• A heart of gold, presented in our lightweight yet durable Premium A1 Aluminum, the Rockhopper’s butted aluminum frame features hydroformed top and downtubes to keep weight low and strength high, all while providing increased standover clearance, slick internal cable routing, and dropper-post compatibility.
• To ensure that the Rockhopper offers both the best fit and best performance for every person, no matter their measure, we’ve paired each Rockhopper frame size with the optimal wheel size. The result is a Rockhopper to fit every rider and the assurance that every Rockhopper is rolling on the best-handling wheel for its frame size. 
• Beautifully beastly, Shimano BR-MT200 hydraulic disc brakes pack a mean bite but deliver their power with a refined, intuitive feel to make for a package that punches way above its pay grade.
• Keep things simple with a durable 1x Shimano drivetrain with plenty of range and a clutch-equipped rear derailleur that keeps your ride quiet—and your chain on. 
• Pair dead-reliable hubs from Formula with our 25-millimeter internal diameter, hookless Specialized Alloy rims for a strong, light, and durable wheelset hat trick. 

Technical Specifications

Frameset

Seat Binder: Alloy, quick release, 34.9

Frame: 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

Suspension

Fork: RockShox Judy, Solo Air, Turnkey damper, 46mm offset, QR, 80/90/100mm travel (size-specific), steel steerer

Brakes

Front Brake: Shimano BR-MT200, hydraulic disc ,180/160mm

Rear Brake: Shimano BR-MT200, hydraulic disc, 160 mm

Drivetrain

Chain: KMC, X10, EPT anti-corrosion coating, 10-speed w/ Missing Link™

Rear Derailleur: Shimano Deore, RD-M5120, 10-speed

Shift Levers: Shimano Deore, RapidFire Plus, 10-speed

Bottom Bracket: Square-tapered, 73mm, internal bearings, 122.5mm spindle

Crankset: Stout 1x, forged alloy

Cassette: Sunrace, 11-46t, 10spd

Wheels & tires

Front Tire: Fast Trak Sport, 650b/29x2.35"

Rear Tire: Fast Trak Sport, 650b/29x2.35"

Front Hub: Formula DC-20, 6-Bolt, disc, 100x9mm spacing, quick-release

Rear Hub: Formula DC-22, 6-Bolt freehub, disc, 135x9mm spacing, quick-release

Spokes: Stainless, 14g

Inner Tubes: Standard 40mm PV 650B/29x1.75-2.4

Rims: Specialized Alloy, hookless, Tubeless ready, 25mm inner width

Cockpit

SeatPost: Alloy, 2-bolt clamp, 30.9mm

Saddle: Bridge Sport, Steel rails, 155/143mm

Grips: Specialized Trail Grips, lock-on

Handlebars: Specialized, alloy, 9-degree backsweep, 15mm rise, 31.8mm

Stem: Stout 3D-forged alloy, 31.8mm, 6-degree rise

Weight

Weight: 12.58 kg (27 lb, 11.7 oz)

Weight Size: MD

GEOMETRY

	XS - 27.5	S - 27.5	M - 27.5	S - 29	M - 29	L - 29	XL - 29	XXL - 29
Crank Length	165	170	170	170	170	170	175	175
Handlebar Width	700	720	740	720	740	740	740	740
Stem Length	35	45	60	45	60	60	70	70
Saddle Width	155	155	143	155	143	143	143	143
Seatpost Length	300	350	400	350	400	400	400	400
Wheel Size	27.5	27.5	29	27.5	29	29	29	29
Stack	559	573	607	589	616	626	640	654
Reach	375	395	405	415	425	445	465	485
Head-Tube Length	95	100	95	105	95	105	120	135
Head-Tube Angle	68	68	68.5	68	68.5	68.5	68.5	68.5
B-B Height	310	310	310	310	310	310	310	310
B-B Drop	43	43	62	43	62	62	62	62
Trail	97	97	97	97	97	97	97	97
Fork Length (full)	475	485	505	495	515	515	515	515
Fork Rake/Offset	42	42	46	42	46	46	46	46
Front-Center	630	656	672	682	696	719	745	770
Chain-Stay Length	440	440	440	440	440	440	440	440
Wheelbase	1067	1092	1105	1118	1128	1152	1178	1203
Top-Tube Length (horizontal)	541	565	586	589	608	630	654	679
Bike Stand-Over Height	658	695	732	735	754	781	820	853
Seat-Tube Length	310	350	360	400	400	450	500	560
Seat-Tube Angle	73.5	73.5	73.5	73.5	73.5	73.5	73.5	73.5
Crank Length	165	165	170	170	170	175	175	175
Handlebar Width	700	720	720	740	740	740	740	740
Stem Length	35	45	45	60	60	60	70	70
Seat-Post Length	300	350	350	400	400	400	400	400
Saddle Width	155	155	155	143	143	143	143	143