Twin Six

Twin Six Standard Rando Gravel Bike - Black 650B

  • Sale
  • $1,995.00
  • Regular price $3,990.00
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ūü§Ď 50% OFF RETAIL PRICE!!! WAS $3990, NOW $1,995!! ūü§Ď

One piece remaining in size Small / 50cm only (standover height: 75cm - typically fits riders from 167cm/5'6" - 178cm/5'10")

Here at Grubble Bikes we're bike riders too and we know how daunting it can be to purchase a bike! Reach out to us on WhatsApp, Facebook Messenger or email to discuss your bike build. We offer the Twin Six Standard Rando gravel bike in the True Black colorway with either a SRAM Rival 1 (with Stan's Grail wheels & Fizik finishing kit) or Shimano GRX 800 (with DT Swiss G1800 wheels & Ritchey finishing kit) build package in sizes 47, 50, 53 & 55cm. If you wish to purchase without discussing with us, simply indicate "SRAM" or "Shimano" and the size in the comments during checkout.
We loved every mile over the last six years spent getting gritty with the original Standard Rando. We knew improving on that experience would be an endeavor, but we took our time making the necessary refinements while ensuring the heart and soul of the original freedom machine remained intact. The Standard Rando 2.0 comes equipped with our new T6 Middle Finger dropout system, flat mount disc brake spec, 12mm front and rear thru axles, 44mm headtube, optional color-matched carbon fork, mounts for whatever you may want to carry and more. We have designed it to move you comfortably across town, across the finish line, and across the country. 

Twin Six Standard Rando complete build options are carefully curated component sets including all the parts necessary to get your freedom machine rolling. Our build kit options compliment the function and aesthetic of the frameset and have value unsurpassed by the competition. Twin Six build kits are ideal for anyone out there who wants to skip the guesswork, take parts gathering out of the equation and just concentrate on the road ahead.  Forever Forward.


  • T6 Standard 4130 butted chromoly steel tubing
  • Brass plated head badge
  • Collared 44mm inner diameter headtube
  • Collared 46mm x 68mm PF30 bottom bracket
  • Wishbone seat stay design
  • T6 Middle Finger dropout system
  • Replaceable derailleur hanger
  • Flat mount disc brake compatible
  • Front and rear thru axles included
  • 12mm x 142mm rear spacing
  • 12mm x 100mm front spacing
  • Uni-crown triple mount steel fork with tapered 1.125‚Äď1.5" steerer tube
  • Frame clearance for up to 700c x 43mm and 650b x 48mm tires
  • Fender clearance for 700c x 35mm or 650b x 47mm slicks
  • and 700c x 33mm or 650b x 44mm knobby tires
  • T6 Standard low profile black anodized downtube cable clips
  • Frame uses full length, external cable housing
  • Compatible with 140mm and 160mm rotors
  • 27.2mm diameter seat post¬†
  • 29.8mm Twin Six Standard seatpost clamp included
  • Rack and fender eyelets on steel fork
  • Optional color-matched or black fender set
  • Undercarriage water bottle mount on frame 55cm and up
  • Three main triangle water bottle mounts on frame 55cm and up
  • Steel fork as standard, matching¬†carbon fork available as an upgrade

Sizing and geometry chart located on the last image




  • ZS44 EC44

Wheelset and Tires

  • DT Swiss GR 1800 650B
  • WTB Venture Road Comp 650B

    Ritchey Comp Cockpit

    • Ritchey All-Road handlebar 12deg flare, 85mm drop
    • Ritchey 4-Axis-44 Comp stem
    • Ritchey 2-Bolt seatpost w/ 25 mm setback
    • Silicon grip bar tape
    • WTB Speed sadde¬†

     Shimano GRX groupset

    • 170mm crank, 40t chainring
    • 11-40t M8000 cassette
    • 140mm Ice Tech rotors

     *Pedals are not included with complete builds.