Contact us

Surly Lowside MTB frameset 26+/27.5' rainbow in the dark

Seen this cheaper?

The images above are symbolic in nature and may differ from the actually delivered goods respectively the delivery inclusion might differ.
Hence we please you to carefully read the item name and the item description. Just drop us a short mail in case that you have questions though.
  • Frameset only!

    Lowside is the bike that gets you across town for a quick rip on sigletrack, then over to the bar for a night out.

    Your BMX Bike All Grown Up

    Lowside is like the grownup version of the bike you rode when you were a kid and still had hopes and dreams and some semblance of ambition. Its just as happy riding singletrack as it is parked outside your favorite drinking establishment.

    Lowside is a single speed mountain bike. Singlespeeding has been a part of Surlys DNA since day one when we launched the 1x1 Rat Ride. After a lot of Homie Fall Fests and more feats of strength than we can recall, we decided to discontinue it a couple years back. Lowside picks up right where the 1x1 left off.

    Some have dubbed the Lowside the ultimate pub cruiser.

    • Modern trail standards: dropper post compatibility, 44mm headtube, Gnot-Boost rear spacing, thru-axles
    • Compatibility with most mountain bike standards makes it the perfect parts bin bike (no rim brakes allowed though)
    • Clearance for 26” x 3” or 27.5” x 2.8” tires

    • Frame: Surly Lowside Frame 4130 Chromoly steel.
    • Fork: Surly Lowside Fork 4130 Chromoly steel.
    • Seatpost Clamp: Surly Stainless 33.1mm clamp


    Rider Height 1.42m+ 1.52m+ 1.65m+ 1.75m+ 1.85m+
    Reach 414.5 429.3 445.3 461.0 477.0
    Stack 542.2 560.3 574.4 588.5 602.5
    Head Tube Angle 70.0 70.0 70.0 70.0 70.0
    Head Tube Length 110.0 125.0 140.0 155.0 170.0
    Seat Tube Length 316.0 366.0 416.0 466.0 516.0
    BB Drop 55.0 55.0 55.0 55.0 55.0
    Wheelbase 1068.0 1089.0 1110.0 1131.0 1152.0
    Chainstay Length 425.0 425.0 425.0 425.0 425.0
    Top Tube Length, Actual 562.4 575.6 589.7 608.5 630.4
    Top Tube Length, Effective 570.0 590.0 610.0 630.0 650.0
    Seat Tube Angle 74.0 74.0 74.0 74.0 74.0
    Standover Height 700.0 729.0 762.0 792.0 823.0
    Fork Length 420 420 420 420 420
    Fork Rake 47.0 47.0 47.0 47.0 47.0
    *Standover is measured from the top of the TT, at the center, with a tire measuring approximately 710mm

    • Frame Construction: 4130 Chromoly, Natch tubing, double-butted main triangle, TIG welded, ED coated
    • Fork Construction: 4130 Chromoly, Natch tubing, double-butted tapered fork blades, TIG welded, ED coated
    • Rear Dropout Configuration: Horizontal slotted with optional vertical dumpout
    • Rear Hub Spacing: "Gnot-Boost" 145mm, 12 x 142mm or 12 x 148mm (Surly axle included), 10 x 135mm with Surly 10/12 Adapter Washers (not included)
    • Front Hub Spacing: 15 x 110mm (Surly axle included)
    • Rear Brake: Disc 51mm I.S. (203mm max rotor)
    • Front Brake: Disc 51mm I.S. (203mm max rotor)
    • Head Tube: 44mm
    • Steerer Tube: 28.6mm (1-1/8")
    • Crown Race: 30mm (1-1/8")
    • Headset Upper (S.H.I.S): ZS44/28.6
    • Headset Lower (S.H.I.S): EC44/30
    • Seat Collar: 33.1mm
    • Seatpost: 30.9mm
    • Max Chainring (CL) [3]: 1x (Mtn): 33T, 1x (Boost): 36T
    • Bottom Bracket: 73mm threaded (1.37" x 24TPI)
    • Tire Clearance Frame [1]/[2]: 26 x 3.0", 27.5 x 2.8"
    • Tire Clearance Fork [1]: 26 x 3.0", 27.5 x 2.8"
    • Rigid Fork Spec: 420 x 47mm
    • Max Suspension Fork Length [4]: 490 x 47mm (26 100mm)
    • Bottle Mounts Frame: 1 Standard
    • Bottle Mounts Fork: N/A
    • Rack Mounts Frame: N/A
    • Rack Mounts Fork: N/A
    • Fender Mounts Frame: N/A
    • Fender Mounts Fork: N/A
    • Other Features: Internal dropper post routing compatible

    [1] Different tire and rim combinations will result in different clearances.
    [2] Depending on drivetrain configuration, tire clearance may be limited by the chain and not the frame.
    [3] Listed chainring clearance is worst case scenario. Clearances vary widely depending on components and configurations.
    [4] Suspension fork length listed at full extension (not at sag)
  • Rate this product

    Rate this product

    Unfortunately, there isn't any review yet. Be the first one and share your experiences with thousands of other riders! 😀
    • 1x Surly Lowside MTB frame
    • 1x Surly Lowside MTB rigid fork
    • Incl. Seat Post Clamp
  • Show all items from Surly

ready for sending in 1-3 business days