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(Some components in these photos may differ from the spec sheets. Please refer to the spec sheets below for accuracy)

There’s one in every family. That one that feels excluded from the bunch. If you’re down with that attitude because you like to go your own way, then we’d like to introduce you to the rowdiest member of the RSD family – the MiddleChild.

Some of our bikes are great at getting the job done – real authorities. The 29/27.5+ MiddleChild gets it done, but the only thing on the agenda is playtime. Every detail on this premium-quality handmade steel frame screams “skip work and let’s party!”

  • double-butted, heat-treated 4130 Chromoly steel tubing

  • full CNC-machined custom yoke that’ll take 2.8″ tires (or up to 2.6″ x 29)

  • 64.5 degree head tube and 74 degree seat tube angles paired with 140mm fork –  that aggressive geometry for both climbing and sending choice descent lines

  • boost spacing and short chainstays (adjustable from 415mm – 430mm) for super stability and loads of confidence in the rough stuff

  • The new V2 has a shorter and straighter seat tube on all sizes to allow for an even longer dropper post

  • Choose from either Duroc 40 27.5+ wheels with Maxxis Minion DHF & DHR II 2.8 tires or Duroc 35 29in wheels with Maxxis Minion DHF 2.5 Front and Aggressor 2.5 Rear


The MiddleChild is a purely new-school ‘Enduro’ hardtail…

…that will never get left behind.

Deore/D2 Build

  • Frame: 27.5+/29 Cr-Mo 4130 Double Butted and Heat Treated

  • Fork: DVO Diamond D2 27.5+/29 140mm 44mm

  • Headset: Cane Creek 40 Series ZS44/28.6 Top & EC44/40 Bottom

  • Handle Bar: Race Face 35mm Turbine R 20mm 780mm

  • Stem: FSA Comet 35 50mm

  • Grips: Lizard Skin Northshore

  • Crank: Race Face Turbine 73mm 175mm

  • Chain Ring: Race Face 30T Ring NW

  • BB: Race Face 73mm BSA

  • Chain: Shimano Deore M6100 126L 12spd

  • Cassette: Shimano Deore M6100 10-51T 12spd

  • Rear Shifter: Shimano Deore Trigger M6100 12spd

  • Rear Derailleur: Shimano Deore Trigger M6100 Long Cage 12spd

  • Brakes: Shimano SLX M7120 4 Pistons

  • Rotors: Shimano RT66M 180mm

  • Saddle: Cionlli 142mm

  • Seat Post: 30.9mm Race Face Ride or KS LEV Dropper (S 125mm, M 150mm, L 175mm & XL 200mm) with SouthPaw Lever

  • Rear Axle: SRAM 180mm Rear Maxle Ultimate 12x148mm


Wheels & Tires Option:

  • 27.5 Front & Rear Wheel: Sun Ringle Duroc 27.5x40mm 15x110mm & 12x148mm Boost

  • Tires: Maxxis Minion DHF & DHR II 27.5×2.8 3C EXO TR
    (Minimum Sliding Drop-Out Position – 415mm)

  • 29 Front & Rear Wheel: Sun Ringle Duroc 29x35mm 15x110mm & 12x148mm Boost

  • Tires: MAXXIS Minion DHF 29×2.5WT 3C/Max Terra/EXO Front and Aggressor 29×2.5WT 3C?Max Terra/EXO Rear
    (Minimum Sliding Drop-Out Position – 425mm)


Frame Weight with Sliding Inserts and Hardware
(M): 6 Lbs 10 oz
(L): 6 Lbs 14 oz


Complete Bike Weight 
(M): 31 Lbs 1 oz with Dropper and set-up Tubeless
(M): 30 Lbs 7 oz with Ride Seat Post and set-up Tubeless


Sizes: Sm, Med, Lrg, Xlrg


Finish: Matthew Black, Verdigris & Aubergine


Pricing: (NEW)
$3199.00 CAD / $2749.00 USD + Shipping
Complete w/Dropper: $3499.00 CAD / $2999.00 USD + Shipping
Frame Only: $949.00 CAD / $849.00 USD + Shipping


In light of the ongoing raw material shortage, and increased costs of components and shipping, we can no longer hold our pricing static. The final sale prices for frames, complete bikes and shipping may be adjusted once we have confirmation that shipments are in transit from overseas.


Included with the Frame Only option:
Rear 12x148mm Sliding Drop-out Inserts
SRAM Rear Maxle Ultimate 12x148mm
Seat Post Clamp

Prices and Specs are subject to change without notice.

Note: We are unable to accommodate any single component substitution from one build to another, BUT we can accommodate the substitution of an entire build. Pricing will be dependent on the build and/or frame material at RSD’s sole discretion. All prices listed are Minimum Suggested Retail.

Looking for something more versatile?

SERGEANT V5 Aluminum

Or maybe something lower, longer and slacker?

RS-291 Chromoly

How about a less expensive build option?


Ready for the ultimate hardtail?

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