Fatbar 35 vs Components V2 Carbon Handlebar
Our #1 and #2 picks from The 10 Best Mountain Bike Handlebars, compared spec-by-spec with clear pros, cons, and a verdict.
When the mountain bike industry shifted toward 35mm diameter handlebars, riders gained clamp strength and steering precision but frequently inherited punishing trail chatter and accelerated arm pump. Today's comparison pits two distinct philosophies against each other: the aluminum Renthal Fatbar 35 versus the OneUp Components Carbon Handlebar. Renthal carries decades of World Cup downhill pedigree, relying on premium 7-series shot-peened alloy to yield bombproof impact resistance and razor-sharp steering accuracy. In contrast, OneUp engineered their carbon bar with a radical ovalized profile tapering out from the clamp zone. This design purposefully introduces vertical compliance to dampen trail vibration while sustaining strict lateral stiffness for carving hard turns. Choosing between them hinges on your riding terrain, physical fatigue limits, and crash tolerance. Do you prefer an indestructible, competitively priced alloy classic built to withstand brutal bike park crashes, or an engineered carbon upgrade formulated specifically to preserve your hands and forearms over long, chattering descents?
Fatbar 35
Renthal
The Renthal Fatbar 35 is built for aggressive trail, enduro, and downhill riders who prioritize bombproof reliability, steering precision, and predictable feedback over shaving the final ounce. Renthal has long been a staple in motocross and downhill racing, and that lineage translates directly into this bar. Manufactured from high-grade 7-series aluminum alloy, it delivers exceptional impact resistance that provides peace of mind when casing jumps or laying the bike down in rock gardens, scenarios where some riders remain hesitant to trust carbon fiber. On the trail, the Fatbar 35 is known for its uncompromising directness. The 35mm clamp diameter paired with Renthal's tapered wall profiling results in instant front-wheel tracking, allowing riders to hold technical lines through high-load berms and off-camber roots without vague deflection. The trade-off for this pinpoint control is firmness. While it avoids the harsh, wrist-jarring feel of early-generation 35mm alloy bars, it does not mute high-frequency chatter as effectively as engineered carbon alternatives. Riders sensitive to forearm fatigue on sustained braking bumps will feel the trail more directly. At a verified weight around 311 grams, it carries an expected weight penalty over carbon competitors, but it offsets this with superior crash resilience and a significantly friendlier price tag near $111. The shot-peened finish and hard-anodized surface treatment also resist cable rub, brake lever clamping marks, and general trail wear better than almost anything else on the market. **Highlights** - High-grade 7-series aluminum construction offers exceptional impact and crash resistance. - Oversized 35mm clamp interface provides precise, flex-free steering under heavy loads. - Hard-anodized and shot-peened surface resists abrasion and clamping wear. - Detailed setup grid laser-etched onto the center section aids accurate cockpit adjustments. - Available in multiple rise options to fine-tune rider stack height. **Watch-outs** - Heavier than composite alternatives at roughly 311 grams. - Transmits more high-frequency trail vibration than compliance-tuned carbon bars.
Buy on AmazonComponents V2 Carbon Handlebar
OneUp
The OneUp Components V2 Carbon Handlebar is purpose-built for riders battling hand fatigue, arm pump, and wrist pain on long, rough descents. When the industry adopted the 35mm clamp standard, many handlebars became excessively stiff. OneUp addressed this issue by developing a patented ovalized profile that transitions from the 35mm stem clamp into a flattened shape through the transition zone before returning to standard control dimensions. This design maximizes vertical compliance to absorb impacts while preserving lateral stiffness for sharp, responsive steering. In real-world use, testing outlets consistently praise the V2 Carbon for offering one of the most forgiving rides on the market. It noticeably filters out braking bumps, rough chatter, and square-edged hits without feeling disconnected or mushy when muscling the front end into tight corners. At approximately 235 grams, it hits a very competitive weight for an aggressive trail and enduro-rated carbon bar, providing meaningful weight savings alongside its comfort benefits. The trade-off lies primarily in aesthetics and cockpit organization. The ovalized shaping gives the bar a distinct look that some riders may find unconventional compared to traditional round tubing. Furthermore, the flattened profile limits the real estate available for mounting certain bar-mounted accessories, such as computer mounts, lights, or specific remote levers that clamp close to the stem. For pure descending comfort and fatigue reduction, however, it remains an industry benchmark. **Highlights** - Patented ovalized shaping balances vertical compliance with lateral steering stiffness. - Highly effective at reducing arm pump and wrist fatigue over repetitive chatter. - Competitive weight of around 235 grams suitable for trail through enduro applications. - Tested to rigorous DH standards for strength and impact resistance. - Standard 35mm clamp diameter fits modern mountain bike stems. **Watch-outs** - Ovalized shaping reduces clamp space for lights, GPS mounts, and accessories near the center. - Distinctive flat profile may not appeal to riders preferring a classic round aesthetic.
Find it on AmazonSpec-by-Spec
| Spec | #1 Fatbar 35 | #2 Components V2 Carbon Handlebar |
|---|---|---|
| Weight | 305 g (20mm rise) | 225 g (20mm rise) |
| Width / Capacity | 800 mm (cut marks down to 740 mm) | 800 mm (cut marks down to 740 mm) |
| Materials | Shot-peened 7-series aluminum alloy | Unidirectional carbon fiber |
| Clamp & Geometry | 35 mm clamp; 7° backsweep, 5° upsweep | 35 mm clamp; 8° backsweep, 5° upsweep |
| Rise Options | 10 mm, 20 mm, 30 mm, 40 mm | 20 mm, 35 mm |
| Price Tier | Mid-tier ($95 - $105) | Premium ($150 - $160) |
| Warranty | 2-year limited warranty | 2-year limited warranty + crash replacement policy |
| Durability | High impact tolerance; bends rather than snaps; resists rock gouges | High fatigue strength; susceptible to deep impacts and pinch clamps |
| Portability & Setup | Laser-etched center grid and cut markings | Printed alignment lines and cut guides |
| Feature Highlights | Hard-anodized finish, ultra-rigid downhill-ready chassis | Patented ovalized shape for engineered vertical flex |
Fatbar 35
Best for: Downhill, freeride, and aggressive bike park riders demanding indestructible alloy strength and direct trail feedback at an accessible price.
Pros
- Bombproof 7-series alloy structure survives crashes that shatter carbon
- Comprehensive rise selection spanning from 10mm to 40mm
- Detailed laser-etched alignment grid ensures effortless cockpit setup
- Significantly lower price point than carbon competition
Cons
- High chassis stiffness transfers harsh high-frequency vibrations to hands
- Carries a substantial weight penalty compared to modern carbon options
Components V2 Carbon Handlebar
Best for: All-mountain and enduro riders seeking class-leading vibration damping and reduced arm pump on rough, sustained descents.
Pros
- Patented ovalized shaping effectively reduces arm pump and wrist fatigue
- Noticeably lighter weight (~80 grams shaved over aluminum)
- Delivers vertical compliance without sacrificing crisp lateral tracking
- Clean, understated graphics suit any bike build
Cons
- Roughly 50% more expensive than standard alloy bars
- Fewer rise options available compared to Renthal's lineup
- Demands strict torque wrench usage to prevent clamp-zone damage
The Verdict
The OneUp Components Carbon Handlebar takes the overall win by resolving the primary complaint of the 35mm clamp standard: excessive trail harshness. Its innovative ovalized profile provides genuine vertical compliance that filters out punishing trail chatter, staving off arm pump on technical descents while preserving razor-sharp steering inputs. Meanwhile, Renthal’s Fatbar 35 remains a benchmark in uncompromising gravity toughness, boasting an indestructible 7-series alloy shell, superior rise options, and a rider-friendly price tag. However, the Fatbar transmits substantially more vibration into the rider's upper body. For downhill racers, bike park shredders, and aggressive riders who crash regularly, the Fatbar 35 is an unyielding, cost-effective partner. But for trail and enduro riders logging long days across roots and braking bumps, OneUp's forearm-saving comfort and weight savings clearly justify the premium.