Surly Karate Monkey Steel MTB Frame 27.5/29 Hi-Vis Black

The Surly Karate Monkey Frame redefines trail versatility with its adaptable design and rugged build quality, perfect for riders craving freedom on diverse terrain. Crafted from premium 100% Surly 4130 chromoly steel—featuring precision-engineered double-butted tubing in the main triangle—this frame balances strength with smooth compliance over rough trails while maintaining responsive handling on technical sections. Its 44mm headtube ensures stability during aggressive cornering, making it ideal for all-day epics or weekend adventures where confidence matters most.

At its core lies Surly’s innovative Gnot-Boost rear dropout system, which seamlessly accommodates modern drivetrains (including 1x setups) and wheel configurations—from 27.5″ to 29″ tires (up to 2.55″/27.5×3″)—without sacrificing clearance or performance. This adaptability lets riders future-proof their build while tackling everything from loose descents to gnarly climbs with ease. An internal dropper seatpost routing system keeps cables tidy while prioritizing rider comfort during extended rides, paired with a 30.9mm seat tube diameter for precise fitment across post sizes.

Whether you’re an endurance-focused trail rider seeking a durable platform or a weekend warrior craving flexibility in your setup, the Karate Monkey’s blend of classic steel reliability and modern geometry makes it stand out against competitors limited by fixed spacing or narrower tire envelopes. Unlike frames constrained to specific wheel sizes or drivetrain setups, this design empowers riders to customize their rig for any challenge while maintaining sharp handling and all-day comfort—no compromises required.

Key Advantages vs Competitors
| Feature | Karate Monkey | Competitor X |
|————————|—————————-|———————–|
| Wheel Compatibility | 27.5/29″ with Gnot-Boost | Limited to 29″ only |
| Dropout System | Adjustable Gnot-Boost | Fixed 148mm spacing |
| Tire Clearance | Up to 3″ on 27.5″ | Max 2.8″ |
| Material Quality | Premium 4130 chromoly | Standard chromoly |

Designed for riders who refuse to choose between versatility and performance, the Karate Monkey delivers unmatched adaptability without sacrificing trail-ready toughness—making it a standout choice for those who demand more from their mountain bike build.*