Norco OpticvsSpecialized Stumpjumper
The Norco Optic and Specialized Stumpjumper 15 both aim to be incredibly capable trail bikes, yet they achieve this through distinct engineering philosophies. For riders whose trails are a relentless diet of technical descents earned by equally challenging climbs, the Optic offers unmatched bump-eating performance within its travel. However, the Stumpjumper 15 counters with a highly adaptable ride, delivering impressive versatility and a uniquely refined suspension feel that can be tailored to nearly any trail scenario.
Overview
Norco's Optic, with its 125mm of rear travel, represents a radical departure in the trail category, adopting a high-pivot Virtual Pivot Suspension (VPSHP) system more commonly found on downhill and enduro machines. This design fundamentally re-vectors the axle path, aiming for astonishing bump absorption and composure on descents, pushing the boundaries of what a short-travel bike can handle. It positions itself as a 'short-travel trail smasher' for those who live for aggressive downhill performance but still need to pedal to the top. The Specialized Stumpjumper 15, conversely, continues its legacy as a quintessential all-rounder, now streamlined into a single 145mm travel platform. Its updated FSR suspension, featuring the innovative proprietary Fox GENIE shock, emphasizes a blend of plush compliance and robust bottom-out resistance. Specialized designed the Stumpjumper 15 to be a 'one bike quiver,' offering extensive geometry adjustments to morph its character, from a playful daily rider to a confidence-inspiring machine for gnarlier terrain. While the Optic targets a specialized kind of aggression, the Stumpjumper 15 aims for broad appeal through adaptability and sophisticated suspension tuning.
Ride and handling
The Norco Optic’s high-pivot suspension delivers a ride quality that genuinely
Specifications
Comparing the Norco Optic A1 and Specialized Stumpjumper S-Works 15 LTD builds highlights a vast price disparity, with the S-Works model costing significantly more. However, looking across all available builds for both bikes reveals distinct component philosophies and value considerations. Norco's A1 comes with a SRAM GX Eagle AXS T-Type drivetrain, a solid wireless setup. The Stumpjumper S-Works 15 LTD, as expected, features the top-tier SRAM XX Eagle SL Transmission. Many carbon Stumpjumper builds are exclusively compatible with wireless drivetrains, which can be a significant point of contention for riders loyal to mechanical Shimano setups, though alloy Stumpjumpers do retain cable routing. Suspension-wise, the Optic A1 runs a Fox 34 Factory 140mm fork and a Fox Float X Factory rear shock, a high-performance trail combo. The Stumpjumper S-Works 15 LTD ups the ante with a Fox 36 Factory 150mm fork and a Fox DHX Live Valve Neo Factory shock, a sophisticated electronic coil setup designed for ultimate control. Notably, all carbon Stumpjumper builds feature the proprietary Fox GENIE air shock (or a coil equivalent), which defines its ride character, whereas the Optic is coil-compatible but doesn't have a unique shock technology. Reviews suggest the Optic's Fox 34 fork can be 'fickle to set up perfectly,' while the GENIE shock is largely praised for its performance, though some express skepticism about proprietary tech. Braking is a critical area where value deviates. The Optic A1 includes SRAM Code Silver Stealth brakes. While Codes are generally powerful, reviewers of the top-tier Optic C1 (which also gets Code Silver) found them 'underpowered' for the bike's aggressive capabilities, suggesting an immediate upgrade. Conversely, several Stumpjumper builds, including the S-Works, boast SRAM Maven Ultimate (or Bronze) brakes paired with large rotors, offering 'immense power' that some riders found almost 'too touchy' initially. Interestingly, Norco's more affordable Optic C2 build often comes with SRAM Code R brakes, which are considered more suitable for aggressive trail riding than the Level brakes found on other Optic builds, hinting at a better value in that specific model. Wheels and tires also differ. The Optic A1 uses Stan's Flow S2 aluminum rims with DT Swiss 350 hubs, a reliable and durable setup, shod with Maxxis Minion DHF/Dissector tires. The S-Works Stumpjumper 15 LTD features Roval Traverse HD carbon wheels and DT Swiss 240 hubs, a premium, lightweight, and robust combination. However, stock Specialized Butcher/Eliminator tires across many Stumpjumper builds are often criticized for being 'too flexible and under-protected' for aggressive riding, necessitating a tougher casing upgrade for riders pushing the bike's limits. The Optic's Maxxis combo is generally well-regarded. Frame features also vary, with the Stumpjumper offering integrated SWAT downtube storage and tool mounts, a clear advantage in practicality, while the Optic includes accessory bosses but no internal frame storage.
| Optic | Stumpjumper | |
|---|---|---|
| FRAMESET | ||
| Frame | Aluminum frame, 125mm travel, UDH, Eagle Transmission compatible, Ride Aligned™ | Specialized M5 Alloy chassis and rear-end, Trail Geometry, SWAT™ Door integration, head tube angle adjustment, threaded BB, internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, SRAM UDH compatible, 145mm travel |
| Fork | Fox 34 Factory Float, GripX, HSC/LSC/LSR, 140mm, 44mm offset, fender included | RockShox Psylo Silver, Motion Control Damper, 15x110mm axle, 44mm offset (S1: 140mm travel; S2–S6: 150mm travel) |
| Rear shock | Fox Float X Factory, 185x50mm TR | X-Fusion 02 Pro RL, Ride Dynamics Trail Tune, rebound adjust, lockout (S1: 210x52.5mm; S2–S6: 210x55mm) |
| GROUPSET | ||
| Shift levers | SRAM Pod Ultimate Controller, MMX Bridge | Shimano Deore M6100, 12-speed |
| Front derailleur | — | — |
| Rear derailleur | SRAM GX Eagle AXS T-Type, 12-speed | Shimano Deore M6100, 12-speed, Shadow Plus |
| Cassette | SRAM 1275 Eagle T-Type, 12-speed, 10-52T | Shimano Deore M6100, 12-speed w/ Hyperglide+, 10-51T |
| Chain | SRAM GX Eagle T-Type, 12-speed | Shimano Deore M6100, 12-speed |
| Crankset | SRAM Eagle, 30T, CL55, 165mm (S1,S2) / 170mm (S3,S4,S5) | Shimano Deore M6120, 30T ring, 55mm chainline (S1–S3: 165mm; S4–S6: 170mm) |
| Bottom bracket | SRAM DUB, BSA 73mm, MTB WIDE | BSA, 73mm, threaded |
| Front brake | SRAM Code Silver Stealth, 4-piston, sintered pads | Shimano BR-MT420, 4-piston hydraulic disc |
| Rear brake | SRAM Code Silver Stealth, 4-piston, sintered pads | Shimano BR-MT420, 4-piston hydraulic disc |
| WHEELSET | ||
| Front wheel | Stan's Flow S2, 29", 30mm ID, 32H; DT Swiss 350, 15x110 Boost, 32H, 6-bolt; Sapim Race butted 2.0/1.8/2.0, 14G, stainless steel | Specialized Alloy, Tubeless Ready, 29mm internal width, 28h (Front: 29"); Alloy, sealed cartridge bearings, 15x110mm thru-axle, 28h; Stainless, 14g |
| Rear wheel | Stan's Flow S2, 29", 30mm ID, 32H; DT Swiss 350, 12x148 Boost, XD driver, 6-bolt; Sapim Race butted 2.0/1.8/2.0, 14G, stainless steel | Specialized Alloy, Tubeless Ready, 29mm internal width, 28h (Rear: S1–S2: 27.5"; S3–S6: 29"); Alloy, sealed cartridge bearings, 12x148mm thru-axle, 28h; Stainless, 14g |
| Front tire | Maxxis Minion DHF, 3C Max Terra, EXO, 29x2.5, folding | Butcher, GRID TRAIL casing, GRIPTON® T9 compound, 2Bliss Ready, 29x2.3" |
| Rear tire | Maxxis Dissector, 3C MaxxTerra, EXO, TR, 29x2.4, folding | Eliminator, GRID TRAIL casing, GRIPTON® T7 compound, 2Bliss Ready (S1–S2: 27.5x2.3"; S3–S6: 29x2.3") |
| COCKPIT | ||
| Stem | OneUp, 42mm length, 35mm clamp | Alloy Trail Stem, 35mm bar bore |
| Handlebars | OneUp Aluminum, 800mm, 20mm rise | Specialized 6000-series alloy, 6° upsweep, 8° backsweep (S1–S2: 780mm width, 20mm rise; S3–S4: 800mm width, 30mm rise; S5–S6: 800mm width, 40mm rise) |
| Saddle | Fizik Alpaca Terra X5 | Bridge, steel rails (S1–S2: 155mm; S3–S6: 143mm) |
| Seatpost | OneUp V3 w/ OneUp 1x lever, 34.9mm, 150mm (S1) / 180mm (S2) / 210mm (S3,S4) / 240mm (S5) | TranzX dropper, remote SLR LE lever, 34.9mm (S1: 125mm; S2: 150mm; S3: 170mm; S4–S6: 200mm) |
| Grips/Tape | Ergon GE1, Slim (S1,S2) / Standard (S3,S4,S5) | Specialized Trail Grips |
Geometry and fit comparison
When comparing the Specialized Stumpjumper in S5 to a comparably sized Norco Optic S5, a few key geometry differences dictate their on-trail feel. The Optic presents a significantly longer reach at 522.5mm compared to the Stumpjumper’s 500mm. This extra length on the Norco suggests a more stretched-out cockpit, especially when standing, demanding an aggressive riding stance that benefits high-speed stability. Conversely, the Stumpjumper offers a slightly taller stack height (654mm vs. Optic’s 644mm), which, combined with its shorter reach, positions the rider more upright and central on the bike. This contributes to the Stumpjumper's 'sat-in' feel, promoting confidence and a more relaxed posture for varied terrain. The head tube angles also diverge, with the Optic at a consistent 65.0 degrees across all sizes, while the Stumpjumper is slacker at 64.5 degrees (in its neutral setting). This slacker front end on the Specialized, coupled with a slightly greater trail figure (130mm vs. Optic's 128mm), lends itself to enhanced stability at speed and in steep terrain. In the rear, the Optic’s size-specific chainstay on the S5 is 437mm, noticeably shorter than the Stumpjumper’s 445mm. This contributes to the Optic's 'poppier' and more agile feel, making it eager to manual and change direction quickly. The Stumpjumper's longer chainstays, however, foster a more composed and predictable rear end, especially when combined with its lower bottom bracket drop of 38mm (the Optic only lists BB height at 346mm). The Stumpjumper also boasts adjustable headset cups and a flip-chip, allowing riders to fine-tune head tube angle (from 63 to 65.5 degrees) and bottom bracket height/chainstay length, providing unparalleled adaptability for different riding styles and conditions, a feature the fixed-geometry Optic lacks.
| FIT GEO | Optic | Stumpjumper | |
|---|---|---|---|
| Stack | 644 | 608 | -36 |
| Reach | 522.5 | 400 | -122.5 |
| Top tube | 665 | 541 | -124 |
| Headtube length | 140 | 95 | -45 |
| Standover height | 705 | 738 | +33 |
| Seat tube length | 445 | 385 | -60 |
| HANDLING | Optic | Stumpjumper | |
|---|---|---|---|
| Headtube angle | 65 | 64.5 | -0.5 |
| Seat tube angle | 77.5 | 78 | +0.5 |
| BB height | 346 | 334 | -12 |
| BB drop | — | 41 | — |
| Trail | 128 | 129 | +1 |
| Offset | 44 | 44 | 0 |
| Front center | — | 720 | — |
| Wheelbase | 1287 | 1149 | -138 |
| Chainstay length | 431 | 430 | -1 |
Who each one is for
Norco Optic
The Norco Optic is for the rider who seeks maximum descending prowess from a short-travel package and enjoys a lively, poppy bike that can also handle surprisingly aggressive terrain. If your local trails demand technical climbing interspersed with chunky, fast descents where you value composure and bump-eating capability over pure climbing speed, the Optic makes a compelling case. This bike suits someone who enjoys actively maneuvering their bike, hitting side-hits, and making quick line choices, but also wants the confidence to push hard on steep, rough sections without feeling overwhelmed by its limited travel. Be prepared for meticulous drivetrain maintenance to keep the high-pivot system running quietly and efficiently.
Specialized Stumpjumper
The Specialized Stumpjumper 15 suits the rider looking for a truly versatile 'one bike quiver' that excels across a wide spectrum of trail conditions. If you enjoy a bike that offers a plush, ground-hugging feel for incredible traction and comfort, yet can be tuned for lively pop and aggressive charging, this bike delivers. It's ideal for riders who appreciate extensive geometry adjustability to dial in their ride for everything from long-distance epics to bike park laps. If you frequently encounter diverse terrain and value robust frame features like SWAT storage and powerful brakes, the Stumpjumper 15 offers a refined and adaptable experience.
