Bicycle Archive · Specification reportBicycle Archive · Specification reportVelopedia Archive ID 900004102
| Model year | 2023 |
|---|---|
| Brand | Specialized |
| Model | Riprock Coaster 20 |
| Bicycle type | Youth |
| Archive ID | 900004102 |
| Original MSRP | $399.99 |
| Colors | Satin Fiery Red / Dark Navy; Gloss Limestone / Purple Haze; Satin Deep Marine / Fiery Red; Gloss Dune White / White Sage |
| Sizes | 20 |
| Weight | 10.6kg (23 lb, 5.9 oz) |
| Frame construction | Specialized A1 Premium Aluminum |
|---|---|
| Frame material | Aluminum |
| Fork | Hi-Ten steel |
| Fork material | Steel |
| Crankset | Hi-Ten steel, 114mm; chainrings: Steel, 36T |
|---|---|
| Bottom bracket | Feimin FP-B701, 68MM |
| BB shell width | 68 mm |
| Chain | KMC Z510, single-speed, anti-drop, 1/2"x1/8" |
| Pedals | Nylon platform w/ reflectors |
| Brakes | (R) V-brake w/ tool-less reach adjust brake lever |
|---|
| Handlebar | BMX, steel, 10-degree backsweep, 4-degree upsweep, 130mm rise, 560mm width, 22.2mm |
|---|---|
| Stem | Die Cast Aluminum, 37mm length, 10 degree, 22.2 clamp diameter |
| Saddle | Specialized Kids' Henge |
| Seatpost | Steel, 25.4mm |
| Hubs | (F) Steel, bolt-on, 100mm spacing, loose ball bearings, 36h / (R) Coaster brake, bolt-on, loose ball bearings, 110mm spacing, 18T cog, 36h |
|---|---|
| Rims | 20" alloy, 16mm depth, 21mm internal width |
| Spokes | Stainless, 14g |
| Front tire | Rhythm Lite, 30 TPI, wire bead, 20x2.3" |
| Rear tire | Rhythm Lite, 30 TPI, wire bead, 20x2.3" |
| Effective top tube | 449 mm |
|---|---|
| Head tube | 80 mm |
| Head-tube angle | 70° |
| Seat-tube angle | 72° |
| Chainstay / rear center | 386 mm |
| Wheelbase | 858 mm |
| Bottom-bracket drop | 42 mm |
| Reach | 315 mm |
| Stack | 413 mm |
| Standover height | 477 mm |
| Fork offset / rake | 23 mm |
| Front center | 476 mm |
| Trail | 71 mm |
| Seatpost length | 220 mm |
| Crank length | 114 mm |
| Stem length | 37 mm |
| Handlebar width | 560 mm |
Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on October 27, 2026.