2026 Norco Fluid A4 vs 2025 Norco Optic C1
The 1 is the Norco Optic C1 size closest to your S Norco Fluid A4. We match frame stack and reach. This is a geometry comparison, not a fit recommendation; stem, spacers, handlebars and saddle setup also affect your riding position.
What changes on the Norco Optic C1
Compared with the Norco Fluid A4 in S, the Norco Optic C1 in 1 places the top of the head tube 9 mm lower and about as far forward, relative to the bottom bracket. Its wheelbase is 7 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −9 mm
- Lower front end
- Frame reach
- +3 mm
- About the same reach
- Wheelbase
- −7 mm
- Shorter: quicker to change direction
- Head angle
- n/a
- One of the bikes has no number for this
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
We can't draw these frames yet. The Norco Fluid A4 numbers we have for size S are missing the head angle, seat angle and chainstay length. The numbers below still compare.
Geometry side by side
| Measurement | Norco Fluid A4 S | Norco Optic C1 1 | Difference |
|---|---|---|---|
| Reach | 420 | 422.5 | +3 mm |
| Stack | 617 | 608 | −9 mm |
| Head tube angle | not listed | 65.0 | |
| Wheelbase | 1166 | 1159 | −7 mm |
| BB drop | not listed | 32 | |
| BB height | not listed | 346 | |
| Standover | 678 | 675 | −3 mm |
| Seat tube length | 360 | 350 | −10 mm |
| Head tube length | 110 | 100 | −10 mm |
| Seat tube angle | not listed | 76.5 | |
| Effective top tube | not listed | 568 | |
| Chainstay length | not listed | 421 |
Differences are the Norco Optic C1 minus the Norco Fluid A4. Full charts: 2026 Norco Fluid A4, 2025 Norco Optic C1.
Where each sits in its class
Norco Fluid A4Norco Optic C1
Each bike is ranked against the other trail bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.
What each ships with
The stock build of each bike's first listed trim. Parts that match are dimmed.
| Part | Norco Fluid A4A4 | Norco Optic C1C1 |
|---|---|---|
| Fork | RockShox Recon Silver | Fox 34 Factory |
| Rear shock | X-Fusion 02 Pro R | Fox Float X Factory |
| Shifter | Shimano Deore | SRAM Pod Controller Ultimate |
| Derailleur | Shimano Deore | SRAM X0 Eagle AXS |
| Cassette | SunRace CSMS8 | SRAM 1295 Eagle |
| Chain | KMC X11 | SRAM X0 Eagle |
| Crankset | FSA Comet | SRAM X0 Eagle |
| Bottom bracket | SRAM DUB BB BSA Threaded | SRAM DUB |
| Wheelset | Stan's NoTubes Flow D | We Are One Faction |
| Tire | Goodyear Newton | Maxxis Minion DHF, Maxxis Disector |
| Brake | Tektro HD-535 | SRAM Code RSC |
| Handlebar | e*thirteen 800mm 20mm Rise | OneUp Components Carbon 35 |
| Stem | Norco 6061 Alloy 40mm Length 35mm Clamp | OneUp Components OneUp |
| Headset | Sealed Bearing Tapered | FSA No. 57 ZS |
| Dropper post | SDG Tellis Dropper | OneUp Components V3 |
| Saddle | Trail | Ergon SM-1 |
| Frame | not listed | Norco Optic |
| Chainring | not listed | SRAM 30t |
| Hub | not listed | Industry Nine 1/1 |
| Rim | not listed | We Are One Faction |
| Rotor | not listed | SRAM Centerline, SRAM CenterLine |
| Grips | not listed | Ergon GE1 |
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