Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Rocky Mountain
2018 Rocky Mountain Thunderbolt Alloy 50
Value Guide market data · 2018 Rocky Mountain Thunderbolt Alloy 50
12-month trend
8%
Direction and magnitude, not judgment
vs. category average
— %
No category comparison available
Price over time - 2018 Rocky Mountain Thunderbolt Alloy 50
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Thunderbolt model years
2018 Thunderbolt Alloy 50 lineup
Overview
About this bike
2018 Rocky Mountain Thunderbolt Alloy 50 value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Rear Shock
- Fox Float DPS EVOL Performance 120 mm
- Fork
- Fox 34 Float Performance 130mm
- Frame
- FORM Alloy. BC2 / ABC Pivots. Full Sealed Cartridge Bearing Main Pivot. Press Fit BB. Internal Cable Routing. RIDE-9 Adjustable Geometry + Suspension Rate
Drivetrain
- Groupset
- 2018 Rocky Mountain Thunderbolt Alloy 50
- Crankset
- Race Face Aeffect Cinch Steel
- Bottom Bracket
- Race Face BB92
- Chain
- SRAM PC-1110
- Rear Derailleur
- SRAM GX
- Cassette/Rear Cogs
- SRAM PG-1130 11-42T
- Chainrings
- 32T
- Shifters
- SRAM GX
Brakes
- Brakes
- SRAM Level T 180mm
Cockpit
- Saddle
- WTB Volt Race
- Headset
- FSA Orbit NO.57E
- Stem
- Rocky Mountain AM
- Handlebars
- Rocky Mountain AM 760mm
- Seat Post
- Race Face Aeffect Dropper 30.9mm
- Tape/Grips
- Rocky Mountain Lock On Light
Wheels & Tires
- Hubs
- Rocky Mountain Sealed Boost 15mm / SRAM MTH 746 142mm
- Tires
- Maxxis Minion DHR II Folding 27.5 x 2.3 / Maxxis Crossmark II 27.5 x 2.25
- Axles
- Front: 15 x 110mm<br>Rear: 12 x 148mm
- Spokes
- WTB 2.0-1.8
Accessories
- Rims/Wheels
- Sun Helix TR25 SL Tubeless Compatible - Tape / Valves / Sealant Not Incl
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.