Surly Lowside Frameset

Surly Lowside Frameset
  • Color: Rainbow in the Dark
Rainbow in the Dark
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This item is not permitted to be shipped, however it can be purchased online and picked up at your convenience. Take a look at our Policies and Shipping page for more information. Specialized products are available at the following locations only: Chesapeake, Falls Church, Fort Lauderdale, Newport News, Virginia Beach, Williamsburg.


The Surly Lowside is the bike that gets you across town for a quick rip on singletrack, then over to the bar for a night out. It’s the bike you turn to when you’re not entirely sure what the night has in store. It’s the bike to grab when you want to have just as much fun riding to the trail as you do on the trail, itself. Singlespeeding is an integral part of Surly’s DNA, and the Lowside continues the tradition, by taking a simpler approach to trail riding.

- 100% Surly 4130 chromoly frame, main triangle is double-butted; 1 1/8" threadless chromoly fork
- Singlespeed "specific" (derailleur hanger: yes; Trip Guides: no)
- Dropper post routing
- Gnot-Boost rear spacing
- Front and rear thru-axles
- 26 x 3" or 27.5 x 2.8" tire clearance


Frame Surly Lowside
Fork Surly Lowside
Axles Front: 110 x 15mm
Rear: 148 x 12mm
Fork Compatibility 100mm, tapered or straight steerer
Wheel Compatibility Up to 26 x 3.00 or 27.5 x 2.80

* Subject to change without notice.

Part Numbers

Option UPC MPN
Rainbow in the Dark / X-Small 708752139930 FM0080
Rainbow in the Dark / Small 708752139923 FM0081
Rainbow in the Dark / Medium 708752139916 FM0082
Rainbow in the Dark / Large 708752139909 FM0083
Rainbow in the Dark / X-Large 708752139893 FM0084