Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
GT
2013 GT Bump
Value Guide market data · 2013 GT Bump
12-month trend
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Price over time - 2013 GT Bump
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Bump model years
2013 Bump lineup
Overview
About this bike
2013 GT Bump value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Fork:
- GT Dirt/Street Design, Hi-Ten 31.8- 28.6mm Tapered O.D. Blades, Cr-Mo Steerer, 320mm A/C, 3/8" axle
Drivetrain
- Groupset
- 2013 GT Bump
- Chain:
- KMC Z410
- Crank:
- GT Tubular Cr-Mo 3Pc., 175mm Arms, Cold Forged Cr-Mo 19mm x 8T Spline Spindle, 5mm 25T GT AL Chain Wheel
- Bottom Bracket:
- MID Sealed Bearing
- Bottom Bracket
- 68mm English
Brakes
- Brake Levers:
- Tektro XL320 Alloy
Cockpit
- Handlebar:
- GT 100% Cr-Mo, 690mm Width, 210mm Rise, 11 Degree Sweep, 3 Degree Tip, Taper Cross Bar
- Stem:
- GT Top Load Design With Cold Forged Clamp, 50mm Ext
- Grips:
- GT Wings Logo 130mm Single Compound
- Headset:
- FPD, 1 1/8" Integrated Design 45 x 45 Degree Sealed Bearings
- Saddle:
- GT Dirt Design Unifed Padded Saddle w/ Post
- Seat Post:
- Integrated With Saddle, 135mm
- Seat Clamp:
- Alloy, single bolt
Wheels & Tires
- Rims:
- Alienation, Black Sheep F/R, Double Wall 32F/36R Hole
- Tires:
- GT Sandbox Dirt Tread 20"x2.1" F/R
- Hubs:
- GT Alloy Body, Sealed Bearing 3/8" Cr-Mo Axle, 32 Hole
- Rear Hub:
- Sealed Bearing 14mm 9T Cassette 36 Hole
- Spokes:
- 14G
- Nipples:
- Brass
Pedals
- Pedals:
- GT Low Profile Large Size Platform Design, PP Material, Boran Axle
Accessories
- Cog Set:
- 9T One Piece Driver
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.