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MIDDLECHILD Chromoly

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
  • Choose from either Duroc 40 27.5+ wheels with Nobby Nic 27.5×2.8 Addix SpeedGrip 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.

Related Products

  • Frame: 27.5+/29 Cr-Mo 4130 Double Butted and Heat Treated
  • Fork: Rockshox Pike Select RC 27.5+/29 140mm 51mm
  • Headset: Cane Creek ZS-44
  • Handle Bar: Race Face 35mm Turbine R 780mm
  • Stem: Race Face 35mm Aeffect R 50mm
  • Grips: Lizard Skin Northshore
  • Front Wheel: Sun Ringle Duroc 27.5x40mm Front 15x110mm Boost
  • Rear Wheel: Sun Ringle Duroc 27.5x40mm Rear 12x148mm Boost
  • Crank: Race Face Turbine Cinch 175mm DM
  • Chain Ring: Race Face 30T Ring NW
  • BB: Race Face 73mm BSA
  • Chain: KMC 12spd
  • Cassette: Shimano SLX 10-51T 12spd
  • Rear Shifter: Shimano SLX Trigger 12spd
  • Rear Derailleur: Shimano SLX Long Cage 12spd
  • Brakes: Shimano SLX 4 Pistons M7120
  • Rotors: Shimano SLX 180mm
  • Saddle: WTB Volt Comp 142mm
  • Seat Post: Race Face Turbine / KS LEV Dropper (S 125mm, M & L 150mm, XL 175mm) with SouthPaw Lever
  • Rear Axle: SRAM 180mm Rear Maxle Ultimate 12x148mm
  • Tires: Schwalbe Nobby Nic 27.5 x 2.8 Addix Speedgrip

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

Complete Bike Weight 
(M): 30 Lbs 1 oz with Dropper and set-up Tubeless
(M): 29 Lbs 7 oz with Turbine Seat Post and set-up Tubeless

Sizes: Sm, Med, Lrg, Xlrg

Finish: Matte Black, Turquoise & Orange

Pricing:
Complete : $2949.00 CAD / $2499.00 USD
Complete w/Dropper : $3299.00 CAD / $2799.00 USD
Frame Only: $799.00 CAD / $699.00 USD + Shipping

Included with the Frame Only option:
Cane Creek ZS-44 Headset for tapered steerer tube
Rear 12x148mm Sliding Drop-out Inserts
SRAM Rear Maxle Ultimate 12x148mm
Seat Post Clamp

All prices listed are Minimum Suggested Retail

(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 of the build and/or frame material at RSD’s sole discretion)

Prices and Specs are subject to change without notice.

  • Frame: 27.5+/29 Cr-Mo 4130 Double Butted and Heat Treated
  • Fork: Rockshox Pike Select RC 27.5+/29 140mm 51mm
  • Headset: Cane Creek ZS-44
  • Handle Bar: Race Face 35mm Turbine R 780mm
  • Stem: Race Face 35mm Aeffect R 50mm
  • Grips: Lizard Skin Northshore
  • Front Wheel: Sun Ringle Duroc 29x35mm Front 15x110mm Boost
  • Rear Wheel: Sun Ringle Duroc 29x35mm Rear 12x148mm Boost
  • Crank: Race Face Turbine Cinch 175mm DM
  • Chain Ring: Race Face 30T Ring NW
  • BB: Race Face 73mm BSA
  • Chain: KMC 12spd
  • Cassette: Shimano SLX 10-51T 12spd
  • Rear Shifter: Shimano SLX Trigger 12spd
  • Rear Derailleur: Shimano SLX Long Cage 12spd
  • Brakes: Shimano SLX 4 Pistons M7120
  • Rotors: Shimano SLX 180mm
  • Saddle: WTB Volt Comp 142mm
  • Seat Post: Race Face Turbine / KS LEV Dropper (S 125mm, M & L 150mm, XL 175mm) with SouthPaw Lever
  • Rear Axle: SRAM 180mm Rear Maxle Ultimate 12x148mm
  • Tires: MAXXIS Minion DHF 29×2.5WT 3C/Max Terra/EXO Front and Aggressor 29×2.5WT 3C/Max Terra/EXO Rear

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

Complete Bike Weight 
(M): 30 Lbs 1 oz with Dropper and set-up Tubeless
(M): 29 Lbs 7 oz with Turbine Seat Post and set-up Tubeless

Sizes: Sm, Med, Lrg, Xlrg

Finish: Matte Black, Turquoise & Orange

Pricing:
Complete : $2949.00 CAD / $2499.00 USD
Complete w/Dropper : $3299.00 CAD / $2799.00 USD
Frame Only: $799.00 CAD / $699.00 USD + Shipping

Included with the Frame Only option:
Cane Creek ZS-44 Headset for tapered steerer tube
Rear 12x148mm Sliding Drop-out Inserts
SRAM Rear Maxle Ultimate 12x148mm
Seat Post Clamp

All prices listed are Minimum Suggested Retail

(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 of the build and/or frame material at RSD’s sole discretion)

Prices and Specs are subject to change without notice.

Frame Specs

  • Handmade Frame: 27.5+/29 Double Butted Chromoly 4130 Heat Treated
  • CNC Machined Custom Yoke: Chromoly 4130
  • CNC Machined Drop-Out: Chromoly 4130
  • CNC Machined Head Tube: 44mm
  • CNC Machined Bottom Bracket Shell: 73mm BSA
  • CNC Machined Sliding Inserts: 7000 Series Aluminum – 12mm Maxle and Post Disc Mount 160mm
  • Dropper Post Routing: Internal
  • Hardware: Stainless Steel
  • Fork Length: 551mm (140mm)
  • Rear Spacing: 148mm
  • Seat Post Clamp: 34.9mm
  • Seat Post: 30.9mm
  • Max Tire Size: 27.5×2.8in or 29×2.6in – Optimized for 2.8in tires, some 3.0 tire/rim combinations may have enough clearance. Rider discretion is advised
  • Max Fork Length: 561mm Axle to Crown (150mm Travel)
  • Max Dropper Post Insertion Length: Small 180mm, Medium 220mm, Large 240mm, XL 260mm
  • Torques Specs for 4 Drop-Out Bolts: 17N/m to 20N/m
Size Chart


Diagram
image
Geometry — Metric

27.5+ Middlechild STATIC Small Medium Large XL
HT Angle A 64.5° 64.5° 64.5° 64.5°
ST Angle B 74° 74° 74° 74°
Actual TT C 550 586 604 631
Effective TT D 586 625 642 669
Seat Tube E 410 450 470 490
Chainstay F 415-430 415-430 415-430 415-430
BB Height G 320 320 320 320
Standover Height H 695 710 714 717
BB Drop (mm) I -40 -40 -40 -40
Stack J 610 619 619 629
Reach K 410 448 465 489
Head Tube (mm) L 100 110 110 120
Fork length (mm) M 551 (140 Travel) 551 (140 Travel) 551 (140 Travel) 551 (140 Travel)
Fork Offset (mm) N 51 51 51 51
Tire Size (in) O 2.80 2.80 2.80 2.80
Wheelbase 1152-1167 1193-1205 1210-1225 1238-1253
Rider 155-170 170-178 178-185 185-195
HT Angle A 64.9°
Fork length (mm) M 541 (130 Travel)
BB Height G 315
HT Angle A 64.1°
M 561 (150 Travel)
BB Height G 325
Fork length (mm) M 551 (140 Travel)
Tire Size (in) O 27.5×3.00
BB Height G 325
Fork length (mm) M 551 (140 Travel)
Tire Size (in) O 27.5×2.6
BB Height G 315
Fork length (mm) M 551 (140 Travel)
Tire Size (in) O 27.5×2.4
BB Height G 310
Fork length (mm) M 551 (140 Travel)
Tire Size (in) O 26×2.8
BB Height G 308
Fork length (mm) M 551 (140 Travel)
Tire Size (in) O 29×2.4
BB Height G 330
Fork length (mm) M 551 (140 Travel)
Tire Size (in) O 29×2.6
BB Height G 335

Geometry — Imperial

27.5+ Middlechild STATIC Small Medium Large XL
HT Angle A 64.5° 64.5° 64.5° 64.5°
ST Angle B 74° 74° 74° 74°
Actual TT C 21.65 23.07 23.78 24.84
Effective TT D 23.07 24.61 25.28 26.34
Seat Tube E 16.14 17.71 18.50 19.29
Chainstay F 16.30-16.90 16.30-16.90 16.30-16.90 16.30-16.90
BB Height G 12.60 12.60 12.60 12.60
Standover Height H 27.36 27.95 28.11 28.23
BB Drop (mm) I -40 -40 -40 -40
Stack J 24.02 24.37 24.37 24.76
Reach K 16.18 17.64 18.31 19.25
Head Tube (mm) L 100 110 110 120
Fork length (mm) M 551 (140 Travel) 551 (140 Travel) 551 (140 Travel) 551 (140 Travel)
Fork Offset (mm) N 51 51 51 51
Tire Size (in) O 2.80 2.80 2.80 2.80
Wheelbase 45.35-45.94 46.97-47.44 47.64-48.23 48.74-49.33
Rider 5’2-5’7 5’7-5’10 5’10-6’1 6’1-6’5
HT Angle A 64.9°
Fork length (mm) M 541 (130 Travel)
BB Height G 12.40
HT Angle A 64.1°
Fork length (mm) M 561 (150 Travel)
BB Height G 12.80
Fork length (mm) M 551 (140 Travel)
Tire Size (in) O 27.5×3.00
BB Height G 12.80
Fork length (mm) M 551 (140 Travel)
Tire Size (in) O 27.5×2.6
BB Height G 12.40
Fork length (mm) M 551 (140 Travel)
Tire Size (in) O 27.5×2.4
BB Height G 12.20
Fork length (mm) M 551 (140 Travel)
Tire Size (in) O 26×2.8
BB Height G 12.13
Fork length (mm) M 551 (140 Travel)
Tire Size (in) O 29×2.4
BB Height G 12.99
Fork length (mm) M 551 (140 Travel)
Tire Size (in) O 29×2.6
BB Height G 13.19

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