S&M BMX RAMBLER BIG LINCOLN FRAME

Product Overview

The S&M BMX Rambler Big Lincoln Frame is Lukas Halahan's signature trail frame built with oversized, butted chromoly tubing for riders who want maximum strength and confidence on jumps and technical terrain. Featuring a mellower 74° head tube angle and adjustable 14.25″–15″ rear end length, this frame is designed for trail and dirt jump riders who prioritize stability and a slightly more relaxed ride feel. Made in the USA with S&M's Thermal-X butted tubeset for durability without excessive weight.

Key Features

• Butted Thermal-X tubeset – Oversized, butted chromoly tubing provides increased strength and impact resistance in critical areas while keeping weight at 5.4 lb; ideal for riders who session big jumps and rough trails
• 74° head tube angle – Slightly slacker geometry delivers more stable, predictable handling at speed and on steep landings compared to steeper street-oriented frames
• Adjustable 14.25″–15″ rear end – Horizontal dropout slots allow you to fine-tune backend length for your riding style; shorter for quicker handling, longer for more stability
• 5″ integrated head tube (45°/45°, 41.8mm) – Tall integrated design accommodates taller riders and provides additional standover clearance for aggressive trail riding
• Integrated seat clamp – Built-in clamp eliminates the need for an external collar, reducing weight and simplifying the frame's appearance
• Welded chainstay 990 brake mounts – Clean, strong brake mount integration for riders running rear brakes on trails or in parks
• 14mm slot dropouts with 4Q-Baked treatment – Heat-treated dropouts provide exceptional strength and durability; slots allow chain tensioning and rear end adjustment
• Made in the USA – Manufactured domestically with consistent quality control and precise welding

Technical Specifications

• Top tube lengths: 21″, 21.25″, 21.5″, 22″
• Rear end length: 14.25″–15″ (adjustable via horizontal dropouts)
• Head tube angle: 74°
• Seat tube angle: 71°
• Standover height: 9.25″
• Bottom bracket height: 11.47″
• Head tube: 5″ integrated (45°/45°, 41.8mm)
• Bottom bracket: Mid (19mm ID)
• Seat clamp: Integrated
• Seat post size: 1″ / 25.4mm
• Brake mounts: Welded chainstay 990
• Dropouts: 14mm slot, 4Q-Baked heat treatment
• Gyro tabs: None
• Weight: 5.4 lb (2.45 kg)
• Tubeset: Butted Thermal-X (oversized chromoly)

Compatibility and Ideal Use Cases

This frame fits 14mm axles, mid bottom brackets, integrated headsets (45°/45°, 41.8mm), and 1″ seatposts. The welded chainstay mounts accept 990-style brakes. With its slacker 74° head angle, adjustable rear end, and beefy Thermal-X tubeset, the Rambler Big Lincoln is optimized for trail riding, dirt jumping, and park sessions where stability and strength matter more than ultra-quick handling. The range of top tube lengths and tall standover make it suitable for a variety of rider sizes who want a confidence-inspiring frame for sending bigger jumps and riding rougher terrain. Best for intermediate to advanced trail and dirt jump riders who prioritize durability and controlled, stable geometry.