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2020 Rocky Mountain Thunderbolt Carbon 90

Launched at $6,899Lists today at $6,899 (2026-09)

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What a used one is worth

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New

$3,547

$2,241 to $4,320

Like new

$3,369

$2,129 to $4,104

Excellent

$3,192

$2,017 to $3,888

Good

$2,660

$1,680 to $3,240

Fair

$1,951

$1,232 to $2,376

For parts

$1,064

$672 to $1,296

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: 2020
Category: Mountain · trail
Frame material: carbon
Sizes: XS, S, M, L, XL
Wheel size: 27.5
Launch MSRP (US): $6,899
Current list price: $6,899 (as of 2026-09)

Drivetrain

Speeds: 12
Groupset: Shimano XTR
Electronic: false

Build

Fork: Fox 34 Float Factory 140mm 37mm Offset
Stem: Rocky Mountain 35 CNC
Tires: Maxxis Minion DHR II WT Maxx Terra 3C Tubeless Ready 27.5 x 2.4 / Maxxis Minion DHR II WT Maxx Terra 3C Tubeless Ready 27.5 x 2.4
Brakes: Shimano XTR 2 Piston / Shimano RT86 180mm / Shimano RT86 180mm
Saddle: WTB Volt Race 142
Wheels: Race Face ARC 30 rims; hubs: Rocky Mountain Sealed Boost 15mm / DT Swiss 350 Boost 148mm
Cassette: Shimano XTR 12s 10-51T
Crankset: Race Face Next R Cinch 34T
Seatpost: Race Face Turbine R (by Fox) Dropper 30.9mm
Shifters: Shimano XTR
Handlebar: Race Face Next R 780mm
Weight kg: 12.43
Rear shock: Fox Float DPS EVOL Factory
Travel rear mm: 140
Rear derailleur: Shimano XTR
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

Launch price read from Rocky Mountain's US model-year page captured 2019-08 (inside the model year). Geometry is the Neutral position of the adjustable geometry chip. 2 factory colorways.

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