Marin Bolinas Ridge 1 27.5"

Entry-Level Recreational Hardtail · 27.5"/29"

Your entry point to Marin mountain biking. Disc-specific Series 1 6061 aluminum frame, 100mm of fork travel, and real MTB tires in a lightweight, confident-handling package. The BR1 runs a Shimano Tourney 3x7 drivetrain with Power CX7 mechanical discs — rugged, fixable, and ready for trails, paths, and fire roads. Size-appropriate 27.5" (S/M) or 29" (M/L/XL) wheels keep fit dialed across the range.

At a Glance

• Frame: Series 1 6061 Aluminum, 27.5"/29" Wheels (size-dependent), Low Standover, 68mm BB, 135mm Forged Dropouts, Chainstay-Mounted Disc
• Fork: SR Suntour XCE Disc, 100mm Travel, Preload Adjustment, 46mm Offset
• Rear Derailleur: Shimano Tourney, 7-Speed
• Brakes: Power CX7 Mechanical Disc, 160mm rotors
• Rims: Marin, Double Wall Alloy

Full Specifications