Rocky Mountain Growler Jr 20 Bike 2026 Red / Blue / Black

The Rocky Mountain Growler Jr 20 Bike pairs a 6061 alloy frame with a Suntour XCT JR fork at 63mm travel. Shimano QC300 hubs, SunRace drivetrain components, and a Tektro HD-J285 brake system keep things responsive across mixed terrain. A 28T crank with 11-40T cassette helps manage climbs and faster sections.

Key Features

• Wheel Size: 20"
• Front Travel: 60mm
• Frame: Rocky Mountain 6061 Alloy | Threaded BB | Zerostack Headtube | Dropper Post Compatible
• Fork: Suntour XCT JR 63mm
• Headset: Rocky Mountain | Loose Ball Bearings | 1-1/8" Crown Race
• Stem: Rocky Mountain 31.8 XC | 7° Rise | All Sizes = 40mm
• Handlebar: Rocky Mountain Jr | 600mm Width | 25mm rise | 9° Backsweep | 5° Upsweep | 31.8 | For 19mm Grips
• Grips: Rocky Mountain Lock On Jr 19mm
• Brakes: Tektro HD-J285 | Short Reach Lever | Shimano Pad Compatible
• Shifters: SunRace DLM403 Trigger
• Rear Derailleur: SunRace RDM903 With Clutch
• Cranks & Chainring: Rocky Mountain Microdrive 3PC | 28T | Sram 76mm BCD | Crank Length: 127mm
• Bottom Bracket: Sealed Cartridge Bearing
• Cassette: SunRace CSM680 11-40T
• Chain: KMC Z8.3
• Front Hub: Shimano QC300
• Rear Hub: Shimano QC300
• Spokes: 2.0 Stainless
• Rims: Rocky Mountain JR30 | 32H
• Tires: Kenda Kadre 20 x 2.6 | Kenda Amrak 20 x 2.4
• Seatpost: Rocky Mountain Pivotal 30.9mm
• Saddle: Rocky Mountain Pivotal Jr