, arms, and neck while maintaining strong steering control on variable terrain. The carbon construction also contributes to a cleaner braking and gear routing experience, with the added benefit of a sleek aesthetic that complements high-end builds.
Designed for riders prioritizing weight savings and a direct feel, this carbon bar is well-suited for cross-country racers and trail riders who want precise steering and minimal weight penalty. It is compatible with most 31.8 mm stems and many cockpit setups, though riders with very compact frames may need to check clearance between the bar ends and their frame. Regular inspection for carbon fatigue and careful installation are recommended to preserve performance across long seasons of riding.
Buying Guide
Material And Construction
Choose between aluminum and carbon based on your budget, weight goals, and riding style. Aluminum 6061 bars are highly durable, resist dents, and are cost-effective, making them ideal for all-mountain and enduro riders who frequently ride rough terrain. Carbon bars save weight and can offer a slightly stiffer, more responsive feel with excellent vibration damping, but they come at a higher price and, in some cases, with a higher risk of damage from impact. Consider how much trail feedback you want and whether you ride in wet or rocky conditions where curb impacts are more common.
Width And Rise
780 mm is a common width that provides a confident, planted feel on diverse terrain while remaining manageable on most frame sizes. Wider bars improve leverage and stability on descents, while narrower widths can enhance maneuverability in tight singletrack. Rise is a critical factor: 25–120 mm options suit different torso lengths and riding styles. Higher rises open up the riding stance for climbing comfort and shoulder relaxation, whereas lower rises shorten the reach for quicker steering. If you ride in rocky terrain or frequently lift the front wheel on steeper segments, a higher rise may be beneficial.
Ergonomics And Geometry
Backsweep and upsweep influence wrist and shoulder comfort. Most 31.8 bars feature a modest rearward sweep (about 10–12 degrees) to position the hands ergonomically and reduce fatigue over long rides. A slightly forward or upward bend can help riders with shoulder strain or neck tension. When assessing geometry, consider your typical riding posture, saddle setback, and stem length. A well-matched combination enhances control, reduces fatigue, and promotes a natural grip on trail obstacles.
Compatibility And Installation
Most 31.8 mm handlebars fit standard stems and headsets, but confirm compatibility with your bike’s cockpit, including stem length, head tube angle, and the clearance between the bar ends and the rider’s legs. When installing, torque clamping bolts to the manufacturer’s recommendations and re-torque after a short ride. If you switch from a narrower bar, you may need to adjust your bar height, saddle position, and shifter reach to maintain ergonomic efficiency and crash protection. Budget-conscious riders should weigh the durability of aluminum against the weight savings of carbon when choosing a new bar.
Maintenance And Longevity
Regular inspection for fatigue, cracks, or deformation is essential, especially on aluminum bars that experience repeated high-stress impacts. Carbon bars require careful handling to avoid micro-cracks; inspect for any signs of delamination or impact damage after big hits. Clean bars with mild soap and water, avoid harsh solvents, and check the bar-end plugs for security. If you ride aggressively or frequently hit rocky sections, consider a bar with thicker walls or reinforced areas in the drop zones to extend life and performance.