Velopedia Bicycle Archive
2021 Norco Aurum A1
Original specifications: 27.5" wheels · geometry for 4 published sizes.
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At a glance
- Model year
- 2021
- Category
- Mountain
- Sizes
- S, M, L, XL
- Colors
- Red
- Geometry
- 4 manufacturer sizes
- In this record
- 20 specifications · archived image · geometry
- Archive ID
- 900000113
Original build27.5"
Frameset
| Frame Construction | Aurum A 7.1 |
|---|---|
| Fork | RockShox Boxxer Select, Debonair, Charger RC, 200mm Travel |
| Rear Shock | Fox Performance Vanilla LSC, Coil Spring, S 350lb, M 400lb, L 450lb , XL 500lb Spring Weight |
Drivetrain
| Shifters | Shimano Zee, SL-M640, 10 speed |
|---|---|
| Rear Derailleur | Shimano Zee, RD-M640, short cage |
| Crankset | Raceface Chester, 165mm, 36T |
| Bottom Bracket | Race Face 83mm |
| Cassette | SRAM PG 1030, 10 speed 11-28T |
| Chain | KMC X10 |
Brakes
| Brakes | (F) SRAM Code R 4 Piston, Hydraulic, 200mm / (R) SRAM Code R 4 Piston, Hydraulic, 200mm |
|---|
Cockpit & Contact Points
| Headset | FSA 57E-1 |
|---|---|
| Handlebar | Norco 6061, 800mm, 20mm rise, 35mm bore |
| Stem | Race Face Chester DM 35, 50mm |
| Saddle | WTB Volt Sport |
| Seatpost | Norco 6061 alloy, 2-bolt head |
Wheels & Tires
| Hubs | (F) Novatech sealed bearing, 20x110mm / (R) SRAM MTH-746, sealed bearing, through axle |
|---|---|
| Rims | WTB ST I29 TCS 2.0, 27.5 |
| Front Tire | Maxxis Assegai 2.5" EXO/TR |
| Rear Tire | Maxxis Assegai 2.5" EXO/TR |
| Wheel Size | 27.5" |
Geometry
Frame measurements by size.
Published frame view
Select an available measurement to locate it on the frame.
All geometry measurements4 sizes · 17 measurements
| Measurement | S · 27.5" | M · 27.5" | L · 27.5" | XL · 27.5" |
|---|---|---|---|---|
| Seat tube | 400 mm | 420 mm | 440 mm | 460 mm |
| Effective top tube | 539 mm | 571 mm | 603 mm | 635 mm |
| Head tube | 100 mm | 110 mm | 120 mm | 130 mm |
| Head-tube angle | 63° | 63° | 63° | 63° |
| Seat-tube angle | 76.4° | 75.5° | 74.6° | 73.8° |
| Chainstay / rear center | 425 mm | 435 mm | 445 mm | 455 mm |
| Wheelbase | 1177 mm | 1211 mm | 1254 mm | 1280 mm |
| Bottom-bracket drop | -12 mm | -12 mm | -12 mm | -12 mm |
| Bottom-bracket height | 343 mm | 343 mm | 343 mm | 343 mm |
| Reach | 393 mm | 413 mm | 432 mm | 452 mm |
| Stack | 602 mm | 611 mm | 620 mm | 629 mm |
| Standover height | 682 mm | 688 mm | 695 mm | 704 mm |
| Fork offset / rake | 52 mm | 52 mm | 52 mm | 52 mm |
| Trail | 123 mm | 123 mm | 123 mm | 123 mm |
| Crank length | 165 mm | 165 mm | 165 mm | 165 mm |
| Stem length | 50 mm | 50 mm | 50 mm | 50 mm |
| Wheel size | 27.5" | 27.5" | 27.5" | 27.5" |
Measurements may vary by configuration, wheel size, or frame setting where noted in the published chart.
Gearing
Lower ratios provide more mechanical advantage for climbing. Higher ratios turn the rear wheel farther with each crank revolution.
Parts & serviceability
Find replacement parts
More parts (5)

Shimano ZEE SL-M640 Shifter One Color, RIGHT
RIGHT

Race Face Chester Stem Black, 8-Deg, 31.8x50mm
8-Deg, 31.8x50mm
Based on the original build. Confirm the model, size and fit before ordering; installed parts may differ. 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.
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: 2021 Norco Aurum A1 · Mountain · Published sizes: S, M, L, XL
Frame and fork
Inspect the frame and fork →Archived: Frame: Aurum A 7.1 · Fork: RockShox Boxxer Select, Debonair, Charger RC, 200mm Travel
Suspension
Evaluate the suspension →Archived: Fork: RockShox Boxxer Select, Debonair, Charger RC, 200mm Travel · Rear shock: Fox Performance Vanilla LSC, Coil Spring, S 350lb, M 400lb, L 450lb , XL 500lb Spring Weight
Drivetrain
Check drivetrain wear →Archived: Shifters: Shimano Zee, SL-M640, 10 speed · Rear derailleur: Shimano Zee, RD-M640, short cage · Crankset: Raceface Chester, 165mm, 36T · Bottom bracket: Race Face 83mm · Cassette: SRAM PG 1030, 10 speed 11-28T · Chain: KMC X10
Brakes
Inspect the brakes →Archived: Brakes: (F) SRAM Code R 4 Piston, Hydraulic, 200mm / (R) SRAM Code R 4 Piston, Hydraulic, 200mm
Wheels and tires
Check wheels and tires →Archived: Wheel size: 27.5" · Rims: WTB ST i29 TCS 2.0, 27.5 · Hubs: (F) Novatech sealed bearing, 20x110mm / (R) SRAM MTH-746, sealed bearing, through axle · Front tire: Maxxis Assegai 2.5" EXO/TR · Rear tire: Maxxis Assegai 2.5" EXO/TR
Controls and contact points
Archived: Headset: FSA 57E-1 · Handlebar: Norco 6061, 800mm, 20mm rise, 35mm bore · Stem: Race Face Chester DM 35, 50mm · Seatpost: Norco 6061 alloy, 2-bolt head · Saddle: WTB Volt Sport
Before and during the test ride
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.
