2025 Norco Optic C1 vs 2026 Norco Fluid A4
The S is the Norco Fluid A4 size closest to your 1 Norco Optic C1. 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 Fluid A4
Compared with the Norco Optic C1 in 1, the Norco Fluid A4 in S places the top of the head tube 9 mm higher and about as far forward, relative to the bottom bracket. Its wheelbase is 7 mm longer, which can contribute to stability at speed.
- Frame stack
- +9 mm
- Higher front end
- Frame reach
- −3 mm
- About the same reach
- Wheelbase
- +7 mm
- Longer: steadier at speed
- 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
Only the Norco Optic C1 is drawn. The Norco Fluid A4 numbers we have for size S are missing the head angle, seat angle and chainstay length.
Geometry side by side
| Measurement | Norco Optic C1 1 | Norco Fluid A4 S | Difference |
|---|---|---|---|
| Reach | 422.5 | 420 | −3 mm |
| Stack | 608 | 617 | +9 mm |
| Head tube angle | 65.0 | not listed | |
| Seat tube angle | 76.5 | not listed | |
| Effective top tube | 568 | not listed | |
| Chainstay length | 421 | not listed | |
| Wheelbase | 1159 | 1166 | +7 mm |
| BB drop | 32 | not listed | |
| BB height | 346 | not listed | |
| Standover | 675 | 678 | +3 mm |
| Seat tube length | 350 | 360 | +10 mm |
| Head tube length | 100 | 110 | +10 mm |
Differences are the Norco Fluid A4 minus the Norco Optic C1. Full charts: 2025 Norco Optic C1, 2026 Norco Fluid A4.
Where each sits in its class
Norco Optic C1Norco Fluid A4
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 Optic C1C1 | Norco Fluid A4A4 |
|---|---|---|
| Frame | Norco Optic | not listed |
| Fork | Fox 34 Factory | RockShox Recon Silver |
| Rear shock | Fox Float X Factory | X-Fusion 02 Pro R |
| Shifter | SRAM Pod Controller Ultimate | Shimano Deore |
| Derailleur | SRAM X0 Eagle AXS | Shimano Deore |
| Cassette | SRAM 1295 Eagle | SunRace CSMS8 |
| Chain | SRAM X0 Eagle | KMC X11 |
| Crankset | SRAM X0 Eagle | FSA Comet |
| Chainring | SRAM 30t | not listed |
| Bottom bracket | SRAM DUB | SRAM DUB BB BSA Threaded |
| Wheelset | We Are One Faction | Stan's NoTubes Flow D |
| Tire | Maxxis Minion DHF, Maxxis Disector | Goodyear Newton |
| Hub | Industry Nine 1/1 | not listed |
| Rim | We Are One Faction | not listed |
| Brake | SRAM Code RSC | Tektro HD-535 |
| Rotor | SRAM Centerline, SRAM CenterLine | not listed |
| Handlebar | OneUp Components Carbon 35 | e*thirteen 800mm 20mm Rise |
| Stem | OneUp Components OneUp | Norco 6061 Alloy 40mm Length 35mm Clamp |
| Grips | Ergon GE1 | not listed |
| Headset | FSA No. 57 ZS | Sealed Bearing Tapered |
| Dropper post | OneUp Components V3 | SDG Tellis Dropper |
| Saddle | Ergon SM-1 | Trail |
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