Bicycle Archive · Specification reportBicycle Archive · Specification reportVelopedia Archive ID 900004319
| Model year | 2021 |
|---|---|
| Brand | Specialized |
| Model | Rockhopper Sport |
| Bicycle type | Mountain |
| Archive ID | 900004319 |
| Original MSRP | $800.00 |
| Colors | Gloss Blaze / Ice Papaya; Gloss Cobalt / Cast Blue; Gloss White Mountains / Dusty Turquoise; Satin Slate / Cool Grey; Satin Forest Green / Oasis |
| Sizes | XS; S; M |
| Frame construction | Specialized A1 premium butted alloy, zero-stack head tube, internal cable routing, 135x9mm forged dropouts, chainstay-mounted disc brake, replaceable alloy derailleur hanger, stealth rack mounts, dropper post compatible |
|---|---|
| Frame material | Aluminum |
| Fork | SR Suntour XCM 27.5, 30mm stanchions, Rx Tune, coil spring, QR, 80/90/100mm travel (size-specific), 42mm offset |
| Shifters | Shimano Altus, RapidFire Plus, 9-speed |
|---|---|
| Front derailleur | Shimano Altus FD-M2020 2-speed |
| Rear derailleur | Shimano Altus, RD-M2000, 9-speed |
| Crankset | Stout 2x, forged alloy |
| Bottom bracket | Square-tapered, 73mm, internal bearings, 122.5mm spindle |
| BB shell width | 73 mm |
| Cassette | SunRace, 9-Speed, 11-36t |
| Chain | KMC X9EPT, 9-speed, anti-corrosion coating w/ reusable Missing Link™ |
| Pedals | Specialized Body Geometry Fitness, platform, plastic |
| Brakes | (F) Tektro HD-M275, hydraulic disc, 180/160mm / (R) Tektro HD-M275, hydraulic disc, 160mm |
|---|
| Handlebar | Specialized, alloy, 9-degree backsweep, 15mm rise, 31.8mm |
|---|---|
| Stem | Stout 3D-forged alloy, 31.8mm, 6-degree rise |
| Saddle | Bridge Sport, Steel rails, 155/143mm |
| Seatpost | Alloy, 2-bolt clamp, 30.9mm |
| Hubs | (F) Formula 6-Bolt, disc, 100x9mm spacing, quick-release, 32H / (R) Formula SP-2125, 6-Bolt freehub, disc, 135x9mm spacing, quick-release |
|---|---|
| Rims | Specialized alloy, disc only, double-wall, 25mm inner width, 32h |
| Spokes | Stainless, 14g |
| Front tire | Ground Control Sport, 27.5x2.3" |
| Rear tire | Ground Control Sport, 27.5x2.3" |
| Seat tube | 310 mm |
|---|---|
| Effective top tube | 541 mm |
| Head tube | 95 mm |
| Head-tube angle | 68° |
| Seat-tube angle | 73.5° |
| Chainstay / rear center | 440 mm |
| Wheelbase | 1067 mm |
| Bottom-bracket drop | 43 mm |
| Bottom-bracket height | 310 mm |
| Reach | 375 mm |
| Stack | 559 mm |
| Standover height | 658 mm |
| Fork offset / rake | 42 mm |
| Front center | 630 mm |
| Trail | 97 mm |
| Fork length / axle-to-crown | 475 mm |
| Seatpost length | 300 mm |
| Crank length | 165 mm |
| Stem length | 35 mm |
| Handlebar width | 700 mm |
| Seat tube | 350 mm |
|---|---|
| Effective top tube | 565 mm |
| Head tube | 100 mm |
| Head-tube angle | 68° |
| Seat-tube angle | 73.5° |
| Chainstay / rear center | 440 mm |
| Wheelbase | 1092 mm |
| Bottom-bracket drop | 43 mm |
| Bottom-bracket height | 310 mm |
| Reach | 395 mm |
| Stack | 573 mm |
| Standover height | 695 mm |
| Fork offset / rake | 42 mm |
| Front center | 656 mm |
| Trail | 97 mm |
| Fork length / axle-to-crown | 485 mm |
| Seatpost length | 350 mm |
| Crank length | 170 mm |
| Stem length | 45 mm |
| Handlebar width | 720 mm |
| Seat tube | 400 mm |
|---|---|
| Effective top tube | 589 mm |
| Head tube | 105 mm |
| Head-tube angle | 68° |
| Seat-tube angle | 73.5° |
| Chainstay / rear center | 440 mm |
| Wheelbase | 1118 mm |
| Bottom-bracket drop | 43 mm |
| Bottom-bracket height | 310 mm |
| Reach | 415 mm |
| Stack | 589 mm |
| Standover height | 735 mm |
| Fork offset / rake | 42 mm |
| Front center | 682 mm |
| Trail | 97 mm |
| Fork length / axle-to-crown | 495 mm |
| Seatpost length | 400 mm |
| Crank length | 170 mm |
| Stem length | 60 mm |
| Handlebar width | 740 mm |
Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on October 26, 2026.