2008 Specialized Hotrock FS 24

Best for 4’3″-4’9″ riders. Lightweight childrens bike with grown-up bike technology and components – A1 aluminum alloy frame, Shimano 21-speed drivetrain, front shocks, 24″-diameter wheels, 24×2.125″ all terrain tires. 

This bike was left outside for too long. Aluminum frame wasn’t affected, and I de-rusted or replaced all steel and rubber components. This bike looks and rides like new again.

This is Yianni’s bike now.

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Before/After Pics

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New Components

Tires: Specialized Roller 24×2.125″ all terrain tires

Inner tubes: Specialized/Kenda

Cables/housings: Shimano

Shifters: MicroSHIFT 3×7 + composite handlebar grips

Chain: SRAM PC951

Pedals: Composite platform with reflectors

Also new: stainless screws, rubber cable protectors, bottle holder

Restoration Pics

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Original Components

  • Frame: A1 premium aluminum, 13.5″ frame w/externally riveted HT, double-butted and formed ORE DT/11, disc mounts, forged dropouts with replaceable 98954020 alloy derailleur hanger.
  • Fork: RST CapaT24ML, 50mm travel, 25.4mm stanchions and 1-1/8″ steerer, one piece alloy lowers with spring assisted seals, coil springs MCU with preload adjust and mechanical LO
  • Wheels: 24″ Specialized Alex HRXC double wall rims with CNC sidewalls; forged alloy hubs, 32H, polished races, Alloy QR, stainless pokes 1.8mm
  • Tires: Specialized Fast Track 24×1.8″, 60 TPI, wire bead
  • Inner tubes: Specialized, Schrader valve
    Headset: 1-1/8″ threadless
  • Stem: Alloy A-Head
  • Handlebars: Alloy, flat, 540mm wide, 6 degree sweep
  • Brakes: Pro Max alloy “V” with linear spring
  • Brake Levers: Tektro Junior
  • Front derailleur: Shimano Altus FD M310-6, top swing, 34.9mm clamp
  • Rear derailleur: SRAM 3.0
  • Shift levers: SRAM 3.0 Comp GripShift
  • Freewheel: Shimano HG-37, 7-speed, 14-28T
  • Chain: KMC Z7, 1/2″x3/32″ with reusable key link
  • Crankset: Truativ ISO Flow 3.0, replaceable rings
  • Chainrings: 42/32/22T
  • Bottom Bracket: TH cartridge, square taper, 68x113mm
  • Pedals: Steel cage, composite body. 9/16″
  • Seat post: Alloy Micro Adjust 27.2mm
  • Seat binder: Alloy collar with QR
  • Grips: Kraton, SRAM 3.0 Comp GripShift type
  • Saddle: Specialized Body Geometry Kids MTB, kevlar sides, front and rear bumpers