Velopedia Bicycle Archive
2025 Norco Optic A1
Original manufacturer specifications including 29"; 29"/27.5" wheels, 16.1 kg (35.6 lbs) published weight, geometry for 10 published sizes.
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What Velopedia knows
- Model year
- 2025
- Category
- Mountain
- Original MSRP
- $5,499.00
- Sizes
- 1, 2, 3, 4, 5
- Colors
- Névé White
- Weight
- 16.1 kg (35.6 lbs)
- Geometry
- 10 manufacturer sizes · Geometry context
- Record coverage
- 22 preserved details · 7 archived images · original MSRP · preserved geometry
- Archive ID
- 900001387
Frameset
| Frame Construction | Aluminum Frame, 125mm Travel, UDH, Eagle Transmission Compatible, Ride Aligned™ |
|---|---|
| Frame Material | Aluminum |
| Fork | Fox 34 Factory Float, GripX, HSC/LSC/LSR, 140mm, 44mm Offset, Fender Included |
| Rear Shock | Fox Float X Factory, 185x50mm TR |
Drivetrain
| Shifters | SRAM Pod Ultimate Controller, MMX Bridge |
|---|---|
| Rear Derailleur | SRAM GX Eagle AXS T-Type, 12sp |
| Crankset | SRAM Eagle, 30T, CL55, 165mm (S1,S2) -170mm (S3,S4,S5) |
| Bottom Bracket | SRAM DUB, BSA 73mm, MTB Wide |
| Cassette | SRAM 1275 Eagle T-Type, 10-52T, 12sp |
| Chain | SRAM GX Eagle T-Type, 12spd |
Brakes
| Brakes | (F) SRAM Code Silver Stealth, 4-Piston, Sintered Pads / (R) SRAM Code Silver Stealth, 4-Piston, Sintered Pads; Rotors: (F) SRAM Centerline, 180mm, 1.8mm Thickness, 6-bolt / (R) SRAM Centerline, 180mm, 1.8mm Thickness, 6-bolt; Levers: SRAM Code Silver Stealth |
|---|
Cockpit & Contact Points
| Headset | FSA No. 57 ZS, Sealed Bearing, Tapered 1-1/8" - 1.5", ( ZS44/28.6 | ZS56/40 ) |
|---|---|
| Handlebar | OneUp Aluminum, 800mm, 20mm rise |
| Stem | OneUp 42mm Length , 35mm Clamp |
| Saddle | Fizik Alpaca Terra X5 |
| Seatpost | OneUp V3 w/ One Up 1x lever,34.9mm, 150 (S1) -180mm (S2) -210mm (S3,S4) -240mm (S5) |
Wheels & Tires
| Hubs | (F) DT Swiss 350, 15x110 Boost, 32H, 6-bolt / (R) DT Swiss 350, 12x148 Boost, XD, 6-bolt |
|---|---|
| Rims | Stan's Flow S2, 32H, F/R- 29", 30mm ID |
| Front Tire | Maxxis Minion DHF, 3C Max Terra EXO, 29x2.5", Folding |
| Rear Tire | Maxxis Dissector 2.4", 3C, MaxxTerra / EXO / TR, Folding |
| Wheel Size | 29"; 29"/27.5" |
Size-specific frame data
Geometry
Manufacturer-published geometry normalized for consistent archival comparison. Effective top tube and reach remain separate measurements because they describe different aspects of fit.
| Measurement | 1 · 29" | 2 · 29" | 3 · 29" | 4 · 29" | 5 · 29" | 1 · 29"/27.5" | 2 · 29"/27.5" | 3 · 29"/27.5" | 4 · 29"/27.5" | 5 · 29"/27.5" |
|---|---|---|---|---|---|---|---|---|---|---|
| Seat tube | 350 mm | 370 mm | 385 mm | 430 mm | 445 mm | 350 mm | 370 mm | 385 mm | 430 mm | 445 mm |
| Effective top tube | 568 mm | 593 mm | 617 mm | 641 mm | 665 mm | 568 mm | 593 mm | 617 mm | 641 mm | 665 mm |
| Head tube | 100 mm | 110 mm | 120 mm | 130 mm | 140 mm | 100 mm | 110 mm | 120 mm | 130 mm | 140 mm |
| Head-tube angle | 65° | 65° | 65° | 65° | 65° | 65° | 65° | 65° | 65° | 65° |
| Seat-tube angle | 76.5° | 76.75° | 77° | 77.25° | 77.5° | 76.5° | 76.75° | 77° | 77.25° | 77.5° |
| Chainstay / rear center | 421 mm | 425 mm | 429 mm | 433 mm | 437 mm | 415 mm | 419 mm | 423 mm | 427 mm | 431 mm |
| Wheelbase | 1159 mm | 1193 mm | 1226 mm | 1259 mm | 1292 mm | 1154 mm | 1188 mm | 1221 mm | 1254 mm | 1287 mm |
| Bottom-bracket drop | 32/32 | 32/32 | 32/32 | 32/32 | 32/32 | 32/11 | 32/11 | 32/11 | 32/11 | 32/11 |
| Bottom-bracket height | 346 mm | 346 mm | 346 mm | 346 mm | 346 mm | 346 mm | 346 mm | 346 mm | 346 mm | 346 mm |
| Reach | 422.5 mm | 447.5 mm | 472.5 mm | 497.5 mm | 522.5 mm | 422.5 mm | 447.5 mm | 472.5 mm | 497.5 mm | 522.5 mm |
| Stack | 608 mm | 617 mm | 626 mm | 635 mm | 644 mm | 608 mm | 617 mm | 626 mm | 635 mm | 644 mm |
| Standover height | 660 mm | 673 mm | 682 mm | 703 mm | 714 mm | 660 mm | 673 mm | 682 mm | 703 mm | 714 mm |
| Fork offset / rake | 44 mm | 44 mm | 44 mm | 44 mm | 44 mm | 44 mm | 44 mm | 44 mm | 44 mm | 44 mm |
| Trail | 128 mm | 128 mm | 128 mm | 128 mm | 128 mm | 128 mm | 128 mm | 128 mm | 128 mm | 128 mm |
| Crank length | 170 mm | 170 mm | 170 mm | 170 mm | 170 mm | 170 mm | 170 mm | 170 mm | 170 mm | 170 mm |
| Stem length | 40 mm | 40 mm | 40 mm | 40 mm | 40 mm | 40 mm | 40 mm | 40 mm | 40 mm | 40 mm |
| Wheel size | 29" | 29" | 29" | 29" | 29" | 29"/27.5" | 29"/27.5" | 29"/27.5" | 29"/27.5" | 29"/27.5" |
Geometry source: Norco first-party embedded geometry data ↗ Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.
Geometry tools
Analyze a published size
The manufacturer publishes more than one geometry configuration. Velopedia analyzes each labeled state separately while treating them as one chassis in archive comparisons.
1 geometry
Configuration
Archive context: The chainstay of 421 mm sits toward the shorter rear-center end. Its reach of 422.5 mm sits toward the longer end. Its wheelbase of 1159 mm sits toward the longer end.
Compared with 61 distinct mountain geometries in the XS-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze 1 · 29" geometry Archive context: The chainstay of 415 mm sits toward the shorter rear-center end. Its reach of 422.5 mm sits toward the longer end. Its stack of 608 mm sits somewhat taller than typical.
Compared with 61 distinct mountain geometries in the XS-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze 1 · 29"/27.5" geometry 2 geometry
Configuration
Archive context: Its reach of 447.5 mm sits toward the longer end. The chainstay of 425 mm sits toward the shorter rear-center end. Its wheelbase of 1193 mm sits somewhat longer than typical.
Compared with 195 distinct mountain geometries in the Small-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze 2 · 29" geometry Archive context: The chainstay of 419 mm sits toward the shorter rear-center end. Its reach of 447.5 mm sits toward the longer end. The seat angle of 76.8° sits somewhat steeper than typical.
Compared with 195 distinct mountain geometries in the Small-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze 2 · 29"/27.5" geometry 3 geometry
Configuration
Archive context: Its reach of 472.5 mm sits toward the longer end. The chainstay of 429 mm sits toward the shorter rear-center end. Its wheelbase of 1226 mm sits somewhat longer than typical.
Compared with 199 distinct mountain geometries in the Medium-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze 3 · 29" geometry Archive context: The chainstay of 423 mm sits toward the shorter rear-center end. Its reach of 472.5 mm sits toward the longer end. The seat angle of 77° sits somewhat steeper than typical.
Compared with 199 distinct mountain geometries in the Medium-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze 3 · 29"/27.5" geometry 4 geometry
Configuration
Archive context: Its reach of 497.5 mm sits toward the longer end. The seat angle of 77.3° sits somewhat steeper than typical. The chainstay of 433 mm sits somewhat shorter than typical.
Compared with 193 distinct mountain geometries in the Large-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze 4 · 29" geometry Archive context: Its reach of 497.5 mm sits toward the longer end. The chainstay of 427 mm sits toward the shorter rear-center end. The seat angle of 77.3° sits somewhat steeper than typical.
Compared with 193 distinct mountain geometries in the Large-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze 4 · 29"/27.5" geometry 5 geometry
Configuration
Archive context: Its reach of 522.5 mm sits toward the longer end. The seat angle of 77.5° sits toward the steeper end. Its wheelbase of 1292 mm sits somewhat longer than typical.
Compared with 166 distinct mountain geometries in the XL-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze 5 · 29" geometry Archive context: Its reach of 522.5 mm sits toward the longer end. The chainstay of 431 mm sits toward the shorter rear-center end. The seat angle of 77.5° sits toward the steeper end.
Compared with 166 distinct mountain geometries in the XL-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze 5 · 29"/27.5" geometry Parts & serviceability
Find replacement parts
SRAM GX Eagle T-Type, 12spd
Interpreted as SRAM GX · 12-speed Component family — verify exact version
SRAM 1275 Eagle T-Type, 10-52T, 12sp
Component family — verify exact version
Maxxis Minion DHF, 3C Max Terra EXO, 29x2.5", Folding
Named tire and published size
More qualified parts (5)
SRAM DUB, BSA 73mm, MTB Wide
Named archived component — verify dimensions
Fizik Alpaca Terra X5
Named archived component — verify exact version
SRAM Eagle, 30T, CL55, 165mm (S1,S2) -170mm (S3,S4,S5)
Component family — verify exact version
SRAM GX Eagle AXS T-Type, 12sp
Interpreted as SRAM GX · 12-speed · electronic Component family — verify exact version
FSA No. 57 ZS, Sealed Bearing, Tapered 1-1/8" - 1.5", ( ZS44/28.6 | ZS56/40 )
Exact archived model
Searches use the archived manufacturer specification, not the components currently installed on a particular bicycle. Confirm the exact model, size and fit before ordering. As an Amazon Associate I earn from qualifying purchases. Velopedia may also earn from qualifying eBay purchases. Velopedia may also earn from qualifying retailer purchases. Commercial relationships do not influence Archive specifications or analysis.
Used-bike inspection
If you’re buying this bike used
Before any test ride: both brakes should stop the bike firmly and release cleanly; both wheels should run true and be securely attached; tires should have no casing damage; and the headset, handlebar, stem, cranks and pedals should have no looseness or play.
Follow the full used-bike inspection order →- FrameLook closely for dents and hairline cracks around welds, the head tube and bottom-bracket area. Cosmetic scratches matter less than a change in shape or a crack line.Inspect the frame and fork →
- BrakesIdentify the installed brake system before riding or ordering parts. Test every installed brake separately at walking speed, confirm it stops firmly and releases cleanly, then inspect its pads, braking surfaces and complete cable or hose path.Inspect the brakes →
- SuspensionAsk when the fork and shock were last serviced. Check the stanchions for damage, look for oil at the seals, cycle both units through their travel and test the suspension pivots for play.Evaluate the suspension →
- DrivetrainConfirm every shift-system battery charges, every shift control works and the derailleur moves cleanly across the cassette. Make sure the matching shift-system charger is included, then measure chain wear and inspect the cassette teeth.Check drivetrain wear →
- Wheels & tiresSpin both wheels and watch the rims for side-to-side or vertical movement. Check for dents, cracks, loose or uneven spokes and hub play, then inspect both tire casings for cuts, cracking or exposed threads.Check wheels and tires →
Bike-specific inspection checklist 22 checks based on 6 archived component groups Open checklistClose checklist
This checklist uses the archived equipment for this bike. It cannot confirm the condition, service history or later component changes of the example in front of you.
Identity and fit
Follow the full used-bike inspection order →Archived: 2025 Norco Optic A1 · Mountain · Published sizes: 1, 2, 3, 4, 5
Frame and fork
Inspect the frame and fork →Archived: Frame: Aluminum Frame, 125mm Travel, UDH, Eagle Transmission Compatible, Ride Aligned™ · Fork: Fox 34 Factory Float, GripX, HSC/LSC/LSR, 140mm, 44mm Offset, Fender Included
Suspension
Evaluate the suspension →Archived: Fork: Fox 34 Factory Float, GripX, HSC/LSC/LSR, 140mm, 44mm Offset, Fender Included · Rear shock: Fox Float X Factory, 185x50mm TR
Drivetrain
Check drivetrain wear →Archived: Shifters: SRAM Pod Ultimate Controller, MMX Bridge · Rear derailleur: SRAM GX Eagle AXS T-Type, 12sp · Crankset: SRAM Eagle, 30T, CL55, 165mm (S1,S2) -170mm (S3,S4,S5) · Bottom bracket: SRAM DUB, BSA 73mm, MTB WIDE · Cassette: SRAM 1275 Eagle T-Type, 10-52T, 12sp · Chain: SRAM GX Eagle T-Type, 12spd
Brakes
Inspect the brakes →Archived: Brakes: (F) SRAM Code Silver Stealth, 4-Piston, Sintered Pads / (R) SRAM Code Silver Stealth, 4-Piston, Sintered Pads; Rotors: (F) SRAM Centerline, 180mm, 1.8mm Thickness, 6-bolt / (R) SRAM Centerline, 180mm, 1.8mm Thickness, 6-bolt; Levers: SRAM Code Silver Stealth
Wheels and tires
Check wheels and tires →Archived: Wheel size: 29"; 29"/27.5" · Rims: Stan's Flow S2, 32H, F/R- 29", 30mm ID · Hubs: (F) DT Swiss 350, 15x110 Boost, 32H, 6-bolt / (R) DT Swiss 350, 12x148 Boost, XD, 6-bolt · Front tire: Maxxis Minion DHF, 3C Max Terra EXO, 29x2.5", Folding · Rear tire: Maxxis Dissector 2.4", 3C, MaxxTerra / EXO / TR, Folding
Controls and contact points
Archived: Headset: FSA No. 57 ZS, Sealed Bearing, Tapered 1-1/8" - 1.5", ( ZS44/28.6 | ZS56/40 ) · Handlebar: OneUp Aluminum, 800mm, 20mm rise · Stem: OneUp 42mm Length , 35mm Clamp · Seatpost: OneUp V3 w/ One Up 1x lever,34.9mm, 150 (S1) -180mm (S2) -210mm (S3,S4) -240mm (S5) · Saddle: Fizik Alpaca Terra X5
Before and during the test ride
Follow the full used-bike inspection order →Build relationships are limited to the archived manufacturer specifications. Confirm exact fit and standards before ordering parts or performing service.
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.