Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
GT
2018 GT Avalanche Sport
Value Guide market data · 2018 GT Avalanche Sport
12-month trend
7%
Direction and magnitude, not judgment
vs. category average
— %
No category comparison available
Price over time - 2018 GT Avalanche Sport
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Avalanche model years
2024$1,256 - $1,458▲ 80% vs. 2018
2022$1,279 - $1,485▲ 83% vs. 2018
2021$1,000 - $1,161▲ 43% vs. 2018
2020$767 - $891▲ 10% vs. 2018
2019$744 - $864▲ 7% vs. 2018
2018$698 - $810Currently viewing
2016$791 - $918▲ 13% vs. 2018
2015$865 - $1,004▲ 24% vs. 2018
2014$707 - $821▲ 1% vs. 2018
2013$977 - $1,134▲ 40% vs. 2018
2012$1,023 - $1,188▲ 47% vs. 2018
2011$1,488 - $1,728▲ 113% vs. 2018
2010$1,209 - $1,404▲ 73% vs. 2018
2009$1,209 - $1,404▲ 73% vs. 2018
2008$744 - $864▲ 7% vs. 2018
2006$977 - $1,134▲ 40% vs. 2018
2005$930 - $1,080▲ 33% vs. 2018
2003$836 - $971▲ 20% vs. 2018
2002$437 - $508▼ 37% vs. 2018
2001$1,116 - $1,296▲ 60% vs. 2018
2000$1,214 - $1,409▲ 74% vs. 2018
1998$1,455 - $1,690▲ 109% vs. 20181996$1,418 - $1,647▲ 103% vs. 20181995$1,088 - $1,264▲ 56% vs. 20181994$1,059 - $1,230▲ 52% vs. 20181993$1,134 - $1,317▲ 63% vs. 20182018 Avalanche Sport lineup
Overview
About this bike
2018 GT Avalanche Sport value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Fork
- SR Suntour XCM-HLO w/ 100mm travel, steel stanchions, aluminum legs, post mount disc brake, hydraulic lockout
- Frame
- 6061 T6 aluminum Triple Triangle, replaceable derailleur hanger, zerostack tapered 1 1/8-1.5 head tube, 27.5/29 design
Drivetrain
- Groupset
- 2018 GT Avalanche Sport
- Crankset
- All Terra V-401
- Bottom Bracket
- VP cartridge sealed
- Chain
- KMC Z99
- Front Derailleur
- Shimano Acera, FD-M370
- Rear Derailleur
- Shimano, Alivio, RD-M4000
- Cassette/Rear Cogs
- Sunrace CS-M90, 11-34t, 9-speed
- Chainrings
- 44/32/22
- Shifters
- Shimano SL-M2000
Brakes
- Brake Levers
- Shimano
- Brakes
- Shimano BR-M315 hydraulic disc, 160mm rotors
Cockpit
- Saddle
- All Terra MTB
- Headset
- Integrated sealed bearing, 1-1/8 upper + 1.5 lower
- Stem
- All Terra 1 1/8" threadless, 4-bolt w/ CNC face plate, 10° rise for 27.5; 5° rise for 29, 31.8mm clamp
- Handlebars
- 6061 aluminum riser, 680mm width, 12mm rise, 31.8mm clamp, double butted
- Seat Post
- All Terra alloy micro-adjust, 30.9mm
- Tape/Grips
- GT Statement
Wheels & Tires
- Hubs
- Alloy disc
- Tires
- All Terra Cypher, 30tpi<br>X-Small–Small: 27.5 x 2.30<br>Med–X-Large: 29 x 2.30
- Spokes
- 14g stainless
Pedals
- Pedals
- GT Slim Line flat nylon
Accessories
- Rims/Wheels
- All Terra double wall, disc specific
Frame sizing
XS4'10"-5'2"
S5'2"-5'6"
M5'6"-5'10"
L5'10"-6'2"
XL6'2"-6'6"
M highlighted as most common resale size. Sourced from catalog metadata.
Geometry
- Stack
- Varies by size
- Reach
- Varies by size
- Wheelbase
- Varies by size
Industry standard. Sourced from catalog metadata.
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Wheel condition
Inspect rims, hubs, spokes, and bearing play; ask about the tire age and any prior wheel rebuilds.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.
Inspection
Suspension service
Confirm fork lowers and rear shock service intervals; ask for the most recent service receipts.
Inspection
Frame pivots & bearings
Cycle the suspension off the bike to feel for play, grit, or noise in pivot bearings.