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The Funn Full-On is the definitive choice for mountain bikers seeking reliable cockpit performance on a strict budget. While carbon fiber and high-end proprietary alloy bars dominate the headlines, the Full-On proves that a well-designed aluminum bar does not need to cost three figures to deliver great trail performance. Constructed from hydroformed and double-butted 6061 aluminum alloy, it provides the strength and durability required for everything from local singletrack to rowdy downhill bike park days. Performance-wise, the Full-On provides predictable, no-nonsense steering. It handles hard impacts, sideways landings, and aggressive cornering without flex, offering a very connected feel to the trail. However, because it relies on standard 6061 alloy without exotic tapering or damping treatments, it transfers more surface vibration and harshness directly into the rider's hands. On long, sustained descents over braking bumps, riders will likely experience forearm fatigue earlier than they would on premium carbon or high-end 7-series alloy bars. Weighing in at approximately 335 grams, it is among the heavier options available, reflecting the extra metal required to ensure structural safety at this price point. That said, with an entry price around $45, the value is undeniable. For replacement cockpits, budget custom builds, or riders prone to frequent crashes who do not want to risk an expensive composite bar, the Full-On is a remarkably dependable workhorse. **Highlights** - Outstanding value with a retail price point hovering near $45. - Tough 6061 hydroformed, double-butted aluminum withstands hard impacts and crashes. - Wide availability across various clamp diameters, rises, and colors. - Laser-etched cut marks make trimming down to personal width straightforward. - Delivers rigid, flex-free steering under aggressive loads. **Watch-outs** - Noticeably heavier than carbon alternatives at roughly 335 grams. - Offers minimal vibration damping, leading to increased fatigue on rough, prolonged descents.
Pros
- Unbeatable value at roughly forty-five dollars
- Tough 6061 double-butted alloy resists crash damage
- Stiff construction delivers crisp, flex-free steering
- Clear laser-etched markings simplify cockpit setup and trimming
Cons
- Heavier than higher-end alloy and carbon handlebars at 335g
- Transfers significant trail chatter, accelerating forearm fatigue
- Lacks the engineered compliance found in premium alternatives
Best uses
- Budget mountain bike builds
- Downhill and bike park laps
- Rough trail and all-mountain riding
- Replacing damaged stock handlebars
Specifications
- Material
- Double-butted 6061 aluminum
- Weight
- Approximately 335 grams
- Approximate Price
- Around $45
- Intended Use
- Trail, all-mountain, and downhill
- Construction
- Hydroformed alloy tubing
Pricing
We don't publish a price we haven't verified. The retailer links below open the live listing for this exact model.
Best for
Budget mountain bike builds, Downhill and bike park laps, Rough trail and all-mountain riding, Replacing damaged stock handlebars
Where to buy the Full-On
Prices and stock change often, so check the current Amazon offer before you buy.
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The Funn Full-On targets mountain bikers who require an ultra-durable, dependable steering platform without spending three figures. In an era where carbon fiber and premium proprietary alloys dominate the conversation, this handlebar represents a functional, no-frills alternative. Retailing around $45, it is engineered primarily to handle aggressive abuse, making it a staple recommendation for budget custom builds, winter project bikes, or riders who simply refuse to overpay for consumable cockpit parts. Constructed from double-butted 6061 aluminum, the Full-On prioritizes impact resistance and absolute stiffness over lightweight compliance. Weighing approximately 335 grams, it carries an obvious weight penalty compared to premium offerings, but that mass translates directly into structural peace of mind. It delivers direct, unfiltered steering input that works well on aggressive trail rides, bike park laps, and downhill descents where precision and durability matter far more than shaving a few dozen grams. The trade-off comes down to ride feel. Because it lacks sophisticated wall-thickness tapering or vibration-absorbing treatments, the Full-On passes road and trail feedback straight into the rider's hands. For budget-minded shredders and riders who frequently crash, however, its sheer toughness and replacement economy make it a practical, highly capable workhorse.
Target Rider Profile
The Funn Full-On is built for mountain bikers who prioritize value and structural reliability above all else. It is an ideal pick for riders building a secondary hardtail, piecing together a bike park rig, or replacing a bent stock bar without spending substantial cash. Beginners and intermediate riders who crash occasionally will appreciate that damaging a forty-five-dollar aluminum bar does not ruin their season's budget. Conversely, cross-country racers chasing grams and endurance riders battling chronic hand fatigue should look elsewhere. The Full-On suits downhillers, freeriders, and everyday trail enthusiasts who care about tough, point-and-shoot steering on technical terrain and want a bar they can install and forget.
Materials and Construction
Funn fabricates the Full-On using hydroformed 6061 aluminum alloy that undergoes a double-butting process. Double-butting allows engineers to keep tubing walls thicker near the central clamp area and high-stress bends while thinning out regions that experience lower structural loads. This technique provides reasonable strength-to-weight optimization without driving production costs into premium territory. While 6061 alloy is slightly less exotic than 7000-series alloys often seen on higher-end bars, it remains one of the most reliable and fatigue-resistant materials in bicycle manufacturing. The durable bead-blasted surface finish resists gouges and scratches from control clamps, contributing to longevity through many seasons of heavy use.
Trail Performance and Damping
Out on the trail, the Full-On exhibits a distinctly stiff, unyielding personality. Under aggressive cornering loads and high-compression landings, there is zero noticeable flex, providing immediate and predictable front-wheel tracking. When throwing the bike into hard berms or pulling up over large drops, the cockpit feels rock solid. However, that high rigidity has a well-documented downside: minimal vibration damping. Trail chatter, small rock gardens, and sustained braking bumps transmit directly through the bar into the rider's wrists and forearms. On long, rough descents, this lack of compliance can accelerate arm pump compared to tuned carbon bars or compliantly engineered alloy alternatives.
Durability and Crash Resistance
Durability is the principal strength of the Full-On. Aluminum handles direct rock strikes, shuttle-rub friction, and hard crashes with far more grace than composite materials. Whereas a deep gouge on a carbon handlebar often necessitates immediate retirement due to catastrophic failure risks, quality 6061 alloy provides a predictable yield point. The Full-On can endure numerous off-camber spills and shuttle rides without structural compromise. For downhill racers, park regulars, and aggressive trail riders who routinely push past their limits, this resilience provides essential peace of mind. It is designed to take repeated punishment without demanding delicate handling.
Fit and Cockpit Tuning
Setting up the Funn Full-On is straightforward, aided by laser-etched alignment markers at the stem clamp and increment marks at the bar ends. These clear guides simplify the process of centering, adjusting roll angle, and trimming the bar to personal width using a standard tubing cutter or hacksaw. The sweep angles provide a standard, ergonomic hand position that feels intuitive across broad trail and gravity setups. However, because the alloy is fundamentally rigid, pairing this bar with compliant, vibration-damping grips and running appropriate front tire pressures is highly recommended to offset chatter before it reaches your hands.
Value and Realistic Trade-Offs
At approximately $45, the Full-On competes primarily against stock original-equipment handlebars and entry-level options from brands like Race Face and Spank. High-end bars costing two to three times as much, such as the Race Face Atlas or Renthal Fatbar, utilize proprietary alloys or complex tapering to shave 30 to 50 grams while introducing noticeable vertical compliance. The Full-On sacrifices that refined compliance and weighs in around 335 grams, but it matches those premium alternatives in sheer impact resilience. For riders watching their budget, that trade-off represents one of the most sensible compromises in modern mountain bike componentry.
How we picked
We started with a long list of mountain bike handlebars that people actually buy, cut anything that could not clear our baseline for durability and field performance, then ranked the 10 that were left against the same criteria. Rankings are editorial. No brand pays for placement, and affiliate links never move a pick up or down.
- Real-world durability
- How the material, stitching, or steel holds up after a season of hard use — not how it looks new.
- Performance in bad conditions
- Wind, rain, cold, and grit are the test. Anything that only works on a nice day gets marked down.
- Weight and packability
- Every ounce has to earn its place in the pack, but not at the cost of something that fails in the field.
- Ease of use
- Setup, adjustment, and maintenance with cold hands, in the dark, without the manual.
- Value at its price point
- Compared against the closest competitors in the same tier, not against cheaper gear in a different class.
- Repairability and support
- Field-fixable design, available parts, and a warranty the maker actually honors.
Full-On — frequently asked questions
- Is the Full-On worth it?
- We rank it #5 in Mountain Bike Handlebars. The Funn Full-On is the definitive choice for mountain bikers seeking reliable cockpit performance on a strict budget. While carbon fiber and high-end proprietary alloy bars dominate the headlines, the Full-On proves that a well-designed aluminum bar does not need to cost three figures to deliver great trail…
- What is the Full-On best for?
- Best for budget mountain bike builds, downhill and bike park laps, rough trail and all-mountain riding and replacing damaged stock handlebars. Standouts: unbeatable value at roughly forty-five dollars and tough 6061 double-butted alloy resists crash damage.
- What are the downsides of the Full-On?
- Heavier than higher-end alloy and carbon handlebars at 335g, Transfers significant trail chatter, accelerating forearm fatigue and Lacks the engineered compliance found in premium alternatives.
- What are the key specs of the Full-On?
- Material: Double-butted 6061 aluminum · Weight: Approximately 335 grams · Approximate Price: Around $45 · Intended Use: Trail, all-mountain, and downhill · Construction: Hydroformed alloy tubing
- Target Rider Profile — what should I know about the Full-On?
- The Funn Full-On is built for mountain bikers who prioritize value and structural reliability above all else. It is an ideal pick for riders building a secondary hardtail, piecing together a bike park rig, or replacing a bent stock bar without spending substantial cash.
- Materials and Construction — what should I know about the Full-On?
- Funn fabricates the Full-On using hydroformed 6061 aluminum alloy that undergoes a double-butting process. Double-butting allows engineers to keep tubing walls thicker near the central clamp area and high-stress bends while thinning out regions that experience lower structural loads.
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