MountainPartial spec

2018 Rocky Mountain Thunderbolt Carbon 90 BC Edition

Lists today at $5,999 (2026-09)

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What a used one is worth

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New

$2,610

$1,578 to $3,249

Like new

$2,480

$1,499 to $3,086

Excellent

$2,349

$1,420 to $2,924

Good

$1,958

$1,184 to $2,436

Fair

$1,436

$868 to $1,787

For parts

$783

$473 to $975

From the launch price, aged to 2026 and adjusted for condition. Guidance from our catalog, not an appraisal.

Overview

Brand: Rocky Mountain
Model family: Thunderbolt
Model year: 2018
Category: Mountain · trail
Frame material: carbon
Sizes: XS, S, M, L, XL
Wheel size: 27.5
Current list price: $5,999 (as of 2026-09)

Drivetrain

Speeds: 12
Groupset: SRAM GX Eagle
Electronic: false

Build

Fork: Fox 36 Float Performance Elite 140mm
Stem: Rocky Mountain 35 CNC
Tires: Maxxis Minion DHF Maxx Terra 3C Tubeless Ready 27.5 x 2.3 / Maxxis Minion DHR II Maxx Terra 3C Tubeless Ready 27.5 x 2.3
Brakes: Sram Guide RS
Saddle: WTB Silverado Race
Wheels: Stans Arch MK3 Tubeless Ready - Tape | Valves Incl rims; hubs: Rocky Mountain Sealed Boost 15mm / DT Swiss 350 Boost 148mm
Cassette: Sram XG-1275 10-50T
Crankset: Sram Stylo 7k Eagle 34T
Seatpost: Fox Transfer Performance Elite 30.9mm
Shifters: Sram GX Eagle
Handlebar: Race Face Turbine R 780mm
Weight kg: 12.57
Rear shock: Fox Float DPS EVOL Performance Elite
Travel rear mm: 140
Rear derailleur: Sram GX Eagle
Travel front mm: 140

Geometry

L: Reach mm: 459; Stack mm: 607; Chainstay mm: 425; Wheelbase mm: 1188; Head angle deg: 66.6; Seat angle deg: 74.6
M: Reach mm: 436; Stack mm: 598; Chainstay mm: 425; Wheelbase mm: 1161; Head angle deg: 66.6; Seat angle deg: 74.6
S: Reach mm: 414; Stack mm: 588; Chainstay mm: 425; Wheelbase mm: 1135; Head angle deg: 66.6; Seat angle deg: 74.6
XL: Reach mm: 485; Stack mm: 621; Chainstay mm: 425; Wheelbase mm: 1220; Head angle deg: 66.6; Seat angle deg: 74.6
XS: Reach mm: 386; Stack mm: 579; Chainstay mm: 425; Wheelbase mm: 1103; Head angle deg: 66.6; Seat angle deg: 74.6

list_price_usd is the price Rocky Mountain's archive page shows today; no in-season capture confirmed it as the launch price. Geometry is the Neutral position of the adjustable geometry chip. 2 factory colorways.

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