Velopedia Bicycle Archive

2020 Giant Reign SX 29

Original manufacturer specifications including geometry for 4 published sizes.

Share owner experience

Selling this bike? Create a shareable bike record

What Velopedia knows

Model year
2020
Category
Mountain
Original MSRP
$4,000.00
Sizes
S, M, L, XL
Colors
Biking Red
Geometry
4 manufacturer sizes · Geometry context
Record coverage
22 preserved details · archived image · original MSRP · preserved geometry
Archive ID
900002408

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

Biking Red

Frameset

Frame ConstructionALUXX SL-Grade Aluminum, 146mm
Frame MaterialAluminum
ForkFox 36 Performance Elite, GRIP2, 170mm,110x15 Kabolt, tapered
Rear ShockFox DHX2 Performance Elite

Drivetrain

ShiftersSRAM NX Eagle
Front DerailleurN/A
Rear DerailleurSRAM NX Eagle
CranksetTruVativ Descendent 6k Eagle DUB, 32t with MRP alloy guide
Bottom BracketSRAM DUB, press fit
CassetteSRAM NX Eagle, 11x50
ChainSRAM NX Eagle
PedalsN/A

Brakes

BrakesSRAM Code R

Cockpit & Contact Points

HandlebarGiant Contact SL TR35, 800x35mm, 20mm rise
StemGiant Contact SL 35
SaddleGiant Contact (neutral)
SeatpostGiant Contact Switch dropper post with remote, 30.9

Wheels & Tires

Hubs[F] Giant Tracker Performance Boost 15x110, sealed bearing [R] Giant Tracker Performance Boost 12x148, sealed bearing
RimsGiant AM 29, tubeless ready sleeve-joint rim, 30mm inner width
SpokesSapim
Front Tire[F] Maxxis Minion DHF 29x2.5 WT, EXO, TR [R] Maxxis Minion DHR II 29x2.4 WT, EXO, TR, tubeless
Rear Tire[F] Maxxis Minion DHF 29x2.5 WT, EXO, TR [R] Maxxis Minion DHR II 29x2.4 WT, EXO, TR, tubeless

Size-specific frame data

Geometry

4 sizes · 17 measurements

Manufacturer-published geometry normalized for consistent archival comparison. Effective top tube and reach remain separate measurements because they describe different aspects of fit.

MeasurementSMLXL
Seat tube431 mm431 mm464 mm496 mm
Top tube574 mm601 mm640 mm666 mm
Head tube100 mm110 mm110 mm120 mm
Head-tube angle64.5°64.5°64.5°64.5°
Seat-tube angle76.3°76.3°76.3°76.3°
Chainstay / rear center439 mm439 mm439 mm439 mm
Wheelbase1191 mm1220 mm1262 mm1289 mm
Bottom-bracket drop27 mm27 mm27 mm27 mm
Reach423 mm451 mm488 mm511 mm
Stack622 mm622 mm631 mm640 mm
Standover height757 mm759 mm781 mm804 mm
Fork offset / rake44 mm44 mm44 mm44 mm
Trail133 mm133 mm133 mm133 mm
Crank length165 mm170 mm170 mm170 mm
Stem length40 mm40 mm40 mm50 mm
Handlebar width800 mm800 mm800 mm800 mm
Wheel size29"29"29"29"

Geometry source: Giant first-party size geometry table ↗ Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.

Geometry tools

Analyze a published size

Choose a size

S geometry

Archive context: Its trail of 133 mm sits toward the higher-trail end. Its wheelbase of 1191 mm sits toward the longer end. The head angle of 64.5° sits toward the slacker end.

Compared with 87 distinct mountain geometries in the Small-equivalent size cohort from model years 2018–2022 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 S geometry

Parts & serviceability

Find replacement parts

1 top part search
Bottom bracketQualified part search
SRAM DUB, press fit Named archived component — verify dimensions

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. 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 →
  • BrakesTest each brake separately and confirm it stops firmly and releases cleanly. Inspect the pads and braking surfaces for wear or contamination, and check the cables or hoses for damage.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 →
  • DrivetrainShift through the full range under light load, measure chain wear and inspect the cassette or freewheel teeth. Skipping or hesitation can indicate wear, poor adjustment or mismatched parts.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. If it is set up tubeless, confirm both tires hold pressure and ask when the sealant was last refreshed.Check wheels and tires →
Bike-specific inspection checklist 23 checks based on 6 archived component groups Open checklistClose checklist
0 of 23 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: 2020 Giant Reign SX 29 · Mountain · Published sizes: S, M, L, XL

Archived: Frame: ALUXX SL-Grade Aluminum, 146mm · Fork: Fox 36 Performance Elite, GRIP2, 170mm,110x15 Kabolt, tapered

Archived: Fork: Fox 36 Performance Elite, GRIP2, 170mm,110x15 Kabolt, tapered · Rear shock: Fox DHX2 Performance Elite

Archived: Shifters: SRAM NX Eagle · Rear derailleur: SRAM NX Eagle · Crankset: TruVativ Descendent 6k Eagle DUB, 32t with MRP alloy guide · Bottom bracket: SRAM DUB, press fit · Cassette: SRAM NX Eagle, 11x50 · Chain: SRAM NX Eagle

Archived: Brakes: SRAM Code R

Archived: Rims: Giant AM 29, tubeless ready sleeve-joint rim, 30mm inner width · Hubs: [F] Giant Tracker Performance Boost 15x110, sealed bearing [R] Giant Tracker Performance Boost 12x148, sealed bearing · Front tire: [F] Maxxis Minion DHF 29x2.5 WT, EXO, TR [R] Maxxis Minion DHR II 29x2.4 WT, EXO, TR, tubeless · Rear tire: [F] Maxxis Minion DHF 29x2.5 WT, EXO, TR [R] Maxxis Minion DHR II 29x2.4 WT, EXO, TR, tubeless

Controls and contact points

Archived: Handlebar: Giant Contact SL TR35, 800x35mm, 20mm rise · Stem: Giant Contact SL 35 · Seatpost: Giant Contact Switch dropper post with remote, 30.9 · Saddle: Giant Contact (neutral)

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.

My Garage

Velopedia

Enter your email and Velopedia will send a private sign-in link. No password required.

Have you owned this bike?Help preserve its real-world history by sharing your owner experience.

Share the details that would help another rider understand how this model fits, rides and holds up over time. Velopedia reviews every contribution before publication.

Add fit, maintenance and buyer detailsOptional · five additional fields

Your contribution goes directly to Velopedia’s private review queue. We’ll email an optional confirmation link plus a private edit and withdrawal link, but you do not need to confirm your email before an administrator can review or approve the submission.

Already contributed? Send me a fresh private edit link

For privacy, Velopedia shows the same confirmation whether or not an experience exists.

Current market

Snapshot not yet available
Protected live updateReady after page interactionAutomated crawlers do not trigger marketplace requests.

Move, scroll, tap or type to start the protected update.

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

Scroll to Top