S4

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S4 Aitken Frame 4.75 lbs




Mike wanted the S4 to be as simple and classic looking as possible while using every new development in materials and workmanship available to improve on the S3.5. We've been working on new material for a Down Tube for the last six months so once that was finished and tested we were ready to go. The end result is a clean, classic frame that's strong and still less than 5 pounds.




• S4 butted and tapered top tube
• S4 stronger and more dent resistant down tube
• S4 head tube (completely new design inside and out)
• S4 bottom bracket shell
• Single bend Chain stays and curved bridges for maximum tire clearance
• Dropout with a round seat stay cut for a cleaner peg fit
• Available in Matte Black, Burgundy, Tan, and Matte Clear
• American Made
SPECS

Sizes　　　　　　　　 20.5", 20.75", 21"
Backend length　　　 13.4"
Head-tube angle　　 75°
Seat-tube angle　　 71°
Standover　　　　　　 8.5"
BB height　　　　　　 11.6"
BB style　　　　　　 Mid　
Axle size 14mm
Brake mounts Thread On
Gyro tabs Optional
Weight 4.75 lbs