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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"

Manufacturer catalog

Published sizes and colors

4 sizes · 1 color

Manufacturer-published sizes and colors; availability and exact size/color pairings may vary by market or production run.

Published sizes

SMLXL

Published colors

Red

Frameset

Frame ConstructionAurum A 7.1
ForkRockShox Boxxer Select, Debonair, Charger RC, 200mm Travel
Rear ShockFox Performance Vanilla LSC, Coil Spring, S 350lb, M 400lb, L 450lb , XL 500lb Spring Weight

Drivetrain

ShiftersShimano Zee, SL-M640, 10 speed
Rear DerailleurShimano Zee, RD-M640, short cage
CranksetRaceface Chester, 165mm, 36T
Bottom BracketRace Face 83mm
CassetteSRAM PG 1030, 10 speed 11-28T
ChainKMC X10

Brakes

Brakes(F) SRAM Code R 4 Piston, Hydraulic, 200mm / (R) SRAM Code R 4 Piston, Hydraulic, 200mm

Cockpit & Contact Points

HeadsetFSA 57E-1
HandlebarNorco 6061, 800mm, 20mm rise, 35mm bore
StemRace Face Chester DM 35, 50mm
SaddleWTB Volt Sport
SeatpostNorco 6061 alloy, 2-bolt head

Wheels & Tires

Hubs(F) Novatech sealed bearing, 20x110mm / (R) SRAM MTH-746, sealed bearing, through axle
RimsWTB ST I29 TCS 2.0, 27.5
Front TireMaxxis Assegai 2.5" EXO/TR
Rear TireMaxxis Assegai 2.5" EXO/TR
Wheel Size27.5"

Geometry

4 sizes · 17 measurements

Frame measurements by size.

All geometry measurements4 sizes · 17 measurements
MeasurementS · 27.5"M · 27.5"L · 27.5"XL · 27.5"
Seat tube400 mm420 mm440 mm460 mm
Effective top tube539 mm571 mm603 mm635 mm
Head tube100 mm110 mm120 mm130 mm
Head-tube angle63°63°63°63°
Seat-tube angle76.4°75.5°74.6°73.8°
Chainstay / rear center425 mm435 mm445 mm455 mm
Wheelbase1177 mm1211 mm1254 mm1280 mm
Bottom-bracket drop-12 mm-12 mm-12 mm-12 mm
Bottom-bracket height343 mm343 mm343 mm343 mm
Reach393 mm413 mm432 mm452 mm
Stack602 mm611 mm620 mm629 mm
Standover height682 mm688 mm695 mm704 mm
Fork offset / rake52 mm52 mm52 mm52 mm
Trail123 mm123 mm123 mm123 mm
Crank length165 mm165 mm165 mm165 mm
Stem length50 mm50 mm50 mm50 mm
Wheel size27.5"27.5"27.5"27.5"

Measurements may vary by configuration, wheel size, or frame setting where noted in the published chart.

Gearing

Chainring ÷ rear sprocket

Lower ratios provide more mechanical advantage for climbing. Higher ratios turn the rear wheel farther with each crank revolution.

All published sizes36T · 11–28T · 10-speed
Lowest1.29:1 Highest3.27:1 Total range255%
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Parts & serviceability

Find replacement parts

Original specifications
Chain · Original
KMC X10
Cassette · Original
SRAM PG 1030, 10 speed 11-28T
Saddle · Original
WTB Volt Sport
More parts (5)
Rear derailleur · Original
Shimano Zee, RD-M640, short cage Search: Shimano RD-M640 rear derailleur
Shifters · Original
Shimano Zee, SL-M640, 10 speed Search: Shimano SL-M640 shifter
Retailer offers · Affiliate links
Stem · Original
Race Face Chester DM 35, 50mm
Retailer offers · Affiliate links
Headset · Original
FSA 57E-1
Rims · Original
WTB ST i29 TCS 2.0, 27.5

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
0 of 22 checked Progress stays in this browser for this bike.

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.

Archived: 2021 Norco Aurum A1 · Mountain · Published sizes: S, M, L, XL

Archived: Frame: Aurum A 7.1 · Fork: RockShox Boxxer Select, Debonair, Charger RC, 200mm Travel

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

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

Archived: Brakes: (F) SRAM Code R 4 Piston, Hydraulic, 200mm / (R) SRAM Code R 4 Piston, Hydraulic, 200mm

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

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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.

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