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Velopedia Bicycle Archive
1999 GT Avalanche (02)
Original manufacturer specifications including Mountain Mix drivetrain, 26" wheels, geometry for 1 published size.
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What Velopedia knows
- Model year
- 1999
- Category
- Mountain
- Original MSRP
- $1,141.65
- Sizes
- 12.5", 14.5", 16", 18", 20"
- Colors
- Billet
- Geometry
- Legacy reference · Geometry context
- Record coverage
- 32 preserved details · archived image · original MSRP · preserved geometry
- Archive ID
- 82081
Model history 2 other years
Frameset
| Frame Construction | TIG-welded |
|---|---|
| Frame Material | 7000 aluminum, butted |
| Fork | Marzocchi Bomber Z-2 BAM, 3.3" travel |
| Fork Material | Aluminum, triple-clamp crown |
| Rear Shock | N/A |
Drivetrain
| Component Group | Mountain Mix |
|---|---|
| Shifters | Shimano Deore LX RapidFire SL |
| Front Derailleur | Shimano Deore LX |
| Rear Derailleur | Shimano Deore XT |
| Crankset | Shimano Deore LX, 22/32/44 teeth |
| Bottom Bracket | Shimano cartridge |
| BB Shell Width | 73mm English |
| Rear Cogs | 9-speed, 11 - 32 teeth |
| Chain | Shimano CN-HG72, 1/2 x 3/32" |
| Pedals | Time ATAC |
Brakes
| Brakes | Shimano Deore LX V-Brake brakes, Shimano Deore LX levers |
|---|
Cockpit & Contact Points
| Headset | 1 1/8" threadless Aheadset SAS |
|---|---|
| Handlebar | Titec Enduro HF |
| Handlebar Extensions | Not included |
| Stem | Azonic ORC |
| Saddle | SDG Comp Belair, chromoly rails |
| Seatpost | Aluminum micro-adjust |
Wheels & Tires
| Hubs | Front: GT suspension Q/R, Rear: Shimano Deore LX |
|---|---|
| Rims | Mavic X221, 28-hole/32-hole |
| Spokes | DT stainless steel, 2.0mm straight gauge |
| Spoke Nipples | Brass nipples |
| Front Tire | 26 x 1.95" Michelin Wild Gripper kevlar |
| Wheel Size | 26" wheels |
Historical reference geometry
Geometry
Historical model-level geometry recovered from Velopedia’s original archive database. The source does not identify which listed frame size this reference describes, so fit interpretation is intentionally limited and no size-normalized Archive Context is generated.
| Measurement | Legacy reference |
|---|---|
| Top tube | 575 mm |
| Head-tube angle | 70.5° |
| Seat-tube angle | 73.5° |
| Chainstay / rear center | 426 mm |
| Wheelbase | 1073 mm |
Geometry source: Historical archive database — model-level reference geometry. The historical source provides one model-level geometry set and does not identify the corresponding frame size.
Geometry tools
Explore this historical geometry
Model-level historical reference
Period context: At 70.5°, the head angle sits somewhat slacker than typical among mountain geometries represented in Velopedia for this period. Its 73.5° seat angle is somewhat steeper than typical among the same-period mountain references.
Compared with 1159 distinct legacy mountain geometries from model years 1997–2001. Only angular measurements are used because the historical reference frame size is unidentified.See it in periodOpen an immediate comparison with preserved 1999 mountain geometries. The source frame size remains unidentified.
See its 1999 geometry context Parts & serviceability
Find replacement parts
Shimano CN-HG72, 1/2 x 3/32"
Exact archived model
26x1.95" Michelin Wild Gripper kevlar
Named tire and published size
Linear-pull brake pads
Published brake type — verify pad mounting style
More qualified parts (5)
SDG Comp Belair, chromoly rails
Named archived component — verify exact version
Shimano Deore LX, 22/32/44 teeth
Named archived component — verify exact version
Shimano Deore LX
Interpreted as Shimano Deore LX · 9-speed · mechanical Named component · published drivetrain speed — verify exact version
Shimano Deore XT
Interpreted as Shimano Deore XT · 9-speed · mechanical Named component · published drivetrain speed — verify exact version
Shimano Deore LX RapidFire SL
Interpreted as Shimano Deore LX · 9-speed · mechanical Named component · published drivetrain speed — verify exact version
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 →
- BrakesInspect pad condition, cable movement and the rim sidewalls or brake tracks for wear. A concave or heavily worn braking surface can mean the wheel also needs replacement.Inspect the brakes →
- SuspensionAsk when the fork was last serviced. Check the stanchions for damage, look for oil at the seals and make sure the fork moves smoothly without bushing play.Evaluate the suspension →
- DrivetrainShift through every gear under light load and measure chain wear. Confirm that the shifter, derailleur, chain and cassette belong to the same 9-speed system.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 20 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: 1999 GT Avalanche (02) · Mountain bike, front suspension · Published sizes: 12.5", 14.5", 16", 18", 20"
Frame and fork
Inspect the frame and fork →Archived: Frame: TIG-welded · Fork: Marzocchi Bomber Z-2 BAM, 3.3" travel · Aluminum, triple-clamp crown
Suspension
Evaluate the suspension →Archived: Fork: Marzocchi Bomber Z-2 BAM, 3.3" travel
Drivetrain
Check drivetrain wear →Archived: Group: Mountain Mix · Shifters: Shimano Deore LX RapidFire SL · Front derailleur: Shimano Deore LX · Rear derailleur: Shimano Deore XT · Crankset: Shimano Deore LX, 22/32/44 teeth · Bottom bracket: Shimano cartridge · Rear cogs: 9-speed, 11 - 32 teeth · Chain: Shimano CN-HG72, 1/2 x 3/32"
Brakes
Inspect the brakes →Archived: Brakes: Shimano Deore LX V-Brake brakes, Shimano Deore LX levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 26" wheels · Rims: Mavic X221, 28-hole/32-hole · Hubs: Front: GT suspension Q/R, Rear: Shimano Deore LX · Front tire: 26 x 1.95" Michelin Wild Gripper kevlar
Controls and contact points
Archived: Headset: 1 1/8" threadless Aheadset SAS · Handlebar: Titec Enduro HF · Stem: Azonic ORC · Seatpost: Aluminum micro-adjust · Saddle: SDG Comp Belair, chromoly rails · Pedals: Time ATAC
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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Recently checked marketplace data
Market Snapshot
Velopedia did not find a close used eBay listing in the latest snapshot. New and used listings remain separate.
Evidence standard
Fixed-price and Best Offer item prices only
Shipping and tax excluded
Active asks, not completed sales
No close current matches found. Velopedia did not find an eBay listing confident enough to include in the latest snapshot.
Listings shown have not passed their eBay-supplied end time. Velopedia rechecks matched bicycles on a protected weekly cycle; availability can still change between checks. Price calculations use active fixed-price and Best Offer item prices before shipping and tax. Auction bids, auction-only prices, classified ads, lower-confidence Review candidates and ended listings are excluded. These observations are not completed-sale prices, a certified appraisal or a guarantee of value.
Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.