Surly Ogre Adventure Gravel Bike - 29", Steel, Fermented Plum - 210000055725

Surly Ogre Adventure Gravel Bike - 29", Steel, Fermented Plum - 210000055725

The Ogre can get you to your job during the week, then way out of town on the weekend. It’s not sluggish on pavement or gravel and can also hold its own on singletrack. Ogre brings several sensible features to the 29er platform, including horizontal slotted dropouts with Gnot-Boost spacing, a tweaked non-suspension corrected geometry, and a beefy tire clearance.

Features

• 100% Surly Chromoly steel, double-butted main triangle
• TIG-welded, Horizontal slotted with derailleur hanger, Gnot-Boost spacing allows the use of 135mm QR hub, 142 x 12mm thru-axle or 148 x 12mm Boost hubs. Features Rohloff torque arm slot and threaded eyelets for fenders, racks and Surly trailer mounts
• Full-length Surly Trip Guide housing line guides for derailleurs and brakes; two sets of bottle cage mounts; upper seatstay threaded barrels, mid- and low-blade fully threaded through-blade fork eyelets; threaded holes for racks, fenders and trailer mounting nuts; Rohloff OEM2 axle plate mounting slot
• Disc brakes only. Disc mounts are 51mm IS. Note: rear disc brake is limited to 160mm maximum rotor diameter and requires the use of Surly caliper adaptor (included with frames and bikes)
• Frame is E.D. coated for increased life expectancy
• Tire clearance for 29 x 2.5” or 27.5 x 3”

Specifications

Size Guide

What our Experts Think

• Built for Adventure: A true go-anywhere, do-anything machine – ideal for bikepacking, touring, and rugged commutes.

• Durable Steel Frame: Made with Surly's signature 4130 Chromoly steel for long-lasting performance and a smooth, compliant ride.

• 29" Wheels: Roll over rough terrain with confidence; compatible with wide tires for added grip and comfort.

• Versatile Mounting Options: Triple bottle mounts, rack/fender mounts, and plenty of cargo space – perfect for hauling gear on long trips.

• Reliable Drivetrain: Built to handle steep climbs and loaded rides with ease.

• Disc Brakes: All-weather stopping power for maximum control and safety on any terrain.

• Unique Colorway: Fermented Plum finish turns heads while standing up to the elements.

Q&A

Q: What is the Surly Ogre Adventure Bike best used for?
A: The Surly Ogre is built for adventure riding, bikepacking, gravel grinding, and commuting—on or off the grid.

Q: What wheel size does the Surly Ogre use?
A: It rolls on 29" wheels, ideal for stability, rollover, and long-distance comfort.

Q: What material is the frame made of?
A: 100% Chromoly steel for durability, strength, and a smooth ride feel.

Q: What makes the Fermented Plum color special?
A: It's a distinctive, eye-catching finish exclusive to this model year—rugged and unique.

Q: Does the Ogre support racks and fenders?
A: Yes! Full rack, fender, and multiple cargo mount compatibility for total gear hauling versatility.

Q: Is the Ogre compatible with suspension forks?
A: Yes, it's suspension-corrected and can handle a variety of fork options.

Q: Who is this bike ideal for?
A: Riders who crave off-road capability, long-distance comfort, and rugged reliability in a steel adventure bike.

Maintenance Tips

• Clean Regularly: Rinse off dirt and grime after rides, especially in wet or dusty conditions. Use bike-specific cleaner and a soft brush.

• Lubricate Chain: Apply chain lube every 100-150 miles or after wet rides. Wipe off excess to prevent grime buildup.

• Check Tire Pressure: Maintain 30–50 PSI for optimal gravel performance. Inspect for wear or punctures.

• Inspect Brakes: Check pad wear and alignment weekly. Replace when pads are thin or braking feels soft.

• Tighten Bolts: Regularly check stem, handlebar, and crank bolts to avoid loosening from vibration.

• Grease Contact Points: Apply grease to seatpost, headset, and bottom bracket every 3–6 months to prevent corrosion.

• Drivetrain Care: Clean and degrease drivetrain monthly for smooth shifting and extended component life.

• Store Indoors: Keep the bike in a dry, cool place to protect the steel frame and components from rust